US Pat. No. 9,426,850

SYSTEMS AND METHODS FOR CURRENT MATCHING OF LED CHANNELS

On-Bright Electronics (Sh...

1. A system for generating a plurality of channel currents, the system comprising:
a first channel current divider configured to generate a first input current, a second input current, and a third input current
based at least in part on a first channel driving current;

a second channel current divider configured to generate a fourth input current, a fifth input current, and a sixth input current
based at least in part on a second channel driving current;

a first channel driver configured to generate a first channel current based at least in part on the first input current, the
second input current, and the third input current; and

a second channel driver configured to generate a second channel current based at least in part on the fourth input current,
the fifth input current, and the sixth input current;

wherein:
a sum of the first input current and the second input current is equal to the first channel driving current;
the second input current is equal to the third input current;
a sum of the fourth input current and the fifth input current is equal to the second channel driving current; and
the fifth input current is equal to the sixth input current.

US Pat. No. 9,148,061

SYSTEMS AND METHODS FOR CONSTANT VOLTAGE CONTROL AND CONSTANT CURRENT CONTROL

On-Bright Electronics (Sh...

1. A system for regulating a power conversion system, the system comprising:
a system controller including a current regulation component and a drive component, the system controller further including
a first controller terminal connected to the current regulation component and a second controller terminal connected to the
drive component;

a feedback component connected to the first controller terminal and configured to receive an output signal associated with
a secondary side of the power conversion system; and

a capacitor including a first capacitor terminal and a second capacitor terminal, the first capacitor terminal being connected,
directly or indirectly, to the first controller terminal;

wherein:
the current regulation component is configured to receive at least a current sensing signal and affect a feedback signal at
the first controller terminal based on at least information associated with the current sensing signal, the current sensing
signal being associated with a primary current flowing through a primary winding of the power conversion system; and

the drive component is configured to process information associated with the current sensing signal and the feedback signal,
generate a drive signal based on at least information associated with the current sensing signal and the feedback signal,
and provide the drive signal to a switch through the second controller terminal in order to adjust the primary current;

wherein the current regulation component includes:
a signal processing component configured to receive at least the current sensing signal, and generate a processed signal based
on at least information associated with the current sensing signal;

an error amplifier configured to receive the processed signal and a reference signal and generate a first amplified signal
based on at least information associated with the processed signal and the reference signal; and

a low pass filter configured to receive the first amplified signal and generate a filtered signal based on at least information
associated with the first amplified signal in order to affect the drive signal;

wherein the low pass filter includes:
a first amplifier including a first input amplifier terminal, a second input amplifier terminal and an output amplifier terminal;
and

a first resistor including a first resistor terminal and a second resistor terminal;
wherein:
the second input amplifier terminal is connected to the output amplifier terminal;
the first resistor terminal is connected to the output amplifier terminal;
the second resistor terminal is connected, directly or indirectly, to the first capacitor terminal;
the first amplifier is configured to receive at least the first amplified signal at the first input amplifier terminal and
generate a second amplified signal based on at least information associated with the first amplified signal in order to affect
the feedback signal; and

the first amplified signal is associated with the current sensing signal.

US Pat. No. 9,059,688

HIGH-PRECISION OSCILLATOR SYSTEMS WITH FEED FORWARD COMPENSATION FOR CCFL DRIVER SYSTEMS AND METHODS THEREOF

On-Bright Electronics (Sh...

1. A system for generating one or more ramp signals, the system comprising:
an oscillator configured to generate at least a clock signal; and
a ramp signal generator configured to receive at least the clock signal and generate a first ramp signal, the ramp signal
generator being coupled to a resistor including a first terminal and a second terminal;

wherein the resistor being configured to receive an input voltage at the first terminal and being coupled to the ramp signal
generator at the second terminal, the resistor being associated with a resistance value;

wherein:
the clock signal is associated with at least a predetermined frequency;
the predetermined frequency does not change if the input voltage changes from a first magnitude to a second magnitude, the
first magnitude being different from the second magnitude;

the first ramp signal is associated with at least the predetermined frequency and a first slope, the first slope being related
to an increase of the first ramp signal; and

the first slope changes if the input voltage changes from the first magnitude to the second magnitude.

US Pat. No. 9,554,432

SYSTEMS AND METHODS FOR DIMMING CONTROL USING SYSTEM CONTROLLERS

On-Bright Electronics (Sh...

1. A system for dimming control, the system comprising:
a system controller including a first controller terminal and a second controller terminal;
a transistor including a first transistor terminal, a second transistor terminal and a third transistor terminal; and
a first resistor including a first resistor terminal and a second resistor terminal;
wherein:
the first transistor terminal is coupled, directly or indirectly, to the second controller terminal;
the first resistor terminal is coupled to the second transistor terminal; and
the second resistor terminal is coupled to the third transistor terminal;
wherein:
the system controller is configured to receive an input signal at the first controller terminal and to generate an output
signal at the second controller terminal based on at least information associated with the input signal; and

the transistor is configured to receive the output signal at the first transistor terminal and to change between a first condition
and a second condition based on at least information associated with the output signal;

wherein the system controller is further configured to, if the input signal becomes higher than a threshold, change the output
signal after a delay in order to change the transistor from the first condition to the second condition.

US Pat. No. 9,065,401

AMPLIFICATION SYSTEMS AND METHODS WITH NOISE REDUCTIONS

On-Bright Electronics (Sh...

1. A system for amplifying an input signal to generate an output signal, the system comprising:
a current generator configured to receive a first voltage signal, process information associated with the first voltage signal
and a first reference signal, and generate a current signal based on at least information associated with the first voltage
signal and the first reference signal; and

a comparator configured to receive a second voltage signal associated with a modulation frequency and a third voltage signal,
and generate a modulation signal related to the modulation frequency based on at least information associated with the second
voltage signal and the third voltage signal, the second voltage signal being related to the current signal, the third voltage
signal being related to an input signal, the first voltage signal and a feedback signal, the feedback signal being associated
with an output signal;

wherein:
in response to the first voltage signal increasing in magnitude, the current signal decreases in magnitude; and
in response to the current signal decreasing in magnitude, the modulation frequency decreases in magnitude.

US Pat. No. 9,048,738

SYSTEMS AND METHODS FOR ZERO VOLTAGE SWITCHING IN POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system for regulating a power converter, the system comprising:
a controller configured to generate a first switching signal and a second switching signal;
a first switch configured to receive the first switching signal, the first switch being coupled to an auxiliary winding of
the power converter further including a primary winding and a secondary winding; and

a second switch configured to receive the second switching signal and coupled to the primary winding of the power converter;
wherein the controller is further configured to:
change, at a first time, the second switching signal to open the second switch;
maintain, from the first time to a second time, the first switching signal to keep the first switch open; and
change, at the second time, the first switching signal to close the first switch;
wherein the controller is further configured to:
change, at a third time, the first switching signal to open the first switch;
maintain, from the third time to a fourth time, the second switching signal to keep the second switch open; and
change, at the fourth time, the second switching signal to close the second switch.

US Pat. No. 9,054,644

AMPLIFICATION SYSTEMS AND METHODS WITH ONE OR MORE CHANNELS

On-Bright Electronics (Sh...

1. A system for amplifying multiple input signals to generate multiple output signals, the system comprising:
a first channel configured to receive one or more first input signals, process information associated with the one or more
first input signals and a first ramp signal, and generate one or more first output signals based on at least information associated
with the one or more first input signals and the first ramp signal;

a second channel configured to receive one or more second input signals, process information associated with the one or more
second input signals and a second ramp signal, and generate one or more second output signals based on at least information
associated with the one or more second input signals and the second ramp signal; and

a third channel configured to receive one or more third input signals, process information associated with the one or more
third input signals and a third ramp signal, and generate one or more third output signals based on at least information associated
with the one or more third input signals and the third ramp signal;

wherein:
the first ramp signal corresponds to a first phase;
the second ramp signal corresponds to a second phase; and
the first phase and the second phase are different.

US Pat. No. 9,088,217

SYSTEMS AND METHODS FOR LOAD COMPENSATION WITH PRIMARY-SIDE SENSING AND REGULATION FOR FLYBACK POWER CONVERTERS

On-Bright Electronics (Sh...

1. A system for regulating an output voltage of a power conversion system, the system comprising:
a sampling component located on a chip configured to receive an input voltage through a terminal, the sampling component being
configured to sample the input voltage and generate a sampled voltage;

an error amplifier configured to process information associated with the sampled voltage and a threshold voltage and generate
a first output signal;

a first signal generator configured to generate a second output signal and one or more third output signals;
a comparator configured to receive the first output signal and the second output signal and generate a comparison signal;
a gate driver directly or indirectly coupled to the comparator and configured to generate a drive signal based on at least
information associated with the comparison signal; and

a current generator configured to receive at least the one or more third output signals and generate a compensation current
flowing out of the chip through the terminal;

wherein:
the gate driver is further coupled to a first switch configured to receive the drive signal and affect a first current flowing
through a primary winding coupled to a secondary winding;

the secondary winding is associated with at least an output voltage of a power conversion system, the power conversion system
including at least the primary winding, the secondary winding, and an auxiliary winding, the auxiliary winding being coupled
to the secondary winding; and

the input voltage is associated with at least the auxiliary winding and depends on at least the output voltage and the compensation
current;

wherein:
the second output signal starts to increase from a first magnitude at a first time;
the one or more third output signals represent a first time period since the first time during which the second output signal
increases in magnitude; and

the compensation current decreases in magnitude if a second time period increases, the second time period starting from the
first time and ending at a second time when the second output signal becomes equal to the first output signal in magnitude.

US Pat. No. 9,408,269

SYSTEMS AND METHODS FOR DIMMING CONTROL USING TRIAC DIMMERS

On-Bright Electronics (Sh...

1. A system for dimming control of one or more light emitting diodes, the system comprising:
one or more signal processing components configured to receive a first signal associated with a TRIAC dimmer, process information
associated with the first signal, determine whether the TRIAC dimmer is in a first condition, a second condition, or a third
condition based on at least information associated with the first signal, generate a second signal based on at least information
associated with the first signal, and send the second signal to a switch;

wherein the one or more signal processing components are further configured to:
if the TRIAC dimmer is determined to be in the first condition, generate the second signal to cause the switch to be opened
and closed corresponding to a modulation frequency;

if the TRIAC dimmer is determined to be in the second condition, generate the second signal to cause the switch to remain
closed for a first period of time until at least the TRIAC dimmer changes from the second condition to the first condition,
the first period of time being larger than a modulation period corresponding to the modulation frequency; and

if the TRIAC dimmer is determined to be in the third condition, generate the second signal to cause the switch to remain open
for a second period of time, the second period of time being larger than the modulation period.

US Pat. No. 9,106,142

SYSTEMS AND METHODS OF PRIMARY-SIDE SENSING AND REGULATION FOR FLYBACK POWER CONVERTER WITH HIGH STABILITY

On-Bright Electronics (Sh...

1. An apparatus comprising:
an error amplifier configured to receive a first voltage and an adjustment current and generate a compensation voltage with
a capacitor based on at least information associated with the first voltage and the adjustment current, the first voltage
being associated with a feedback voltage;

a current generator configured to receive the compensation voltage and generate the adjustment current and a first current
based on at least information associated with the compensation voltage; and

a driving component configured to receive the first current, a second current and a sensing voltage, generate a drive signal
based on at least information associated with the first current, the second current and the sensing voltage, and output the
drive signal to a switch in order to affect a third current flowing through a primary winding of a power conversion system;

wherein:
the feedback voltage is associated with an output current of the power conversion system; and
the sensing voltage is associated with the third current;
wherein:
the error amplifier is characterized by a transconductance; and
the error amplifier is further configured to change the transconductance based on at least information associated with the
adjustment current so that the transconductance decreases with the decreasing output current of the power conversion system.

US Pat. No. 9,048,742

SYSTEMS AND METHODS FOR ADJUSTING CURRENT CONSUMPTION OF CONTROL CHIPS TO REDUCE STANDBY POWER CONSUMPTION OF POWER CONVERTERS

On-Bright Electronics (Sh...

1. An apparatus for a power conversion system, the apparatus comprising:
one or more power-consumption components configured to receive a first signal associated with a feedback signal, a current
sensing signal and an input voltage, the feedback signal being related to an output signal of a power conversion system, the
current sensing signal representing one or more peak magnitudes related to a current flowing through a primary winding of
the power conversion system;

wherein:
the one or more power-consumption components are further configured to reduce power consumption in response to the feedback
signal being smaller than a feedback threshold in magnitude for a first predetermined period of time, the current sensing
signal being smaller than a current sensing threshold in magnitude for a second predetermined period of time, and the input
voltage being smaller than a first threshold in magnitude for a third predetermined period of time; and

each of the first predetermined period of time, the second predetermined period of time, and the third predetermined period
of time is equal to or larger than zero in magnitude.

US Pat. No. 9,143,039

SYSTEMS AND METHODS FOR REDUCING ELECTROMAGNETIC INTERFERENCE BY ADJUSTING SWITCHING PROCESSES

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:
a signal generator configured to receive a feedback signal associated with an output signal of the power conversion system
and a current sensing signal associated with a primary current flowing through a primary winding of the power conversion system
and generate a modulation signal based on at least information associated with the feedback signal and the current sensing
signal; and

a driving component configured to receive the modulation signal and output a drive signal to a switch based on at least information
associated with the modulation signal;

wherein the driving component is further configured to, if the modulation signal changes from a first logic level to a second
logic level, change the drive signal in magnitude from a first magnitude value to a second magnitude value during a first
time period in order to close the switch, the first time period being larger than zero;

wherein:
the driving component is further configured to, if the modulation signal changes from the first logic level to the second
logic level, change the drive signal in magnitude from the first magnitude value to a third magnitude value at a first slope
with respect to time and change the drive signal in magnitude from the third magnitude value to the second magnitude value
at a second slope with respect to time;

the second slope is smaller than the first slope in magnitude; and
the third magnitude value is larger than the first magnitude value and smaller than the second magnitude value.

US Pat. No. 9,088,218

SYSTEMS AND METHODS FOR CURRENT CONTROL OF POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

3. The system controller of claim 1 wherein the detection signal represents whether the demagnetization period has started and whether the demagnetization period
has ended.

US Pat. No. 9,385,612

SYSTEMS AND METHODS FOR CONSTANT VOLTAGE MODE AND CONSTANT CURRENT MODE IN FLYBACK POWER CONVERTERS WITH PRIMARY-SIDE SENSING AND REGULATION

On-Bright Electronics (Sh...

1. A system for regulating a power converter, the system comprising:
a ramping signal generator configured to receive a demagnetization signal and generate a ramping signal;
a first comparator configured to receive the ramping signal and a first threshold signal and generate a first comparison signal
based on at least information associated with the ramping signal and the first threshold signal;

a second comparator configured to receive a sensed signal and a second threshold signal and generate a second comparison signal,
the sensed signal being associated with a first current flowing through a primary winding of the power converter; and

a modulation-and-drive component configured to receive the first comparison signal and the second comparison signal and output
a drive signal to a switch, the switch being configured to affect the first current flowing through the primary winding;

wherein:
the demagnetization signal is associated with a demagnetization duration;
the drive signal is associated with a switching period; and
the system is further configured to keep a ratio of the demagnetization duration to the switching period constant;
wherein:
the ramping signal generator includes a capacitor, a current source, and a current sink;
wherein:
the capacitor is configured to be discharged by the current sink in response to the demagnetization signal being at a first
logic level and charged by the current source in response to the demagnetization signal being at a second logic level; and

the capacitor is further configured to output the ramping signal.

US Pat. No. 9,293,980

SYSTEMS AND METHODS FOR PROTECTING POWER CONVERSION SYSTEMS FROM THERMAL RUNAWAY

On-Bright Electronics (Sh...

1. A system controller for protecting a power conversion system, the system controller comprising:
a protection component configured to receive a feedback signal, a reference signal, and a demagnetization signal generated
based on at least information associated with the feedback signal, process information associated with the feedback signal,
the reference signal, and the demagnetization signal, and generate a protection signal based on at least information associated
with the feedback signal, the reference signal, and the demagnetization signal, the demagnetization signal being related to
multiple demagnetization periods of the power conversion system, the multiple demagnetization periods including a first demagnetization
period and a second demagnetization period; and

a driving component configured to receive the protection signal and output a drive signal to a switch configured to affect
a current flowing through a primary winding of the power conversion system;

wherein the protection component is further configured to:
process information associated with the feedback signal and the reference signal during a first detection period, the first
detection period including a first starting time and a first ending time, the first starting time being at or after a first
demagnetization end of the first demagnetization period;

determine, during the first detection period, a first number of times that the feedback signal changes from being smaller
than the reference signal to being larger than the reference signal in magnitude; and

determine whether the first number of times exceeds a predetermined threshold at the first ending time;
wherein the protection component and the driving component are further configured to, in response to the first number of times
not exceeding the predetermined threshold at the first ending time, output the drive signal to cause the switch to open and
remain open in order to protect the power conversion system.

US Pat. No. 9,584,025

SYSTEMS AND METHODS FOR FLYBACK POWER CONVERTERS WITH SWITCHING FREQUENCY AND PEAK CURRENT ADJUSTMENTS BASED ON CHANGES IN FEEDBACK SIGNALS

On-Bright Electronics (Sh...

1. A system for a power converter, the system comprising:
a pulse-width-modulation generator configured to receive at least a first comparison signal associated with at least a feedback
signal related to an output current of the power converter and generate a modulation signal based at least in part on the
first comparison signal, the modulation signal being associated with a modulation frequency;

a driver component configured to receive the modulation signal and output a drive signal to a switch to adjust a first current
flowing through a primary winding of the power converter, the first current being associated with a peak magnitude for each
modulation period corresponding to the modulation frequency; and

a detection component configured to sample the feedback signal to generate a first sampled signal for a first modulation period
and to sample the feedback signal to generate a second sampled signal for a second modulation period, the detection component
being further configured to receive the first sampled signal and the second sampled signal in magnitude, the second modulation
period being after the first modulation period;

wherein the system for the power converter is further configured to:
determine whether the first sampled signal subtracted by the second sampled signal satisfies one or more first conditions;
and

in response to the one or more first conditions being satisfied, increase the modulation frequency and the peak magnitude
related to the first current.

US Pat. No. 9,119,242

SYSTEMS AND METHODS FOR PROVIDING POWER TO HIGH-INTENSITY-DISCHARGE LAMPS

On-Bright Electronics (Sh...

1. A system for driving one or more high-intensity-discharge lamps, the system comprising:
a regulation component configured to receive an input signal indicating a power associated with the one or more high-intensity-discharge
lamps and generate a first signal based on at least information associated with the input signal;

a controller component configured to receive the first signal and a second signal indicating a voltage associated with the
one or more high-intensity-discharge lamps, wherein the controller component is further configured to generate an output signal
based on at least information associated with the first signal and the second signal in order to adjust a current associated
with the one or more high-intensity-discharge lamps; and

a gate driver configured to:
receive the output signal changing between a first logic level and a second logic level;
if the output signal is at the first logic level, cause the current associated with the one or more high-intensity-discharge
lamps to flow in a first direction; and

if the output signal is at the second logic level, cause the current associated with the one or more high-intensity-discharge
lamps to flow in a second direction, the second direction being different from the first direction.

US Pat. No. 9,431,891

SYSTEMS AND METHODS FOR TWO-LEVEL PROTECTION OF POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for protecting a power conversion system, the system controller comprising:
a two-level protection component configured to detect an output power of a power conversion system and generate a protection
signal based on at least information associated with the output power of the power conversion system; and

a driving component configured to generate a drive signal based on at least information associated with the protection signal
and output the drive signal to a switch associated with a primary current flowing through a primary winding of the power conversion
system;

wherein the driving component is further configured to:
generate the drive signal corresponding to a first switching frequency to generate the output power equal to a first power
threshold; and

generate the drive signal corresponding to a second switching frequency to generate the output power equal to a second power
threshold, the second power threshold being larger than the first power threshold, the second switching frequency being larger
than the first switching frequency;

wherein the two-level protection component is further configured to:
in response to the output power being equal to or larger than the first power threshold for a first predetermined period of
time, generate the protection signal to cause the switch to open and remain open to protect the power conversion system; and

in response to the output power being equal to or larger than the second power threshold for a second predetermined period
of time, generate the protection signal to cause the switch to open and remain open to protect the power conversion system,
the second predetermined period of time being shorter than the first predetermined period of time.

US Pat. No. 9,331,567

SYSTEMS AND METHODS FOR REDUCING ELECTROMAGNETIC INTERFERENCE USING SWITCHING FREQUENCY JITTERING

On-Bright Electronics (Sh...

1. A system for regulating a power converter, the system comprising:
a comparator configured to directly receive a first input signal and a second input signal and generate a comparison signal
based on at least information associated with the first input signal and the second input signal, the first input signal being
associated with at least a feedback signal related to an output voltage of a power converter, the second input signal including
a third input signal and being associated with at least a primary current flowing through a primary winding of the power converter;

a summation component configured to combine the third input signal and a current sensing signal to generate the second input
signal, the second input signal being a combination of the third input signal and the current sensing signal, the third input
signal and the current sensing signal being two separate signals, the third input signal being a voltage-jittering signal,
the current sensing signal being proportional in magnitude to the primary current; and

a driving component configured to receive the comparison signal and output a drive signal to a switch based on at least information
associated with the comparison signal, the drive signal being associated with a switching frequency related to the power converter
including the switch;

wherein:
the comparator and the driving component are configured to, in response to at least the third input signal, change a peak
value of the primary current within a first predetermined range and change the switching frequency of the power converter
within a second predetermined range; and

the peak value of the primary current is inversely proportional to the switching frequency of the power converter.

US Pat. No. 9,413,246

SYSTEMS AND METHODS FOR REGULATING POWER CONVERSION SYSTEMS WITH OUTPUT DETECTION AND SYNCHRONIZED RECTIFYING MECHANISMS

On-Bright Electronics (Sh...

19. A system for regulating a power conversion system, the system comprising:
a first system controller configured to:
receive an input signal associated with an output voltage related to a secondary winding of a power conversion system; and
generate a first drive signal based on at least information associated with the input signal to turn on or off a transistor
to affect a first current associated with the secondary winding of the power conversion system; and

a second system controller configured to:
receive a feedback signal associated with the first drive signal;
generate a second drive signal based on at least information associated with the feedback signal; and
output the second drive signal to a switch to affect a second current flowing through a primary winding of the power conversion
system;

wherein:
the first system controller is further configured to, in response to the input signal indicating that the output voltage changes
from a first value larger than a threshold to a second value smaller than the threshold, generate one or more pulses of the
first drive signal to turn on and off the transistor; and

the second system controller is further configured to:
process the feedback signal to detect the one or more pulses of the first drive signal; and
in response to the one or more pulses of the first drive signal being detected, increase a switching frequency associated
with the second drive signal;

wherein the second system controller includes:
a detection component configured to receive the feedback signal, detect the one or more pulses of the first drive signal based
on at least information associated with the feedback signal, and output a detection signal based on at least information associated
with the detected one or more pulses;

a signal generator configured to receive the detection signal and output a modulation signal based on at least information
associated with the detection signal; and

a drive component configured to receive the modulation signal and output the second drive signal to the switch.

US Pat. No. 9,397,550

SYSTEMS AND METHODS FOR OVER-TEMPERATURE PROTECTION AND OVER-VOLTAGE PROTECTION FOR POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

35. A method for protecting a power conversion system, the method comprising:
receiving an input current and a first current;
processing information associated with the input current and the first current;
generating a first voltage based on at least information associated with the first current and the input current;
receiving a second current;
processing information associated with the second current;
generating a second voltage based on at least information associated with the second current;
in response to the first voltage becoming larger than a first voltage threshold in magnitude,
increasing the second voltage in magnitude;
discharging a capacitor; and
decreasing a third voltage in magnitude associated with the capacitor;
providing a drive signal to close and open a switch to affect a third current flowing through a primary winding of a power
conversion system;

detecting the third voltage; and
in response to the third voltage being smaller in magnitude than a second voltage threshold, outputting a protection signal
to generate the drive signal to cause the switch to open and remain open to protect the power conversion system.

US Pat. No. 9,374,019

SYSTEMS AND METHODS FOR DISCHARGING AN AC INPUT CAPACITOR WITH AUTOMATIC DETECTION

On-Bright Electronics (Sh...

1. A system for discharging a capacitor, the system comprising: a signal detector configured to receive an input signal and
generate a detection signal based on at least information associated with the input signal, the input signal being associated
with an alternate current signal received by a capacitor including a first capacitor terminal and a second capacitor terminal;
and
a discharge control component configured to receive at least the detection signal and generate an output signal to discharge
the capacitor if the detection signal satisfies one or more conditions;

wherein:
the signal detector is further configured to, during a first predetermined time period, sample the input signal a first plurality
of times to generate a first plurality of sampled signals respectively and compare each sampled signal of the first plurality
of sampled signals with a first predetermined threshold; and

the discharge control component is further configured to, if the detection signal indicates that each sampled signal of the
first plurality of sampled signals is larger than the first predetermined threshold, generate the output signal to discharge
the capacitor.

US Pat. No. 9,257,964

LOW FREQUENCY OSCILLATOR FOR BURST-MODE DIMMING CONTROL FOR CCFL DRIVER SYSTEM

On-Bright Electronics (Sh...

1. An oscillator system, the system comprising:
a first digital-to-analog converter configured to receive a first current, a first clock signal and a second clock signal,
and to generate a second current, the first clock signal being associated with a first clock frequency corresponding to a
first clock period, the second clock signal being associated with a second clock frequency corresponding to a second clock
period; and

a first current comparator configured to process information associated with a third current and the second current and to
generate the second clock signal based on at least information associated with the third current and the second current;

wherein the first current comparator is further configured to:
in response to the second current being smaller than the third current in magnitude, provide the second clock signal at a
first voltage level; and

in response to the second current being larger than the third current in magnitude, provide the second clock signal at a second
voltage level;

wherein the first digital-to-analog converter is further configured to:
in response to the second clock signal changing from the first voltage level to the second voltage level, decrease the second
current in magnitude to a first predetermined current level; and

in response to the second clock signal not changing from the first voltage level to the second voltage level, increase the
second current in magnitude.

US Pat. No. 9,244,472

SYSTEMS AND METHODS FOR ENHANCING DYNAMIC RESPONSE OF POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:
an amplifier configured to receive a reference signal and a feedback signal associated with an output signal of the power
conversion system, the amplifier including an amplifier terminal;

a variable-resistance component associated with a variable resistance value, the variable-resistance component including a
first component terminal and a second component terminal, the first component terminal being coupled with the amplifier terminal;

a capacitor including a first capacitor terminal and a second capacitor terminal, the first capacitor terminal being coupled
with the second component terminal;

a modulation and drive component including a third component terminal and a fourth component terminal, the third component
terminal being coupled with the amplifier terminal, the modulation and drive component being configured to output a drive
signal at the fourth component terminal to a switch in order to affect the output signal of the power conversion system; and

a second capacitor including a third capacitor terminal and a fourth capacitor terminal, the third capacitor terminal being
coupled to the amplifier terminal;

wherein the system controller is configured to:
set the variable resistance value to a first resistance magnitude in order to operate in an on-off mode; and
set the variable resistance value to a second resistance magnitude in order to operate in an error amplifier mode;
wherein:
the first resistance magnitude is larger than the second resistance magnitude; and
the on-off mode is different from the error amplifier mode;
wherein:
the amplifier is configured to generate, with at least the variable-resistance component, a first signal based on at least
information associated with the feedback signal and the reference signal; and

the modulation and drive component is configured to receive the first signal and generate the drive signal based on at least
information associated with the first signal.

US Pat. No. 9,071,151

SYSTEMS AND METHODS FOR SOURCE SWITCHING AND VOLTAGE GENERATION

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:
a first controller terminal associated with a first controller voltage and coupled to a first transistor terminal of a first
transistor, the first transistor further including a second transistor terminal and a third transistor terminal, the second
transistor terminal being coupled to a primary winding of a power conversion system;

a second controller terminal associated with a second controller voltage and coupled to the third transistor terminal; and
a third controller terminal associated with a third controller voltage;
wherein:
the first controller voltage is equal to a sum of the third controller voltage and a first voltage difference; and
the second controller voltage is equal to a sum of the third controller voltage and a second voltage difference;
wherein the system controller is configured to:
keep the first voltage difference constant; and
change the second voltage difference to turn on or off the first transistor and to affect a primary current flowing through
the primary winding.

US Pat. No. 9,553,501

SYSTEM AND METHOD PROVIDING OVER CURRENT PROTECTION BASED ON DUTY CYCLE INFORMATION FOR POWER CONVERTER

On-Bright Electronics (Sh...

1. A signal generator for protecting a power converter, the signal generator comprising:
a modulation and drive component configured to generate a modulation signal to output a drive signal to a third switch in
order to affect a primary current flowing through a primary winding of the power converter;

a ramping-signal generator configured to receive the modulation signal and generate a ramping signal based on at least information
associated with the modulation signal;

a sampling-signal generator configured to receive the modulation signal and generate a sampling signal including a pulse in
response to a falling edge of the modulation signal;

a sample-and-hold component configured to receive the sampling signal and the ramping signal and output a sampled-and-held
signal associated with a magnitude of the ramping signal corresponding to the pulse of the sampling signal;

a comparator configured to receive a threshold signal associated with the sampled-and-held signal and a current sensing signal
associated with the primary current and output a comparison signal to the modulation and drive component based on at least
information associated with the sampled-and-held signal and the current sensing signal;

a low pass filter configured to receive the sampled-and-held signal and generate a filter signal based on at least information
associated with the sampled-and-held signal;

a duty-cycle detection and counter component configured to receive the modulation signal, detect duty cycles of the modulation
signal and generate a sample-enable signal based on at least information associated with the modulation signal, the modulation
signal being associated with one or more switching periods, the one or more switching periods corresponding to one or more
duty cycles;

a compensation component configured to receive the modulation signal and generate a compensation signal based on at least
information associated with the modulation signal;

a first switch coupled to the compensation component; and
a second switch coupled to the low pass filter;
wherein the duty-cycle detection and counter component is further configured to:
if a first duty cycle of the modulation signal corresponding to a first switching period is larger than a duty-cycle threshold,
generate the sample-enable signal at a first logic level; and

if second duty cycles of the modulation signal corresponding to second switching periods are smaller than the duty-cycle threshold,
generate the sample-enable signal at a second logic level, the second switching periods being a number of consecutive switching
periods;

wherein:
the first switch is configured, in response to the sample-enable signal being at the first logic level, to be closed to output
the compensation signal as the threshold signal; and

the second switch is configured, in response to the sample-enable signal being at the second logic level, to be closed to
output the filter signal as the threshold signal.

US Pat. No. 9,343,980

SYSTEMS AND METHODS FOR DYNAMIC THRESHOLD ADJUSTMENT WITH PRIMARY-SIDE SENSING AND REGULATION FOR FLYBACK POWER CONVERTERS

On-Bright Electronics (Sh...

20. A method for adjusting an effective threshold of a power converter, the method comprising:
receiving a first signal modulated at a switching frequency;
processing information associated with the first signal;
detecting a magnitude of the switching frequency of the first signal based on at least information associated with the first
signal;

generating a first current based on at least information associated with the detected magnitude of the switching frequency
of the first signal;

receiving a predetermined threshold voltage and a first voltage, the first voltage being a sum of a second voltage and a third
voltage;

generating a first comparison signal based on at least information associated with the predetermined threshold voltage and
the first voltage;

processing information associated with the first comparison signal; and
generating a drive signal based on at least information associated with the first comparison signal to affect a second current
flowing through a primary winding coupled to a secondary winding;

wherein, if the first voltage is larger than the predetermined threshold voltage in magnitude, the drive signal causes the
second current to decrease;

wherein:
the drive signal is associated with the switching frequency;
the second voltage increases with the increasing first current in magnitude and decreases with the decreasing first current
in magnitude; and

the third voltage increases with the increasing second current in magnitude and decreases with the decreasing second current
in magnitude;

wherein the first current decreases in response to the increasing switching frequency in magnitude and increases in response
to the decreasing switching frequency in magnitude.

US Pat. No. 9,362,737

SYSTEM AND METHOD PROVIDING PROTECTION IN THE EVENT OF CURRENT SENSING FAILURE FOR POWER CONVERTER

On-Bright Electronics (Sh...

1. A system for protecting a power converter, the system comprising:
a first comparator configured to receive a first threshold signal and a first signal and to generate a first comparison signal,
the first signal being associated with an input current for a power converter;

a second comparator configured to receive a second threshold signal and the first signal and to generate a second comparison
signal, the second threshold signal being different from the first threshold signal in magnitude;

a first detection component configured to receive at least the second comparison signal, detect the second comparison signal
only if one or more predetermined conditions are satisfied, and generate a first detection signal based on at least information
associated with the detected second comparison signal;

a switch signal generator coupled to at least the first detection component and configured to generate a switch signal for
controlling a switch for adjusting the input current for the power converter based on at least information associated with
the first comparison signal and the first detection signal; and

a second detection component configured to receive the first detection signal and output a second detection signal to the
switch signal generator;

wherein:
the switch signal generator is further configured to generate the switch signal to turn off the switch if the first comparison
signal indicates the first signal is larger than the first threshold signal in magnitude; and

the switch signal generator is further configured to generate the switch signal to turn off the switch if the first detection
signal indicates the first signal is smaller than the second threshold signal in magnitude;

wherein, if the first detection signal indicates the first signal is smaller than the second threshold signal in magnitude
for a predetermined period of time, the second detection component is further configured to output the second detection signal
causing the power converter to be shut down.

US Pat. No. 9,084,317

LED LIGHTING SYSTEMS AND METHODS FOR CONSTANT CURRENT CONTROL IN VARIOUS OPERATION MODES

On-Bright Electronics (Sh...

1. A system for providing at least an output current to one or more light emitting diodes, the system comprising:
a first signal processing component configured to receive at least a sensed signal and generate a first signal, the sensed
signal being associated with an inductor current flowing through an inductor coupled to a switch;

a second signal processing component configured to generate a second signal;
an integrator component configured to receive the first signal and the second signal and generate a third signal;
a comparator configured to process information associated with the third signal and the sensed signal and generate a comparison
signal based on at least information associated with the third signal and the sensed signal;

a signal generator configured to receive at least the comparison signal and generate a modulation signal; and
a gate driver configured to receive the modulation signal and output a drive signal to the switch;
wherein the drive signal is associated with at least one or more switching periods, each switching period of the one or more
switching periods including at least an on-time period for the switch and a demagnetization period for a demagnetization process;

wherein for the each switching period of the one or more switching periods,
the first signal represents a multiplication result of a first sum of the on-time period and the demagnetization period and
a second sum of a first current magnitude and a second current magnitude, the first current magnitude representing the inductor
current at the beginning of the on-time period, the second current magnitude representing the inductor current at the end
of the on-time period; and

the second signal represents the switching period multiplied by a predetermined current magnitude;
wherein:
the integrator component is further configured to integrate period-by-period differences between the first signal and the
second signal for a plurality of switching periods; and

the third signal represents the integrated period-by-period differences, the integrated period-by-period differences being
smaller than a predetermined threshold in magnitude.

US Pat. No. 9,154,038

SYSTEMS AND METHODS FOR ADJUSTING FREQUENCIES AND CURRENTS BASED ON LOAD CONDITIONS OF POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:
a driving component configured to output a driving signal to a switch associated with a first current flowing through a primary
winding of the power conversion system, the switch including a first switch terminal related to a first voltage and a second
switch terminal related to a second voltage, the driving signal being associated with a plurality of switching periods including
a first switching period and a second switching period; and

a detection component configured to receive an input signal associated with a difference between the first voltage and the
second voltage, detect at least one valley of the input signal in magnitude during a detection period for the first switching
period, and output a detection signal based on at least information associated with the input signal to affect the driving
signal;

wherein:
the driving component is further configured to, in response to the detection component detecting the at least one valley of
the input signal during the detection period for the first switching period, change the driving signal during the detection
period to end the first switching period and start the second switching period, the second switching period following the
first switching period; and

the detection period begins at an end of a first predetermined time period and ends at an end of a second predetermined time
period, the second predetermined time period being larger in duration than the first predetermined time period.

US Pat. No. 9,113,505

SYSTEMS AND METHODS FOR PROVIDING POWER TO HIGH-INTENSITY-DISCHARGE LAMPS

On-Bright Electronics (Sh...

1. A system for igniting one or more high-intensity-discharge lamps, the system comprising:
an ignition controller configured to generate one or more signal pulses for a pulse signal during a first predetermined time
period and to cause one or more voltage pulses to be applied to the one or more high-intensity-discharge lamps, the pulse
signal changing between a first logic level and a second logic level during the first predetermined time period, each of the
one or more signal pulses corresponding to a pulse period, the pulse period being no larger than the first predetermined time
period; and

a logic controller configured to generate one or more direction pulses for a direction signal during the first predetermined
time period to change a direction for a current associated with the one or more high-intensity-discharge lamps, the direction
signal changing between a third logic level and a fourth logic level during the first predetermined time period;

wherein the ignition controller is further configured to, if the one or more high-intensity-discharge lamps are not successfully
ignited after the first predetermined time period, stop generating any signal pulse for the pulse signal for a second predetermined
time period, the second predetermined time period being equal to or larger than the pulse period;

wherein:
the direction signal changes from the third logic level to the fourth logic level at the same time as the pulse signal changes
from the second logic level to the first logic level; and

the direction signal changes from the fourth logic level to the third logic level at the same time as the pulse signal changes
from the second logic level to the first logic level.

US Pat. No. 9,276,571

SYSTEMS AND METHODS FOR DRIVING TRANSISTORS WITH HIGH THRESHOLD VOLTAGES

On-Bright Electronics (Sh...

1. A system for driving a transistor, the system comprising:
a floating-voltage generator configured to receive a first bias voltage and generate a floating voltage, the floating-voltage
generator being further configured to change the floating voltage if the first bias voltage changes and to maintain the floating
voltage to be lower than the first bias voltage by a first predetermined value in magnitude;

a first driving circuit configured to receive an input signal, the first bias voltage and the floating voltage; and
a second driving circuit configured to receive the input signal, a second bias voltage and a third bias voltage, the first
driving circuit and the second driving circuit being configured to generate an output signal to drive a transistor;

wherein:
the first driving circuit includes a first driving transistor, the first driving transistor being configured to receive the
first bias voltage and a first gate signal, the first gate signal being associated with at least the input signal, the first
bias voltage, and the floating voltage;

the second driving circuit includes a second driving transistor, the second driving transistor being configured to receive
the third bias voltage and a second gate signal, the second gate signal being associated with at least the input signal, the
second bias voltage, and the third bias voltage; and

the first driving transistor and the second driving transistor are further configured to generate the output signal;
wherein:
if the first driving transistor is turned on by the first gate signal, the second driving transistor is turned off by the
second gate signal; and

if the first driving transistor is turned off by the first gate signal, the second driving transistor is turned on by the
second gate signal.

US Pat. No. 9,531,278

SYSTEMS AND METHODS FOR CURRENT CONTROL OF POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating an output current of a power conversion system, the system controller comprising:
a driving component configured to output a drive signal to a switch in order to affect a primary current flowing through a
primary winding of the power conversion system, the drive signal being associated with at least a switching period, the switching
period including an on-time period and an off-time period, the off-time period including a demagnetization period;

a demagnetization detector configured to receive a feedback signal associated with an output voltage of the power conversion
system and generate a detection signal based on at least information associated with the feedback signal, the detection signal
indicating the demagnetization period, the switch being closed during the on-time period, the switch being open during the
demagnetization period, the detection signal being different from the drive signal;

a current-regulation component configured to:
receive the drive signal;
receive the detection signal, the detection signal indicating the demagnetization period and being different from the drive
signal;

receive a current-sensing signal, the current-sensing signal representing the primary current flowing through a primary winding
in magnitude; and

output a current-regulation signal based on at least information associated with the drive signal, the detection signal, and
the current sensing signal; and

a signal processing component configured to receive the current-regulation signal and output a processed signal to the driving
component in order to generate the drive signal.

US Pat. No. 9,369,096

AMPLIFICATION SYSTEMS AND METHODS WITH ONE OR MORE CHANNELS

On-Bright Electronics (Sh...

1. A system for amplifying multiple input signals to generate multiple output signals, the system comprising:
a first channel including a first loop filter, a first signal processing component and a first output component, and configured
to receive multiple first input signals and generate multiple first output signals based at least in part on the multiple
first input signals and a ramp signal; and

a second channel including a second loop filter, a second signal processing component and a second output component, and configured
to receive multiple second input signals and generate multiple second output signals based at least in part on the multiple
second input signals and the ramp signal;

wherein:
the first loop filter is configured to generate multiple first filtered signals based at least in part on the multiple first
input signals;

the first signal processing component is configured to generate multiple first processed signals based at least in part on
the multiple first filtered signals;

the first output component is configured to generate the multiple first output signals based on at least information associate
with the multiple first processed signals;

the second loop filter is configured to generate multiple second filtered signals based at least in part on the multiple second
input signals;

the second signal processing component is configured to generate multiple second processed signals based at least in part
on the multiple second filtered signals;

and
the second output component is configured to generate the multiple second output signals based on at least information associate
with the multiple second processed signals;

wherein:
at least one first processed signal of the multiple first processed signals is associated with a first phase;
at least one second processed signal of the multiple second processed signals is associated with a second phase; and
a difference between the first phase and the second phase is equal to 180 degrees.

US Pat. No. 9,379,623

SYSTEMS AND METHODS FOR DYNAMIC THRESHOLD ADJUSTMENT WITH PRIMARY-SIDE SENSING AND REGULATION FOR FLYBACK POWER CONVERTERS

On-Bright Electronics (Sh...

20. A method for adjusting an effective threshold of a power converter, the method comprising:
receiving a first signal modulated at a switching frequency;
processing information associated with the first signal;
detecting a magnitude of the switching frequency of the first signal based on at least information associated with the first
signal;

generating a first current based on at least information associated with the detected magnitude of the switching frequency
of the first signal;

receiving a predetermined threshold voltage and a first voltage, the first voltage being a sum of a second voltage and a third
voltage;

generating a first comparison signal based on at least information associated with the predetermined threshold voltage and
the first voltage;

processing information associated with the first comparison signal; and
generating a drive signal based on at least information associated with the first comparison signal to affect a second current
flowing through a primary winding coupled to a secondary winding;

wherein, if the first voltage is larger than the predetermined threshold voltage in magnitude, the drive signal causes the
second current to decrease;

wherein:
the drive signal is associated with the switching frequency;
the second voltage increases with the increasing first current in magnitude and decreases with the decreasing first current
in magnitude; and

the third voltage increases with the increasing second current in magnitude and decreases with the decreasing second current
in magnitude;

wherein the first current decreases in response to the increasing switching frequency in magnitude and increases in response
to the decreasing switching frequency in magnitude.

US Pat. No. 9,350,252

SYSTEMS AND METHODS FOR PROTECTING POWER CONVERSION SYSTEMS BASED ON AT LEAST FEEDBACK SIGNALS

On-Bright Electronics (Sh...

1. A system controller for protecting a power conversion system, the system controller comprising:
a protection component configured to receive a demagnetization signal generated based on at least information associated with
a feedback signal of the power conversion system, process information associated with the demagnetization signal and a detected
voltage generated based on the at least information associated with the feedback signal, and generate a protection signal
based on at least information associated with the detected voltage and the demagnetization signal; and

a driving component configured to receive the protection signal and output a driving signal to a switch configured to affect
a primary current flowing through a primary winding of the power conversion system;

wherein:
the detected voltage is related to an output voltage of the power conversion system; and
the demagnetization signal is related to a demagnetization period of the power conversion system;
wherein the protection component and the driving component are further configured to, if the detected voltage and the demagnetization
signal satisfy one or more conditions, output the driving signal to cause the switch to open and remain open in order to protect
the power conversion system;

wherein the protection component and the driving component are further configured to, in response to at least the detected
voltage and the demagnetization signal not satisfying the one or more conditions, output the driving signal as a modulation
signal to turn on and turn off the switch within a switching period corresponding to a modulation frequency.

US Pat. No. 9,325,234

SYSTEMS AND METHODS FOR PROTECTING POWER CONVERSION SYSTEMS FROM THERMAL RUNAWAY

On-Bright Electronics (Sh...

1. A system controller for protecting a power conversion system, the system controller comprising:
a protection component configured to receive a feedback signal, a reference signal, and a demagnetization signal generated
based on at least information associated with the feedback signal, process information associated with the feedback signal,
the reference signal, and the demagnetization signal, and generate a protection signal based on at least information associated
with the feedback signal, the reference signal, and the demagnetization signal, the demagnetization signal being related to
multiple demagnetization periods of the power conversion system, the multiple demagnetization periods including a first demagnetization
period and a second demagnetization period; and

a driving component configured to receive the protection signal and output a drive signal to a switch configured to affect
a current flowing through a primary winding of the power conversion system;

wherein the protection component is further configured to:
process information associated with the feedback signal and the reference signal during a first detection period, the first
detection period including a first starting time and a first ending time, the first starting time being at or after a first
demagnetization end of the first demagnetization period;

determine, during the first detection period, a first number of times that the feedback signal changes from being smaller
than the reference signal to being larger than the reference signal in magnitude; and

determine whether the first number of times exceeds a predetermined threshold at the first ending time;
wherein the protection component and the driving component are further configured to, in response to the first number of times
not exceeding the predetermined threshold at the first ending time, output the drive signal to cause the switch to open and
remain open in order to protect the power conversion system.

US Pat. No. 9,414,455

SYSTEMS AND METHODS FOR DIMMING CONTROL WITH CAPACITIVE LOADS

On-Bright Electronics (Sh...

1. A system for dimming control, the system comprising:
a system controller including a first controller terminal and a second controller terminal;
a transistor including a first transistor terminal, a second transistor terminal and a third transistor terminal; and
a resistor including a first resistor terminal and a second resistor terminal;
wherein:
the system controller is configured to generate a first signal at the first controller terminal based at least in part on
an input signal and to generate a second signal at the second controller terminal based at least in part on the first signal;

the first resistor terminal is coupled to the second transistor terminal;
the second resistor terminal is coupled to the third transistor terminal; and
the transistor is configured to receive the second signal at the first transistor terminal and to change between a first condition
and a second condition in response to the second signal;

wherein:
the first signal is at a first logic level during a first period of time and changes between the first logic level and a second
logic level during a second period of time, the second period of time including a third period of time and a fourth period
of time;

the second signal keeps at the second logic level during the first period of time and the third period of time; and
the second signal changes from the second logic level to the first logic level after the third period of time and remains
at the first logic level during the fourth period of time.

US Pat. No. 9,595,874

SYSTEMS AND METHODS FOR REGULATING POWER CONVERSION SYSTEMS WITH OUTPUT DETECTION AND SYNCHRONIZED RECTIFYING MECHANISMS

On-Bright Electronics (Sh...

12. A system controller for regulating a power conversion system, the system controller comprising:
a first controller terminal;
a second controller terminal;
a first comparator configured to generate a first comparison signal based on at least information associated with an input
signal, the first comparison signal indicating whether the input signal is larger than a first threshold;

a debounce component configured to receive the first comparison signal and generate a debounce signal based at least in part
on the first comparison signal, the debounce signal indicating whether the input signal remains larger than the first threshold
for a time period that is longer than a predetermined duration;

a second comparator configured to, in response to the input signal having remained larger than the first threshold for the
time period that is longer than the predetermined duration, generate a second comparison signal based on at least information
associated with the input signal, the second comparison signal indicating whether the input signal is smaller than a second
threshold at a time following the time period; and

a driving component configured to output a drive signal at the second controller terminal based at least in part on the second
comparison signal;

wherein the system controller is configured to:
receive the input signal at the first controller terminal; and
generate the drive signal at the second controller terminal based at least in part on the input signal to turn on or off a
transistor in order to affect a current associated with a secondary winding of the power conversion system;

wherein the system controller is further configured to:
determine whether the input signal remains larger than the first threshold for the time period that is longer than the predetermined
duration;

in response to the input signal being determined to have remained larger than the first threshold for the time period that
is longer than the predetermined duration,

determine whether the input signal is smaller than the second threshold at the time;
in response to the input signal being determined to be smaller than the second threshold at the time, change the drive signal
at the second controller terminal from a first logic level to a second logic level.

US Pat. No. 9,583,935

SYSTEMS AND METHODS FOR PROTECTING POWER CONVERSION SYSTEMS UNDER OPEN AND/OR SHORT CIRCUIT CONDITIONS

On-Bright Electronics (Sh...

1. A system for protecting a power converter, the system comprising:
a first comparator configured to receive a sensing signal and a first threshold signal and generate a first comparison signal
based on at least information associated with the sensing signal and the first threshold signal, the sensing signal being
associated with at least a primary current flowing through a primary winding and a switch of the power converter, the power
converter being associated with a switching frequency; and

an off-time component configured to receive the first comparison signal and generate an off-time signal based on at least
information associated with the first comparison signal;

wherein the off-time component is further configured to, if the first comparison signal indicates the sensing signal associated
with at least the primary current flowing through the primary winding and the switch of the power converter is larger than
the first threshold signal in magnitude, generate the off-time signal to keep the switch to be turned off for at least a predetermined
period of time, the predetermined period of time extending beyond at least a beginning of a next switching period corresponding
to the switching frequency.

US Pat. No. 9,577,536

SYSTEM AND METHOD PROVIDING RELIABLE OVER CURRENT PROTECTION FOR POWER CONVERTER

On-Bright Electronics (Sh...

1. A system controller for protecting a power converter, the system controller comprising:
a first controller terminal configured to output a drive signal to a switch to affect a first current flowing through a primary
winding of a power converter, the power converter further including a secondary winding coupled to the primary winding, the
drive signal being associated with one or more switching periods; and

a second controller terminal configured to receive a sensing voltage from a sensing resistor, the sensing voltage representing
a magnitude of the first current flowing through the primary winding of the power converter;

wherein the system controller is configured to:
process information associated with the sensing voltage and a reference voltage;
determine whether an average output current of the power converter is larger than a current threshold, the average output
current of the power converter being related to a second current flowing through the secondary winding; and

in response to the average output current being larger than the threshold current, generate the drive signal to cause the
switch open and remain open to protect the power converter;

wherein the current threshold is equal to a first ratio multiplied by a second ratio, the first ratio being equal to a first
number of turns of the primary winding divided by a second number of turns of the secondary winding, the second ratio being
equal to the reference voltage divided by a resistance of the sensing resistor.

US Pat. No. 9,379,624

SYSTEMS AND METHODS FOR PEAK CURRENT ADJUSTMENTS IN POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating an output of a power conversion system, the system controller comprising:
a signal generator configured to receive at least a first signal indicating a magnitude of an input voltage received by a
primary winding of a power conversion system, receive a second signal indicating a magnitude of a primary current flowing
through the primary winding, and generate a third signal; and

a modulation and drive component configured to receive at least the third signal, generate a drive signal based on at least
information associated with the third signal, and output the drive signal to a switch to affect the primary current;

wherein the signal generator and the modulation and drive component are further configured to, if an output voltage of the
power conversion system is regulated in a constant-voltage mode,

if an output current of the power conversion system falls within a first predetermined range, generate, without taking into
account the magnitude of the primary current flowing through the primary winding, a modulation signal as the drive signal
based on at least information associated with the magnitude of the input voltage; and

if the output current falls within a second predetermined range, generate, without taking into account the magnitude of the
input voltage, the modulation signal as the drive signal based on at least information associated with the magnitude of the
primary current.

US Pat. No. 9,301,349

SYSTEMS AND METHODS FOR DIMMING CONTROL USING SYSTEM CONTROLLERS

On-Bright Electronics (Sh...

1. A system controller for dimming control, the system controller comprising:
a first controller terminal; and
a second controller terminal;
wherein the system controller is configured to:
receive an input signal at the first controller terminal and generate a dimming signal based on at least information associated
with the input signal;

generate a synchronization signal based on at least information associated with the dimming signal; and
output a gate drive signal at the second controller terminal based on at least information associated with the synchronization
signal;

wherein the system controller is further configured to:
generate a first pulse of the synchronization signal in response to a first rising edge of the dimming signal, the first pulse
including a first falling edge and being associated with a first pulse width; and

start changing the gate drive signal between a first logic level and a second logic level for a first burst period at the
first falling edge of the pulse.

US Pat. No. 9,343,999

SYSTEMS AND METHODS FOR DISCHARGING AN AC INPUT CAPACITOR WITH AUTOMATIC DETECTION

On-Bright Electronics (Sh...

1. A system for discharging a capacitor, the system comprising: a signal detector configured to receive an input signal and
generate a detection signal based on at least information associated with the input signal, the input signal being associated
with an alternate current signal received by a capacitor including a first capacitor terminal and a second capacitor terminal;
and
a discharge control component configured to receive at least the detection signal and generate an output signal to discharge
the capacitor if the detection signal satisfies one or more conditions;

wherein:
the signal detector is further configured to, during a first predetermined time period, sample the input signal a first plurality
of times to generate a first plurality of sampled signals respectively and compare each sampled signal of the first plurality
of sampled signals with a first predetermined threshold; and

the discharge control component is further configured to, if the detection signal indicates that each sampled signal of the
first plurality of sampled signals is larger than the first predetermined threshold, generate the output signal to discharge
the capacitor.

US Pat. No. 9,570,986

SYSTEMS AND METHODS FOR REGULATING OUTPUT CURRENTS OF POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:
a jittering-signal generator configured to generate a jittering signal associated with multiple jittering cycles corresponding
to a predetermined jittering frequency related to a predetermined jittering period;

a ramp-signal generator configured to receive the jittering signal and generate a ramping signal based on at least information
associated with the jittering signal, the ramping signal being associated with a ramping slope;

a first controller terminal configured to provide a compensation signal based on at least information associated with a first
current flowing through a primary winding of a power conversation system;

a comparator configured to receive the ramping signal and the compensation signal and output a comparison signal based on
at least information associated with the ramping signal and the compensation signal; and

a driving component configured to generate a drive signal based on at least information associated with the comparison signal
and output the drive signal to a switch to affect the first current, the drive signal being associated with multiple modulation
cycles corresponding to a modulation frequency related to a modulation period;

wherein the system controller is further configured to:
change the ramping slope based on at least information associated with the jittering signal so that, within a same jittering
cycle of the multiple jittering cycles, the ramping slope is changed by different magnitudes corresponding to the multiple
modulation cycles respectively; and

adjust the modulation frequency based on at least information associated with the changed ramping slope.

US Pat. No. 9,570,903

SYSTEMS AND METHODS FOR PROTECTING POWER CONVERSION SYSTEMS UNDER OPEN AND/OR SHORT CIRCUIT CONDITIONS

On-Bright Electronics (Sh...

1. A system for protecting a power converter, the system comprising:
a first comparator configured to receive a sensing signal and a first threshold signal and generate a first comparison signal
based at least in part on the sensing signal and the first threshold signal, the sensing signal being associated with a first
current flowing through a primary winding of a power converter, the power converter being associated with a switching frequency
and including a switch configured to affect the first current;

a timing component configured to receive an input signal and generate a timing signal; and
a detection component configured to receive the timing signal, to detect the first comparison signal at a first detection
time in response to the timing signal, and to generate a second signal based at least in part on the first comparison signal,
the first detection time following, by a first delay period, a time when the switch is turned on;

wherein the detection component is further configured to, in response to the sensing signal being smaller than the first threshold
signal in magnitude, generate the second signal to keep the switch to be turned off for at least a predetermined period of
time, the predetermined period of time extending beyond at least a beginning of a next switching period corresponding to the
switching frequency.

US Pat. No. 9,584,005

SYSTEMS AND METHODS FOR REGULATING OUTPUT CURRENTS OF POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:
a signal generator configured to receive a converted signal and a first compensation signal and generate a second compensation
signal based at least in part on the converted signal and the first compensation signal, the converted signal being associated
with an input signal for a power conversion system, the first compensation signal being associated with a sensing signal related
to a first current flowing through a primary winding of the power conversion system;

a modulation component configured to receive the second compensation signal and a ramping signal and generate a modulation
signal based at least in part on the second compensation signal and the ramping signal; and

a drive component configured to receive the modulation signal and output a drive signal based at least in part on the modulation
signal to a switch to affect the first current, the drive signal being associated with an on-time period, the switch being
closed during the on-time period;

wherein the system controller is configured to adjust a duration of the on-time period based at least in part on the converted
signal and the second compensation signal.

US Pat. No. 9,577,537

SYSTEMS AND METHODS FOR LOAD COMPENSATION WITH PRIMARY-SIDE SENSING AND REGULATION FOR FLYBACK POWER CONVERTERS

On-Bright Electronics (Sh...

1. A system for regulating an output voltage of a power converter, the system comprising:
a sample-and-hold circuit located on a chip configured to receive an input voltage through a terminal, the sample-and-hold
circuit being configured to sample the input voltage, hold the sampled input voltage, and generate a sampled-and-held voltage;

an error amplifier configured to process information associated with the sampled-and- held voltage and a threshold voltage
and generate a first output signal;

a first signal generator configured to generate a second output signal and one or more third output signals;
a comparator configured to receive the first output signal and the second output signal and generate a comparison signal;
a driver coupled to the comparator and configured to generate a drive signal based on at least information associated with
the comparison signal; and

a current generator configured to receive the one or more third output signals and generate a compensation current flowing
out of the chip through the terminal;

wherein:
the driver is further coupled to a first switch configured to receive the drive signal and affect a first current flowing
through a primary winding coupled to a secondary winding;

the secondary winding is associated with at least an output voltage of a power converter, the power converter including the
primary winding, the secondary winding, and an auxiliary winding, the auxiliary winding being coupled to the secondary winding;
and

the input voltage is associated with at least the auxiliary winding and depends on at least the output voltage and the compensation
current; wherein:

the second output signal starts to increase from a first magnitude at a first time;
the one or more third output signals represent a first time period during which the second output signal increases in magnitude;
and

the compensation current decreases in magnitude in response to a second time period increasing, the second time period starting
from the first time and ending at a second time when the second output signal becomes equal to the first output signal in
magnitude.

US Pat. No. 9,564,811

SYSTEMS AND METHODS FOR REGULATING OUTPUT CURRENTS OF POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system contoller comprising:
a first controller terminal configured to receive a first signal associated with an input signal for a primary winding of
the power conversation system;

a second controller terminal configured to output a drive signal to a switch to affect a first current flowing through the
primary winding of the power conversion system, the drive signal being associated with an on-time period, the switch being
closed during the on-time period;

a first conversion component configured to generate a second current based on at least information associated with the first
signal; and

a ramp-signal generator configured to generate a ramping signal based on at least information associated with the second current,
the ramping signal being associated with a ramping slope;

wherein the system controller is configured to adjust a duration of the on-time period based on at least information associated
with the first signal;

wherein the system controller is further configured to adjust the duration of the on-time period by adjusting the ramping
slope of the ramping signal based on at least information associated with the first signal.

US Pat. No. 9,794,997

LED LIGHTING SYSTEMS AND METHODS FOR CONSTANT CURRENT CONTROL IN VARIOUS OPERATION MODES

On-Bright Electronics (Sh...

1. A system for providing at least an output current to one or more light emitting diodes, the system comprising:
a signal-amplification and voltage-to-current-conversion component configured to receive at least a sensed signal and generate
a first current signal, the sensed signal being associated with an inductor current flowing through an inductor coupled to
a first switch;

a current-signal generator configured to generate a second current signal;
a capacitor coupled to the current-signal generator, and coupled through a second switch to the signal-amplification and voltage-to-current-conversion
component, the capacitor being configured to generate a voltage signal;

a comparator configured to process information associated with the voltage signal and the sensed signal and generate a comparison
signal based on at least information associated with the voltage signal and the sensed signal;

a modulation-signal generator configured to receive at least the comparison signal and generate a modulation signal; and
a gate driver configured to receive the modulation signal and output a drive signal to the first switch;
wherein:
the drive signal is associated with at least one or more switching periods, each of the one or more switching periods including
at least an on-time period for the first switch; and

the first current signal represents the inductor current;
wherein for each of the one or more switching periods,
the first current signal is configured to discharge or charge the capacitor during only the on-time period; and
the second current signal is configured to charge or discharge the capacitor during only the on-time period.

US Pat. No. 9,712,065

SYSTEMS AND METHODS FOR SOURCE SWITCHING AND VOLTAGE GENERATION

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:
a first controller terminal associated with a first controller voltage and coupled to a first transistor terminal of a first
transistor, the first transistor further including a second transistor terminal and a third transistor terminal, the second
transistor terminal being coupled to a primary winding of the power conversion system;

a second controller terminal associated with a second controller voltage and coupled to the third transistor terminal;
a third controller terminal associated with a third controller voltage;
a second transistor including a fourth transistor terminal, a fifth transistor terminal and a sixth transistor terminal, the
fifth transistor terminal being coupled to the second controller terminal; and

a first clamper including a first clamper terminal and a second clamper terminal, the first clamper terminal being coupled
to the first controller terminal;

wherein:
the second controller voltage is equal to a sum of the third controller voltage and a first voltage difference; and
the second transistor is configured to change the first voltage difference to turn on or off the first transistor and to affect
a current flowing through the primary winding.

US Pat. No. 9,654,072

AMPLIFICATION SYSTEMS AND METHODS WITH OUTPUT REGULATION

On-Bright Electronics (Sh...

1. A system for amplifying multiple input signals to generate multiple output signals, the system comprising:
a first channel configured to receive a first input signal and a second input signal and generate a first output signal and
a second output signal based at least in part on the first input signal and the second input signal; and

a second channel configured to receive a third input signal and a fourth input signal and generate a third output signal and
a fourth output signal based at least in part on the third input signal and the fourth input signal;

wherein:
a first differential signal is equal to the first input signal minus the second input signal; and
a second differential signal is equal to the third input signal minus the fourth input signal;
wherein:
the first output signal corresponds to a first phase;
the second output signal corresponds to a second phase;
the third output signal corresponds to a third phase; and
the fourth output signal corresponds to a fourth phase;
wherein:
a first phase difference is equal to the first phase minus the third phase; and
a second phase difference is equal to the second phase minus the fourth phase;
wherein:
the first differential signal and the second differential signal are the same;
the first phase difference is not equal to zero;
the second phase difference is not equal to zero; and
the first phase difference and the second phase difference are the same.

US Pat. No. 9,614,445

SYSTEMS AND METHODS FOR HIGH PRECISION AND/OR LOW LOSS REGULATION OF OUTPUT CURRENTS OF POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. An error amplifier for processing a reference signal and an input signal associated with a current of a power conversion
system, the error amplifier comprising:
a first operational amplifier including a first input terminal, a second input terminal and a first output terminal, the first
input terminal being configured to receive a reference signal;

a first transistor including a first transistor terminal, a second transistor terminal and a third transistor terminal, the
first transistor terminal being configured to receive a first amplified signal from the first output terminal, the third transistor
terminal being coupled to the second input terminal;

a second operational amplifier including a third input terminal, a fourth input terminal and a second output terminal, the
third input terminal being configured to receive an input signal associated with a first current flowing through a primary
winding of a power conversion system;

a second transistor including a fourth transistor terminal, a fifth transistor terminal and a sixth transistor terminal, the
fourth transistor terminal being configured to receive a second amplified signal from the second output terminal, the sixth
transistor terminal being coupled to the fourth input terminal;

a current mirror component including a first component terminal and a second component terminal, the first component terminal
being coupled to the second transistor terminal;

a switch including a first switch terminal and a second switch terminal, the first switch terminal being coupled to the second
component terminal, the second switch terminal being coupled to the fifth transistor terminal;

a first resistor including a first resistor terminal and a second resistor terminal, the first resistor being associated with
a first resistance, the first resistor terminal being coupled to the second input terminal; and

a second resistor including a third resistor terminal and a fourth resistor terminal, the second resistor being associated
with a second resistance, the third resistor terminal being coupled to the fourth input terminal;

wherein:
the first resistance is larger than the second resistance in magnitude; and
the second component terminal is configured to output a first output signal based on at least information associated with
the reference signal and the input signal.

US Pat. No. 9,750,107

SYSTEMS AND METHODS FOR INTELLIGENT DIMMING CONTROL USING TIRAC DIMMERS

On-Bright Electronics (Sh...

1. An apparatus for a power conversion system, the apparatus comprising:
a process-and-drive component configured to receive an input signal associated with a TRIAC dimmer and output a drive signal
to a switch to affect a current that flows through a primary winding of a power conversion system;

wherein:
the input signal includes a first pulse corresponding to a first input period, the first pulse being associated with a first
pulse width; and

the first pulse width is larger than a first threshold for normal operation of the TRIAC dimmer;
wherein the process-and-drive component is further configured to:
process information associated with the first pulse width and a second threshold, the second threshold being larger than the
first threshold; and

in response to the first pulse width being smaller than the second threshold, even if the first pulse width is still larger
than the first threshold, maintain the drive signal at a first logic level without modulation to keep the switch open during
at least the first input period.

US Pat. No. 9,585,222

SYSTEMS AND METHODS FOR INTELLIGENT DIMMING CONTROL USING TRIAC DIMMERS

On-Bright Electronics (Sh...

1. An apparatus for a power conversion system, the apparatus comprising:
a process-and-drive component configured to receive an input signal, process information associated with the input signal,
and output a drive signal to a switch to affect a current that flows through a primary winding of a power conversion system;

wherein:
the input signal includes a first pulse associated with a first input period and a second pulse associated with a second input
period; and

the drive signal is associated with a first modulation period for the first input period and a second modulation period for
the second input period;

wherein the process-and-drive component is further configured to:
determine the first modulation period for the first input period;
change the drive signal between a first logic level and a second logic level at a modulation frequency during the first modulation
period;

determine the second modulation period for the second input period; and
change the drive signal between the first logic level and the second logic level at the modulation frequency during the second
modulation period;

wherein:
the first pulse corresponds to a first pulse width;
the second pulse corresponds to a second pulse width;
the first modulation period corresponds to a first duration; and
the second modulation period corresponds to a second duration;
wherein:
the first pulse width and the second pulse width are different in magnitude; and
the first duration and the second duration are equal in magnitude;
wherein the process-and-drive component includes:
a reference signal generator configured to receive the input signal and generate a reference signal based on at least information
associated with the input signal;

an error amplifier configured to receive the reference signal and a current sensing signal and generate an amplified signal
based on at least information associated with the reference signal and the current sensing signal;

a modulation component configured to generate a modulation signal based on at least information associated with the amplified
signal; and

a drive component configured to generate the drive signal based on at least information associated with the modulation signal.

US Pat. No. 9,872,347

SYSTEMS AND METHODS FOR CURRENT REGULATION IN LIGHT-EMITTING-DIODE LIGHTING SYSTEMS

On-Bright Electronics (Sh...

1. A system controller comprising:
a first controller terminal configured to allow a first current to flow out of the system controller through the first controller
terminal to a resistor associated with a resistance, the first controller terminal being further configured to receive a voltage
signal based at least in part on the first current and the resistance, the resistor not being any part of the system controller;
and

a ramp signal generator configured to receive the voltage signal and generate a ramp signal based at least in part on the
voltage signal;

wherein the system controller is configured to process the received voltage signal, generate a clock signal associated with
an operating frequency based at least in part on the voltage signal, and change the operating frequency based at least in
part on the resistance;

wherein:
the ramp signal is associated with the operating frequency corresponding to an operating period;
the operating period includes a ramp-up period and a ramp-down period;
the ramp signal ramps up from a first magnitude to a second magnitude during the ramp-up period and ramps down from the second
magnitude to the first magnitude during the ramp-down period, the first magnitude and the second magnitude being different;

wherein the ramp signal generator is further configured to adjust a duration of the ramp-down period in response to a change
of the voltage signal in magnitude.

US Pat. No. 9,647,448

SYSTEM AND METHOD PROVIDING OVER CURRENT AND OVER POWER PROTECTION FOR POWER CONVERTER

On-Bright Electronics (Sh...

1. A system for protecting a power converter, the system comprising:
a voltage generator configured to generate a first voltage signal, the first voltage signal being associated with a first
voltage magnitude;

a processing component including one or more comparators, the processing component configured to receive the first voltage
signal and an input signal and to generate an output signal, the input signal being associated with an input current for the
power converter; and

a pulse-width-modulation generator configured to receive the output signal, generate a modulation signal based on at least
information associated with the output signal, and output the modulation signal to a switch to adjust the input current for
the power converter;

wherein:
the processing component is further configured to generate the output signal in a first logic state in response to an input
magnitude for the input signal being larger than an effective threshold magnitude, and to generate the output signal in a
second logic state in response to the input magnitude being smaller than the effective threshold magnitude;

the first logic state and the second logic state are different;
the effective threshold magnitude remains constant during a first substantial period of time;
the effective threshold magnitude changes linearly with time at a slope during a second substantial period of time, the slope
being not equal to zero;

the effective threshold magnitude remains constant during a third substantial period of time;
the processing component is further configured to receive a second voltage signal, the second voltage signal being associated
with a second voltage magnitude; and

the effective threshold magnitude is equal to the second voltage magnitude during the third substantial period of time.

US Pat. No. 9,692,306

SYSTEMS AND METHODS FOR VOLTAGE REGULATION OF PRIMARY SIDE REGULATED POWER CONVERSION SYSTEMS WITH COMPENSATION MECHANISMS

On-Bright Electronics (Sh...

1. A system controller for a power conversion system, the system controller comprising:
a sampling component configured to sample a sensing signal and determine a compensation signal based at least in part on the
sensing signal, the sensing signal being associated with a first current flowing through a primary winding of a power conversion
system;

a signal processing component configured to receive a feedback signal and the compensation signal and generate a first signal
based at least in part on the feedback signal and the compensation signal, the feedback signal being associated with an auxiliary
winding coupled with a secondary winding of the power conversion system;

an error amplifier configured to receive the first signal and a reference signal and generate an amplified signal based at
least in part on the first signal and the reference signal;

a modulation component configured to receive the amplified signal and generate a modulation signal based at least in part
on the amplified signal; and

a driver component configured to receive the modulation signal and output a drive signal based at least in part on the modulation
signal to close or open a switch to affect the first current;

wherein the system controller is configured to change the drive signal based on at least information associated with the compensation
signal in order to adjust a winding voltage of the secondary winding and to at least partially compensate for a change in
a forward voltage of a rectifying diode associated with the secondary winding.

US Pat. No. 9,641,082

SYSTEMS AND METHODS FOR ZERO VOLTAGE SWITCHING IN POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating a power converter, the system controller comprising:
a signal generator configured to generate a first signal for a first switch and generate a second signal for a second switch,
the first switch being coupled to a first winding of a power converter, the second switch being coupled to a second winding
of the power converter;

wherein the system controller is configured to:
change, at a first time, the second signal to open the second switch;
maintain, from the first time to a second time, the first signal to keep the first switch open; and
change, at the second time, the first signal to close the first switch;
wherein the system controller is further configured to:
change, at a third time, the first signal to open the first switch;
maintain, from the third time to a fourth time, the second signal to keep the second switch open; and
change, at the fourth time, the second signal to close the second switch.

US Pat. No. 9,961,734

SYSTEMS AND METHODS FOR DIMMING CONTROL USING TRIAC DIMMERS

ON-BRIGHT ELECTRONICS (SH...

1. A system for dimming control of one or more light emitting diodes, the system comprising:a first comparator configured to receive a first threshold signal and an input signal associated with a TRIAC dimmer and generate a comparison signal based on at least information associated with the first threshold signal and the input signal;
a driving component configured to receive the comparison signal, generate an output signal based on at least information associated with the comparison signal, and send the output signal to a switch;
a modulation component configured to receive a current sensing signal associated with a primary current flowing through a primary winding of a transformer and a third signal associated with the input signal and output a modulation signal to the driving component based on at least information associated with the current sensing signal and the third signal, the transformer further including a secondary winding and an auxiliary winding;
a multiplexer configured to receive the input signal and a fourth signal and generate a fifth signal based on at least information associated with the input signal and the fourth signal; and
an offset component configured to receive the fifth signal and output the third signal by adding a predetermined offset to the fifth signal to cause the third signal to be larger than the current sensing signal in magnitude when the input signal is smaller than the first threshold signal in magnitude;
wherein:
the first comparator is further configured to generate the comparison signal at a first logic level if the input signal is larger than the first threshold signal in magnitude and generate the comparison signal at a second logic level if the input signal is smaller than the first threshold signal in magnitude; and
the driving component is further configured to generate the output signal and cause the switch to remain closed for a period of time until at least the comparison signal changes from the second logic level to the first logic level;
wherein the modulation component is further configured to:
if the current sensing signal is larger than the third signal in magnitude, generate the modulation signal at a third logic level to cause the switch to be opened; and
if the current sensing signal is smaller than the third signal in magnitude, generate the modulation signal at a fourth logic level to cause the switch to be closed.

US Pat. No. 9,900,943

TWO-TERMINAL INTEGRATED CIRCUITS WITH TIME-VARYING VOLTAGE-CURRENT CHARACTERISTICS INCLUDING PHASED-LOCKED POWER SUPPLIES

On-Bright Electronics (Sh...

1. A two-terminal IC chip, the chip comprising:
a first chip terminal;
a second chip terminal;
a first switch configured to receive a control signal;
a first capacitor coupled to the first switch;
a second switch configured to receive the control signal;
a second capacitor coupled to the second switch;
a third switch configured to receive the control signal; and
a third capacitor coupled to the third switch;
wherein:
a first terminal voltage is a voltage of the first chip terminal;
a second terminal voltage is a voltage of the second chip terminal; and
a chip voltage is equal to a difference between the first terminal voltage and the second terminal voltage;
wherein the chip is configured to allow a chip current to flow into the chip at the first chip terminal and out of the chip
at the second chip terminal, or to flow into the chip at the second chip terminal and out of the chip at the first chip terminal,
the chip current being larger than or equal to zero in magnitude;

wherein the first switch is further configured to be:
closed during a first time duration in response to the control signal; and
open during a second time duration in response to the control signal;
wherein the first capacitor is configured to:
in response to the first switch being closed, receive a first supply voltage through the first switch during the first time
duration;

in response to the first switch being open, not store any additional power and not allow first stored power to leak out through
the first switch during the second time duration; and

output a first output voltage during the first time duration and the second time duration;
wherein the second switch is further configured to be:
closed during the first time duration in response to the control signal; and
open during the second time duration in response to the control signal;
wherein the second capacitor is configured to:
in response to the second switch being closed, receive the first supply voltage through the second switch during the first
time duration;

in response to the second switch being open, not store any additional power and not allow second stored power to leak out
through the second switch during the second time duration; and

output a second output voltage during the first time duration and the second time duration;
wherein the third switch is further configured to be:
closed during the first time duration in response to the control signal; and
open during the second time duration in response to the control signal;
wherein the third capacitor is configured to:
in response to the third switch being closed, receive a second supply voltage through the third switch during the first time
duration;

in response to the third switch being open, not store any additional power and not allow third stored power to leak out through
the third switch during the second time duration; and

output a third output voltage during the first time duration and the second time duration;
wherein:
the chip is an integrated circuit; and
the chip does not include any additional chip terminal other than the first chip terminal and the second chip terminal.

US Pat. No. 9,883,562

SYSTEMS AND METHODS FOR INTELLIGENT DIMMING CONTROL USING TRIAC DIMMERS

On-Bright Electronics (Sh...

6. An apparatus for a power conversion system, the apparatus comprising:
a process-and-drive component configured to receive an input signal, process information associated with the input signal,
and output a drive signal to a switch to affect a current that flows through a primary winding of a power conversion system;

wherein:
the input signal includes one or more input pulses and a first input pulse, the one or more input pulses corresponding to
one or more input periods respectively, the first input pulse corresponding to a first input period, the first input period
being after the one or more input periods;

the drive signal is associated with one or more modulation periods and a first modulation period, the one or more modulation
periods corresponding to the one or more input periods respectively, the first modulation period corresponding to the first
input period;

wherein:
the one or more input pulses are associated with one or more pulse widths respectively;
the process-and-drive component is further configured to:
process information associated with the one or more pulse widths;
select a first smallest pulse width from the one or more pulse widths;
determine a first duration of the first modulation period based on at least information associated with the first smallest
pulse width; and

change the drive signal between a first logic level and a second logic level at a modulation frequency during the first modulation
period.

US Pat. No. 9,729,067

SYSTEMS AND METHODS FOR REDUCING ELECTROMAGNETIC INTERFERENCE BY ADJUSTING SWITCHING PROCESSES

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:
a signal generator configured to receive a feedback signal associated with an output signal of the power conversion system
and a current sensing signal associated with a primary current flowing through a primary winding of the power conversion system
and generate a modulation signal based on at least information associated with the feedback signal and the current sensing
signal; and

a driving component configured to receive the modulation signal and output a drive signal to a switch based on at least information
associated with the modulation signal;

wherein the driving component is further configured to, if at a first time, the modulation signal changes from a first logic
level to a second logic level,

change the drive signal from a first magnitude value at the first time to a second magnitude value at a second time in order
to close the switch, the second time being after the first time by a time period larger than zero; and

at all times after the first time but before the second time, change the drive signal in magnitude to be smaller than the
first magnitude but larger than the second magnitude, or at all times after the first time but before the second time, change
the drive signal in magnitude to be larger than the first magnitude and smaller than the second magnitude.

US Pat. No. 9,722,495

SYSTEMS AND METHODS FOR REAL-TIME SIGNAL SAMPLING IN POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:
a signal processing component configured to:
directly receive a feedback signal associated with an output signal of a power conversion system;
use at least the feedback signal to generate a first processed signal; and
generate the first processed signal based at least in part on the feedback signal; and
a driving component configured to generate a drive signal based on at least information associated with the first processed
signal and output the drive signal to a switch in order to affect a primary current flowing through a primary winding, the
drive signal being associated with at least one switching period related to the switch;

wherein the signal processing component includes:
a sampling and holding component configured to:
sample and hold the feedback signal a plurality of times during a demagnetization period of the switching period, the demagnetization
period corresponding to a demagnetization process of the power conversion system; and

generate a plurality of sampled and held signals based on at least information associated with the feedback signal; and
a selection and holding component coupled directly to the sampling and holding component and configured to:
receive the plurality of sampled and held signals directly from the sampling and holding component;
after the plurality of sampled and held signals are received,
select a signal from the plurality of sampled and held signals;
hold the selected signal; and
generate the first processed signal, the first processed signal being the same as the selected and held signal; and
a counter component configured to:
receive a detection signal indicating the demagnetization period; and
generate a plurality of sampling signals based on at least information associated with the detection signal;
wherein the sampling and holding component includes:
a plurality of first switches configured to be closed in response to the plurality of sampling signals respectively in order
to sample the feedback signal; and

a plurality of first capacitors coupled to the plurality of first switches respectively in order to hold the sampled feedback
signal;

wherein the selection and holding component includes:
a plurality of second switches configured to be closed in response to a plurality of selection signals respectively in order
to select the selected signal from the plurality of sampled and held signals; and

a second capacitor coupled to the plurality of second switches;
wherein the plurality of second switches includes a plurality of first switch terminals and a plurality of second switch terminals,
each switch of the plurality of second switches including a terminal of the plurality of first switch terminals and a terminal
of the plurality of second switch terminals;

wherein:
the plurality of first capacitors does not include the second capacitor;
each terminal of the plurality of first switch terminals is directly coupled to one capacitor of the plurality of first capacitors;
different terminals of the plurality of first switch terminals are directly coupled to different capacitors of the plurality
of first capacitors;

each terminal of the plurality of second switch terminals is directly coupled to the second capacitor; and
different terminals of the plurality of second switch terminals are directly coupled to the same second capacitor.

US Pat. No. 9,722,497

SYSTEMS AND METHODS FOR ADJUSTING FREQUENCIES AND CURRENTS BASED ON LOAD CONDITIONS OF POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:
a detector configured to detect at least one valley in an input signal in magnitude during a detection period for a first
switching period, and output a detection signal based at least in part on the input signal to affect a driving signal to a
switch, the switch being associated with a first current flowing through a primary winding of the power conversion system;

wherein:
the switch includes a first switch terminal related to a first voltage and a second switch terminal related to a second voltage;
the driving signal is associated with a plurality of switching periods including the first switching period and a second switching
period, the second switching period following the first switching period;

the at least one valley in the input signal includes a valley associated with a difference between the first voltage and the
second voltage in magnitude; and

the detection period begins at an end of a first predetermined time period and ends at an end of a second predetermined time
period, the second predetermined time period being larger in duration than the first predetermined time period.

US Pat. No. 9,716,469

AMPLIFICATION SYSTEMS AND METHODS WITH ONE OR MORE CHANNELS

On-Bright Electronics (Sh...

1. A system for amplifying one or more input signals to generate one or more output signals, the system comprising:
a first oscillator configured to generate a ramp signal associated with a ramping frequency; and
one or more first comparators configured to receive the ramp signal and generate one or more comparison signals based at least
in part on the ramp signal;

wherein the first oscillator is further configured to:
change the ramping frequency periodically so that one or more first changes in the ramping frequency are made in each periodic-jittering
period corresponding to a periodic-jittering frequency; and

output the ramp signal associated with the changed ramping frequency;
wherein the periodic-jittering frequency is larger than an upper limit of a predetermined audio frequency range.

US Pat. No. 9,780,672

SYSTEMS AND METHODS FOR OVERVOLTAGE PROTECTION FOR LED LIGHTING

On-Bright Electronics (Sh...

1. A system controller for a power converter, the system controller comprising:
a logic controller configured to generate a modulation signal;
a driver configured to receive the modulation signal, generate a drive signal based at least in part on the modulation signal,
and output the drive signal to a switch to affect a current flowing through an inductive winding for a power converter;

a voltage-to-voltage converter configured to receive a first voltage signal, the modulation signal, and a demagnetization
signal, and to generate a second voltage signal based at least in part on the first voltage signal, the modulation signal,
and the demagnetization signal; and

a comparator configured to receive a first threshold signal, generate a comparison signal based on at least information associated
with the second voltage signal and the first threshold signal, and output the comparison signal to the logic controller;

wherein:
the modulation signal indicates an on-time period for the switch;
the demagnetization signal indicates a demagnetization period for the inductive winding; and
the second voltage signal is approximately equal to the first voltage signal multiplied by a ratio of the on-time period to
a sum of the on-time period and the demagnetization period in magnitude.

US Pat. No. 9,685,919

AMPLIFICATION SYSTEMS AND METHODS WITH OUTPUT REGULATION

On-Bright Electronics (Sh...

1. A system for amplifying multiple input signals to generate multiple output signals, the system comprising:
a first channel configured to receive a first input signal and a second input signal and generate a first output signal and
a second output signal based at least in part on the first input signal and the second input signal; and

a second channel configured to receive a third input signal and a fourth input signal and generate a third output signal and
a fourth output signal based at least in part on the third input signal and the fourth input signal;

wherein:
a first differential signal is equal to the first input signal minus the second input signal; and
a second differential signal is equal to the third input signal minus the fourth input signal;
wherein:
the first output signal corresponds to a first phase;
the second output signal corresponds to a second phase;
the third output signal corresponds to a third phase; and
the fourth output signal corresponds to a fourth phase;
wherein:
a first phase difference is equal to the first phase minus the third phase; and
a second phase difference is equal to the second phase minus the fourth phase;
wherein:
the first differential signal and the second differential signal are the same;
the first phase difference is not equal to zero;
the second phase difference is not equal to zero; and
the first phase difference and the second phase difference are the same.

US Pat. No. 9,768,777

SYSTEMS AND METHODS OF LEVEL SHIFTING FOR VOLTAGE DRIVERS

On-Bright Electronics (Sh...

1. A system for controlling one or more switches, the system comprising:
a first converting circuit configured to convert a first current and generate a first converted voltage signal based at least
in part on the first current;

a second converting circuit configured to convert a second current and generate a second converted voltage signal based at
least in part on the second current;

a signal processing component configured to receive the first converted voltage signal and the second converted voltage signal
and generate an output signal based on at least information associated with the first converted voltage signal and the second
converted voltage signal;

a first switch configured to receive a first input signal and allow the first current to flow through the first switch based
on at least information associated with the first input signal; and

a second switch configured to receive a second input signal and allow the second current to flow through the second switch
based on at least information associated with the second input signal;

wherein the signal processing component is further configured to:
if the second converted voltage signal is larger than the first converted voltage signal by at least a first predetermined
magnitude, generate the output signal at a first logic level; and

if the first converted voltage signal is larger than the second converted voltage signal by at least a second predetermined
magnitude, generate the output signal at a second logic level, the second logic level being different from the first logic
level;

wherein the signal processing component is further configured to receive a first voltage and a second voltage, the first voltage
minus the second voltage in magnitude being equal to a first predetermined value;

wherein:
the first switch is further configured to receive the first input signal at the first logic level at a first time, the first
time being after the second voltage increases in magnitude to a second predetermined value;

the second switch is further configured to receive the second input signal at the second logic level at the first time; and
the signal processing component is further configured to change the output signal from the second logic level to the first
logic level at a second time, the second time being no earlier than the first time.

US Pat. No. 10,091,847

SYSTEMS AND METHODS FOR DIMMING CONTROL USING TRIAC DIMMERS

On-Bright Electronics (Sh...

1. A system for dimming control of one or more light emitting diodes, the system comprising:one or more signal processing components configured to receive a first signal associated with a TRIAC dimmer, process information associated with the first signal, determine whether the TRIAC dimmer is in a first condition or a second condition, generate a second signal based on at least information associated with the first signal, and send the second signal to a switch;
wherein the one or more signal processing components are further configured to:
if the TRIAC dimmer is determined to be in the first condition, generate the second signal to cause the switch to be opened and closed corresponding to a modulation frequency; and
if the TRIAC dimmer is determined to be in the second condition, generate the second signal to cause the switch to remain closed for a first period of time until at least the TRIAC dimmer changes from the second condition to the first condition.

US Pat. No. 9,825,539

SYSTEM AND METHOD PROVIDING PROTECTION IN THE EVENT OF CURRENT SENSING FAILURE FOR POWER CONVERTER

On-Bright Electronics (Sh...

1. A system for protecting a power converter, the system comprising:
a first comparator configured to receive a first threshold signal and a first signal and to generate a first comparison signal,
the first signal being associated with an input current for a power converter;

a second comparator configured to receive a second threshold signal and the first signal and to generate a second comparison
signal, the second threshold signal being different from the first threshold signal in magnitude;

a detection component configured to receive at least the second comparison signal, detect the second comparison signal only
if one or more predetermined conditions are satisfied, and generate a detection signal based on at least information associated
with the detected second comparison signal; and

a switch signal generator coupled to at least the detection component and configured to generate a switch signal for controlling
a switch for adjusting the input current for the power converter based on at least information associated with the first comparison
signal and the detection signal;

wherein:
the switch signal generator is further configured to generate the switch signal to turn off the switch if the first comparison
signal indicates the first signal is larger than the first threshold signal in magnitude; and

the switch signal generator is further configured to generate the switch signal to turn off the switch if the detection signal
indicates the first signal is smaller than the second threshold signal in magnitude.

US Pat. No. 9,787,198

SYSTEMS AND METHODS WITH PREDICTION MECHANISMS FOR SYNCHRONIZATION RECTIFIER CONTROLLERS

On-Bright Electronics (Sh...

10. A system controller for regulating a power converter, the system controller comprising:
a first controller terminal; and
a second controller terminal;
wherein the system controller is configured to:
receive, at the first controller terminal, an input signal;
generate a first drive signal based at least in part on the input signal; and
output, at the second controller terminal, the first drive signal to a first switch to affect a first current associated with
a secondary winding of the power converter;

wherein the system controller is further configured to:
detect a first duration of a first time period for a second drive signal based at least in part on the input signal, the second
drive signal being outputted to a second switch to affect a second current associated with a primary winding of the power
converter, the primary winding being coupled to the secondary winding, the first time period including a first beginning and
a first end;

detect a demagnetization duration of a demagnetization period associated with the secondary winding based at least in part
on the input signal, the demagnetization period including a second beginning and a second end;

detect a second duration of a second time period for the second drive signal based at least in part on the input signal, the
second time period including a third beginning and a third end;

determine a third duration of a third time period for the first drive signal based at least in part on the first duration,
the demagnetization duration, and the second duration, the third time period including a fourth beginning and a fourth end,
the fourth end being after the first end, the second end, and the third end; and

keep the first drive signal at a first logic level during the entire third time period to keep the first switch closed during
the entire third time period;

wherein:
the second switch is closed from the first beginning to the first end;
the second switch is open from the first end to the third beginning; and
the second switch is closed from the third beginning to the third end.

US Pat. No. 10,090,768

SYSTEMS AND METHODS FOR REGULATING POWER CONVERSION SYSTEMS WITH OUTPUT DETECTION AND SYNCHRONIZED RECTIFYING MECHANISMS

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:a comparator configured to receive an input signal and output a comparison signal based at least in part on the input signal;
a first signal detector configured to receive the input signal and output a first detection signal based at least in part on the input signal;
a second signal detector configured to receive the input signal and output a second detection signal based at least in part on the input signal; and
a driver configured to:
generate a drive signal based on at least information associated with the comparison signal, the first detection signal and the second detection signal; and
output the drive signal to a gate terminal of a transistor to turn on or off the transistor in order to affect a current associated with a secondary winding of the power conversion system, the transistor including the gate terminal, a drain terminal and a source terminal;
wherein:
the comparator is further configured to determine whether the input signal is larger than a threshold;
the first signal detector is further configured to determine whether the input signal includes one or more falling edges;
the second signal detector is further configured to determine whether the input signal includes one or more rising edges;
the driver is further configured to, under a discontinuous conduction mode of the power conversion system:
if the comparison signal indicates the input signal is larger than the threshold, generate the drive signal at a first logic level to turn off the transistor; and
if the first detection signal indicates the input signal includes the one or more falling edges, change the drive signal from the first logic level to a second logic level to turn on the transistor; and
the driver is further configured to, under a continuous conduction mode of the power conversion system:
if the first detection signal indicates the input signal includes the one or more falling edges, change the drive signal from the first logic level to a second logic level to turn on the transistor, and
if the second detection signal indicates the input signal includes the one or more rising edges, generate the drive signal at the first logic level to turn off the transistor; and
wherein the discontinuous conduction mode of the power conversion system is different from the continuous conduction mode of the power conversion system;
wherein:
the drain terminal is directly connected to a first winding terminal of the secondary winding, the secondary winding further including a second winding terminal;
the first winding terminal of the secondary winding is also directly connected to a first resistor terminal of a resister, the resistor further including a second resistor terminal;
the second winding terminal is directly connected to a first capacitor terminal of a capacitor, the capacitor further including a second capacitor terminal;
the second capacitor terminal is directly connected to the source terminal;
the second capacitor terminal and the source terminal both are biased to a ground voltage; and
the second resistor terminal is connected to the comparator, the first signal detector and the second signal detector, directly or indirectly through an offset component.

US Pat. No. 10,075,069

SYSTEMS AND METHODS FOR OUTPUT CURRENT REGULATION IN POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:a first controller terminal configured to provide a compensation signal based on at least information associated with a first current flowing through an inductive winding of a power converter;
a ramp-current generator configured to receive a modulation signal, the compensation signal and a first reference signal and generate a ramp current based at least in part on the modulation signal, the compensation signal and the first reference signal;
a ramp-signal generator configured to receive the ramp current and generate a ramping signal based at least in part on the ramp current;
a modulation component configured to receive the ramping signal and the compensation signal and generate the modulation signal based at least in part on the ramping signal and the compensation signal; and
a driver configured to generate a drive signal based on at least information associated with the modulation signal and output the drive signal to a switch to affect the first current, the drive signal being associated with a switching period including an on-time period and an off-time period;
wherein:
the switch is closed in response to the drive signal during the on-time period;
the switch is opened in response to the drive signal during the off-time period;
a duty cycle is equal to a duration of the on-time period divided by a duration of the switching period; and
one minus the duty cycle is equal to a parameter;
wherein the ramp-current generator is further configured to generate the ramp current approximately proportional in magnitude to a multiplication product of the duty cycle, the parameter and a difference, the difference representing the first reference signal minus the compensation signal in magnitude.

US Pat. No. 9,967,941

SYSTEMS AND METHODS FOR TEMPERATURE CONTROL IN LIGHT-EMITTING-DIODE LIGHTING SYSTEMS

ON-BRIGHT ELECTRONICS (SH...

1. A system controller for regulating one or more currents, the system controller comprising:a thermal detector configured to detect a temperature associated with the system controller and generate a thermal detection signal based at least in part on the detected temperature;
a modulation-and-driver component configured to receive the thermal detection signal and generate a drive signal based at least in part on the thermal detection signal to close or open a switch to affect a drive current associated with one or more light emitting diodes;
a first comparator configured to receive a first voltage signal and a current sensing signal and generate a first comparison signal based at least in part on the first voltage signal and the current sensing signal, the current sensing signal being associated with the drive current, the first voltage signal being associated with the thermal detection signal; and
an operation-mode detection component configured to receive a second voltage signal associated with the drive current and generate a mode detection signal based at least in part on the second voltage signal;
wherein the modulation-and-driver component is further configured to:
in response to the detected temperature increasing from a first temperature threshold but remaining smaller than a second temperature threshold, generate the drive signal to keep the drive current at a first current magnitude, the second temperature threshold being higher than the first temperature threshold;
in response to the detected temperature increasing to become equal to or larger than the second temperature threshold, change the drive signal to reduce the drive current from the first current magnitude to a second current magnitude, the second current magnitude being smaller than the first current magnitude;
in response to the detected temperature decreasing from the second temperature threshold but remaining larger than the first temperature threshold, generate the drive signal to keep the drive current at the second current magnitude; and
in response to the detected temperature decreasing to become equal to or smaller than the first temperature threshold, change the drive signal to increase the drive current from the second current magnitude to the first current magnitude; and
receive the first comparison signal and the mode detection signal and generate the drive signal based at least in part on the first comparison signal and the mode detection signal.

US Pat. No. 9,825,542

SYSTEMS AND METHODS FOR ADJUSTING PEAK FREQUENCIES WITH DUTY CYCLES

On-Bright Electronics (Sh...

1. A system controller for regulating a power converter, the system controller comprising:
a first controller terminal configured to output a drive signal to a switch to affect a primary current flowing through a
primary winding of the power converter, the drive signal being associated with a switching period including an on-time period
and an off-time period, the switching period corresponding to a switching frequency; and

a second controller terminal configured to receive a feedback signal associated with an output voltage related to a secondary
winding of the power converter, the secondary winding being coupled to the primary winding;

wherein the first controller terminal is further configured to:
output the drive signal to close the switch during the on-time period; and
output the drive signal to open the switch during the off-time period;
wherein a duty cycle is equal to a duration of the on-time period divided by a duration of the switching period;
wherein the system controller is configured to set the switching frequency to one or more frequency magnitudes, each of the
one or more frequency magnitudes being smaller than or equal to an upper frequency limit;

wherein the system controller is further configured to:
increase the upper frequency limit within a first magnitude range in response to increasing of the duty cycle; and
decrease the upper frequency limit within the first magnitude range in response to decreasing of the duty cycle.

US Pat. No. 9,807,840

LED LIGHTING SYSTEMS AND METHODS FOR CONSTANT CURRENT CONTROL IN VARIOUS OPERATION MODES

On-Bright Electronics (Sh...

1. A system for providing at least an output current to one or more light emitting diodes, the system comprising:
a control component configured to receive at least a demagnetization signal, a sensed signal and a reference signal and to
generate a control signal based on at least information associated with the demagnetization signal, the sensed signal and
the reference signal;

a logic and driving component configured to receive at least the control signal and output a drive signal to a switch based
on at least information associated with the control signal; and

a demagnetization component configured to receive a feedback signal, directly or indirectly, from a first diode terminal of
a diode and a first inductor terminal of an inductor, and to generate the demagnetization signal based on at least information
associated with the feedback signal;

wherein:
the switch is connected to the first diode terminal and the first inductor terminal, the diode further including a second
diode terminal, the inductor further including a second inductor terminal;

the second diode terminal and the second inductor terminal are configured to provide at least the output current to the one
or more light emitting diodes; and

the control signal is configured to regulate the output current at a constant magnitude.

US Pat. No. 10,063,153

SYSTEMS AND METHODS FOR REGULATING POWER CONVERSION SYSTEMS WITH OUTPUT DETECTION AND SYNCHRONIZED RECTIFYING MECHANISMS

On-Bright Electronics (Sh...

14. A system controller for a power converter, the system controller comprising:a first controller terminal;
wherein the system controller is configured to generate a drive signal at the first controller terminal based at least in part on an input signal to turn on or off a transistor in order to affect a current associated with a secondary winding of a power converter, the input signal being proportional to an output voltage associated with the secondary winding of the power converter;
wherein the system controller is further configured to, only if the input signal changes from a first value larger than a first threshold to a second value smaller than the first threshold, generate a pulse of the drive signal to turn on the transistor during a pulse period of the pulse.

US Pat. No. 9,621,121

AMPLIFICATION SYSTEMS AND METHODS WITH OUTPUT REGULATION

On-Bright Electronics (Sh...

1. A system for amplifying multiple input signals to generate multiple output signals, the system comprising:
a first channel configured to receive a first input signal and a second input signal and generate a first output signal and
a second output signal based at least in part on the first input signal and the second input signal; and

a second channel configured to receive a third input signal and a fourth input signal and generate a third output signal and
a fourth output signal based at least in part on the third input signal and the fourth input signal;

wherein:
a first differential signal is equal to the first input signal minus the second input signal; and
a second differential signal is equal to the third input signal minus the fourth input signal;
wherein:
the first output signal corresponds to a first phase;
the second output signal corresponds to a second phase;
the third output signal corresponds to a third phase; and
the fourth output signal corresponds to a fourth phase;
wherein:
a first phase difference is equal to the first phase minus the third phase; and
a second phase difference is equal to the second phase minus the fourth phase;
wherein:
the first differential signal and the second differential signal are the same;
the first phase difference is not equal to zero;
the second phase difference is not equal to zero; and
the first phase difference and the second phase difference are the same.

US Pat. No. 9,825,533

SYSTEMS AND METHODS FOR VOLTAGE REGULATION OF PRIMARY SIDE REGULATED POWER CONVERSION SYSTEMS WITH COMPENSATION MECHANISMS

On-Bright Electronics (Sh...

1. A system controller for a power conversion system, the system controller comprising:
a compensation component configured to generate a compensation signal based at least in part on an on-time period associated
with a first switch of a power conversion system, the first switch being closed during the on-time period;

a summation component configured to receive the compensation signal and a reference signal and generate a first signal based
at least in part on the compensation signal and the reference signal, the first signal being related to a combination of the
compensation signal and the reference signal;

an error amplifier configured to receive the first signal and a second signal and generate an amplified signal based at least
in part on the first signal and the second signal, the second signal being related to a feedback signal associated with an
auxiliary winding coupled with a secondary winding of the power conversion system;

a modulation component configured to receive the amplified signal and generate a modulation signal based at least in part
on the amplified signal; and

a driver component configured to receive the modulation signal and output a drive signal based at least in part on the modulation
signal to close or open the first switch to affect a first current flowing through a primary winding of the power conversion
system;

wherein the system controller is configured to change the drive signal based on at least information associated with the compensation
signal in order to adjust a winding voltage of the secondary winding and to at least partially compensate for a change in
a forward voltage of a rectifying diode associated with the secondary winding.

US Pat. No. 9,819,262

SYSTEMS AND METHODS FOR ENHANCING DYNAMIC RESPONSE OF POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:
an amplifier configured to receive a reference signal and a feedback signal associated with an output signal of the power
conversion system, the amplifier including an amplifier terminal;

a variable-resistance component associated with a first variable resistance value, the variable-resistance component including
a first component terminal and a second component terminal, the first component terminal being coupled with the amplifier
terminal;

a capacitor including a first capacitor terminal and a second capacitor terminal, the first capacitor terminal being coupled
with the second component terminal; and

a modulation and drive component including a third component terminal and a fourth component terminal, the third component
terminal being coupled with the amplifier terminal, the modulation and drive component being configured to output a drive
signal at the fourth component terminal to a switch in order to affect the output signal of the power conversion system;

wherein the system controller is configured to:
during a first time period, set the first variable resistance value to a first resistance magnitude in order to operate in
a first mode;

during a second time period, change the first variable resistance value from the first resistance magnitude to a second resistance
magnitude; and

during a third time period, set the first variable resistance value to the second resistance magnitude in order to operate
in a second mode;

wherein:
the first resistance magnitude is larger than the second resistance magnitude;
the first mode is different from the second mode;
the first time period precedes the second time period, the second time period beginning immediately after the first time period
ends; and

the second time period precedes the third time period, the third time period beginning immediately after the second time period
ends.

US Pat. No. 9,883,556

SYSTEMS AND METHODS FOR CURRENT REGULATION IN LIGHT-EMITTING-DIODE LIGHTING SYSTEMS

On-Bright Electronics (Sh...

1. A system controller comprising:
a first controller terminal configured to receive an input voltage, the first controller terminal being further configured
to allow a first current flowing into the system controller based at least in part on the input voltage in response to one
or more switches being closed;

a second controller terminal configured to allow the first current to flow out of the system controller through the second
controller terminal in response to the one or more switches being closed, the second controller terminal being further configured
to receive a current sensing signal based at least in part on the first current;

a third controller terminal configured to be biased at a first voltage;
a fourth controller terminal coupled to the third controller terminal through a first capacitor, the first capacitor not being
any part of the system controller;

an error amplifier configured to generate a compensation signal based at least in part on the current sensing signal, the
error amplifier including a second capacitor; and

a driver configured to generate a drive signal based at least in part on the compensation signal and output the drive signal
to affect the first current flowing from the first controller terminal to the second controller terminal;

wherein the error amplifier further includes a first input terminal, a second input terminal, and an output terminal;
wherein:
the first input terminal is coupled directly or indirectly with the second controller terminal;
the second input terminal is configured to receive a second voltage; and
the output terminal is coupled directly to the second capacitor.

US Pat. No. 9,883,557

TWO-TERMINAL INTEGRATED CIRCUITS WITH TIME-VARYING VOLTAGE-CURRENT CHARACTERISTICS INCLUDING PHASED-LOCKED POWER SUPPLIES

On-Bright Electronics (Sh...

1. A two-terminal IC chip, the chip comprising:
a first chip terminal;
a second chip terminal;
a first switch configured to receive a first signal; and
a first power supply coupled to the first switch;
wherein the first switch is configured to be:
closed during a first time duration in response to the first signal; and
open during a second time duration in response to the first signal;
wherein the first power supply is configured to:
in response to the first switch being closed, receive a first power through the first switch and store the received first
power during the first time duration; and

in response to the first switch being open, not store any additional power and not allow stored power to leak out through
the first switch during the second time duration;

wherein the first power supply is further configured to output a second power during the first time duration and the second
time duration;

wherein:
a first terminal voltage is a voltage of the first chip terminal;
a second terminal voltage is a voltage of the second chip terminal; and
a chip voltage is equal to a difference between the first terminal voltage and the second terminal voltage;
wherein the chip is configured to allow a chip current to flow into the chip at the first chip terminal and out of the chip
at the second chip terminal, or to flow into the chip at the second chip terminal and out of the chip at the first chip terminal,
the chip current being larger than or equal to zero in magnitude;

wherein the chip is further configured to, based at least in part on the second power, generate at least one selected from
a group consisting of the chip voltage and the chip current;

wherein:
the chip is an integrated circuit; and
the chip does not include any additional chip terminal other than the first chip terminal and the second chip terminal.

US Pat. No. 9,847,728

SYSTEMS AND METHODS FOR REGULATING POWER CONVERSION SYSTEMS OPERATING IN QUASI-RESONANT MODE

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:
a first signal processing component configured to receive a first signal associated with an auxiliary winding of a power conversion
system and generate a second signal based at least in part on the first signal, the power conversion system further including
a primary winding and a secondary winding; and

a drive component configured to receive the second signal and output a drive signal to open or close a switch to affect a
current flowing through the primary winding;

wherein the first signal processing component is further configured to:
detect a plurality of valleys of the first signal, the plurality of valleys corresponding to a same demagnetization process
of the power conversion system;

select a valley from the plurality of valleys; and
change the second signal at the selected valley;
wherein the drive component is further configured to change the drive signal based on at least information associated with
the selected valley in order to close the switch.

US Pat. No. 9,843,263

SYSTEMS AND METHODS FOR DRIVING A BIPOLAR JUNCTION TRANSISTOR BY ADJUSTING BASE CURRENT WITH TIME

On-Bright Electronics (Sh...

1. A system for driving a bipolar junction transistor for a power converter, the system comprising:
a current generator configured to output a drive current signal to the bipolar junction transistor to adjust a primary current
flowing through a primary winding of the power converter;

wherein:
the current generator is further configured to drive the bipolar junction transistor to operate in a hard-saturation region
during a first time period and a second time period;

the first time period is followed by the second time period;
the first time period starts at a first time and ends at a second time; and
the second time period starts at a third time and ends at a fourth time;
wherein:
the drive current signal is equal to a first current at the first time;
the drive current signal is equal to a second current at the second time;
the drive current signal is equal to a third current at the third time; and
the drive current signal is equal to a fourth current at the fourth time;
wherein the current generator is further configured to:
receive a feedback signal associated with the primary current; and
generate the drive current signal based on at least information associated with the feedback signal during at least the second
time period; and

wherein:
the second current is larger than the third current in magnitude; and
the second time and the third time are the same;
wherein the fourth current is larger than the third current in magnitude.

US Pat. No. 10,044,254

SYSTEMS AND METHODS FOR REGULATING OUTPUT CURRENTS OF POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:a first controller terminal configured to receive a first signal associated with an input signal for a primary winding of a power conversation system; and
a second controller terminal configured to output a drive signal to a switch to affect a first current flowing through the primary winding of the power conversion system, the drive signal being associated with an on-time period, the switch being closed during the on-time period;
wherein the system controller is configured to adjust a duration of the on-time period based on at least information associated with the first signal.

US Pat. No. 9,960,674

SYSTEMS AND METHODS FOR OUTPUT CURRENT REGULATION IN POWER CONVERSION SYSTEMS

ON-BRIGHT ELECTRONICS (SH...

2. A system controller for regulating a power converter, the system controller comprising:a driver configured to output a drive signal to a switch to affect a current flowing through an inductive winding of a power converter, the drive signal being associated with a switching period including an on-time period and an off-time period; and
a controller terminal configured to receive a first signal related to an input signal of the power converter;
wherein:
the switch is closed in response to the drive signal during the on-time period;
the switch is opened in response to the drive signal during the off-time period;
a duty cycle is equal to a duration of the on-time period divided by a duration of the switching period; and
one minus the duty cycle is equal to a parameter;
wherein the system controller is configured to keep a multiplication product of the duty cycle, the parameter and the duration of the on-time period approximately constant;
wherein the system controller is configured to keep a multiplication product of the duty cycle, the parameter and the duration of the on-time period approximately constant so that an average of the current during one or more switching periods increases in magnitude with the increasing input signal over time and decreases in magnitude with the decreasing input signal over time.

US Pat. No. 9,871,391

SYSTEMS AND METHODS FOR DISCHARGING AN AC INPUT CAPACITOR WITH AUTOMATIC DETECTION

On-Bright Electronics (Sh...

1. A system for discharging a capacitor, the system comprising:
a signal detector configured to receive an input signal and generate a detection signal based at least in part on the input
signal, the input signal being associated with an alternate current signal; and

a discharge controller configured to receive the detection signal and generate an output signal to discharge a capacitor in
response to the detection signal satisfying one or more conditions, the capacitor including a first capacitor terminal and
a second capacitor terminal;

wherein:
the signal detector is further configured to, during a first time period, sample the input signal a first plurality of times
to generate a first plurality of sampled signals respectively and compare each sampled signal of the first plurality of sampled
signals with a first threshold; and

the discharge controller is further configured to, in response to the detection signal indicating that each sampled signal
of the first plurality of sampled signals is larger than the first threshold, generate the output signal to discharge the
capacitor, or is further configured to, in response to the detection signal indicating that each sampled of the first plurality
of sampled signals is smaller than the first threshold, generate the output signal to discharge the capacitor.

US Pat. No. 9,871,451

SYSTEMS AND METHODS FOR VOLTAGE CONTROL AND CURRENT CONTROL OF POWER CONVERSION SYSTEMS WITH MULTIPLE OPERATION MODES

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:
an operation-mode-selection component configured to receive a first signal related to an output load of the power conversion
system and a second signal related to an input signal received by the power conversion system and output a mode-selection
signal based on at least information associated with the first signal and the second signal; and

a driving component configured to receive the mode-selection signal and generate a drive signal based on at least information
associated with the mode-selection signal, the driving signal corresponding to a switching frequency;

wherein the operation-mode-selection component is further configured to:
if the output load is determined to be larger than a first load threshold in magnitude and the input signal is determined
to be larger than an input threshold, generate the mode-selection signal corresponding to a first mode if the switching frequency
is determined to be smaller than a first frequency threshold and larger than a second frequency threshold; and

if the output load is determined to be larger than the first load threshold in magnitude and the input signal is determined
to be smaller than the input threshold, generate the mode-selection signal corresponding to a second mode if the switching
frequency is determined to be equal to the second frequency threshold;

wherein the operation-mode-selection component is further configured to, if the output load is determined to be smaller than
the first load threshold and larger than a second load threshold in magnitude, generate the mode-selection signal corresponding
to the first mode if the switching frequency is determined to be smaller than the first frequency threshold and larger than
the second frequency threshold; and

wherein:
the first mode is a valley switching mode;
the second mode is a continuous conduction mode; and
the first mode is different from the second mode;
wherein the operation-mode-selection component is further configured to:
process information associated with the first signal;
detect an end of a demagnetization period based at least in part on the first signal;
detect a first valley in the first signal, there being no other valley in the first signal between the end of the demagnetization
period and the first valley; and

under the valley switching mode, in response to the first valley being detected in the first signal, change the drive signal
from a first logic level to a second logic level in order to trigger a switching cycle of the power conversion system.

US Pat. No. 10,148,187

SYSTEMS AND METHODS FOR REGULATING POWER CONVERSION SYSTEMS WITH OUTPUT DETECTION AND SYNCHRONIZED RECTIFYING MECHANISMS

On-Bright Electronics (Sh...

22. A system for regulating a power converter, the system comprising:a first system controller configured to:
generate a first drive signal based at least in part on an input signal to turn on or off a transistor to affect a first current associated with the secondary winding of the power converter; and
a second system controller configured to:
generate a second drive signal based at least in part on a feedback signal; and
output the second drive signal to a switch to affect a second current flowing through a primary winding of the power converter;
wherein:
the first system controller is further configured to, in response to the input signal indicating that an output voltage changes from a first value larger than a first threshold to a second value smaller than the first threshold, generate one or more pulses of the first drive signal to turn on and off the transistor; and
the second system controller is further configured to:
process the feedback signal to detect the one or more pulses of the first drive signal; and
in response to the one or more pulses of the first drive signal being detected, increase a switching frequency associated with the second drive signal;
wherein the second system controller includes:
a detector configured to receive the feedback signal, detect the one or more pulses of the first drive signal based at least in part on the feedback signal, and output a detection signal based at least in part on the detected one or more pulses;
a signal generator configured to receive the detection signal and output a modulation signal based at least in part on the detection signal; and
a driver configured to receive the modulation signal and output the second drive signal to the switch.

US Pat. No. 10,122,284

SYSTEMS AND METHODS FOR REGULATING POWER CONVERSION SYSTEMS WITH OUTPUT DETECTION AND SYNCHRONIZED RECTIFYING MECHANISMS

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:a comparator configured to receive an input signal and output a comparison signal based at least in part on the input signal;
a first signal detector configured to receive the input signal and output a first detection signal based at least in part on the input signal;
a second signal detector configured to receive the input signal and output a second detection signal based at least in part on the input signal; and
a driver configured to:
generate a drive signal based on at least information associated with the comparison signal, the first detection signal and the second detection signal; and
output the drive signal to a gate terminal of a transistor to turn on or off the transistor in order to affect a current associated with a secondary winding of the power conversion system, the transistor including the gate terminal, a drain terminal and a source terminal;
wherein:
the comparator is further configured to determine whether the input signal is larger than a threshold;
the first signal detector is further configured to determine whether the input signal includes one or more falling edges;
the second signal detector is further configured to determine whether the input signal includes one or more rising edges;
the driver is further configured to, under a discontinuous conduction mode of the power conversion system:
if the comparison signal indicates the input signal is larger than the threshold, generate the drive signal at a first logic level to turn off the transistor; and
if the first detection signal indicates the input signal includes the one or more falling edges, change the drive signal from the first logic level to a second logic level to turn on the transistor; and
the driver is further configured to, under a continuous conduction mode of the power conversion system:
if the first detection signal indicates the input signal includes the one or more falling edges, change the drive signal from the first logic level to a second logic level to turn on the transistor, and
if the second detection signal indicates the input signal includes the one or more rising edges, generate the drive signal at the first logic level to turn off the transistor; and
wherein the discontinuous conduction mode of the power conversion system is different from the continuous conduction mode of the power conversion system;
wherein:
the drain terminal is directly connected to a first winding terminal of the secondary winding, the secondary winding further including a second winding terminal;
the first winding terminal of the secondary winding is also directly connected to a first resistor terminal of a resister, the resistor further including a second resistor terminal;
the second winding terminal is directly connected to a first capacitor terminal of a capacitor, the capacitor further including a second capacitor terminal;
the second capacitor terminal is directly connected to the source terminal;
the second capacitor terminal and the source terminal both are biased to a ground voltage; and
the second resistor terminal is connected to the comparator, the first signal detector and the second signal detector, directly or indirectly through an offset component.

US Pat. No. 10,003,271

SYSTEMS AND METHODS FOR CONSTANT VOLTAGE CONTROL AND CONSTANT CURRENT CONTROL

On-Bright Electronics (Sh...

1. A system controller chip for regulating a power conversion system, the system controller chip comprising:a first controller pin;
a second controller pin; and
a third controller pin;
wherein the system controller chip is configured to:
receive an input signal at the first controller pin and turn on or off a switch based on at least information associated with the input signal to adjust a primary current flowing through a primary winding of the power conversion system;
receive a first signal at the second controller pin from the switch; and
charge a capacitor through the third controller pin in response to the first signal.

US Pat. No. 10,299,322

SYSTEMS AND METHODS FOR REGULATING LED CURRENTS

On-Bright Electronics (Sh...

1. A system for regulating one or more currents, the system comprising:a system controller including a first controller terminal, a second controller terminal, and a ground terminal, the system controller being configured to output a drive signal at the first controller terminal;
an inductor including a first inductor terminal and a second inductor terminal, the first inductor terminal being coupled to the ground terminal, the second inductor terminal being directly coupled to one or more light emitting diodes;
a first resistor including a first resistor terminal and a second resistor terminal, the first resistor terminal being directly coupled to the first inductor terminal;
a switch configured to receive the drive signal and coupled to the second resistor terminal; and
a first diode including a first diode terminal and a second diode terminal and directly coupled to the first resistor, the second diode terminal being coupled to the one or more light emitting diodes;
wherein:
the second controller terminal is coupled indirectly to the switch through at least a second resistor, coupled indirectly to the second inductor terminal through at least a Zener diode and a second diode, and coupled indirectly to the ground terminal through at least a capacitor; and
the Zener diode includes a first Zener terminal and a second Zener terminal, the first Zener terminal directly coupled to the second controller terminal, and the second Zener terminal directly coupled to the second diode.

US Pat. No. 10,057,954

SYSTEMS AND METHODS FOR DIMMING CONTROL USING TRIAC DIMMERS

On-Bright Electronics (Sh...

1. A system for dimming control of one or more light emitting diodes, the system comprising:one or more signal processing components configured to receive a first signal associated with a TRIAC dimmer, process information associated with the first signal, determine whether the TRIAC dimmer is in a first condition or a second condition, generate a second signal based on at least information associated with the first signal, and send the second signal to a switch;
wherein the one or more signal processing components are further configured to:
if the TRIAC dimmer is determined to be in the first condition, generate the second signal to cause the switch to be opened and closed corresponding to a modulation frequency; and
if the TRIAC dimmer is determined to be in the second condition, generate the second signal to cause the switch to remain closed for a first period of time until at least the TRIAC dimmer changes from the second condition to the first condition.

US Pat. No. 10,044,262

SYSTEMS AND METHODS FOR OUTPUT CURRENT REGULATION IN POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:a first controller terminal configured to provide a compensation signal based on at least information associated with a first current flowing through an inductive winding of a power converter;
a ramp-current generator configured to receive a modulation signal, the compensation signal and a first reference signal and generate a ramp current based at least in part on the modulation signal, the compensation signal and the first reference signal;
a ramp-signal generator configured to receive the ramp current and generate a ramping signal based at least in part on the ramp current;
a modulation component configured to receive the ramping signal and the compensation signal and generate the modulation signal based at least in part on the ramping signal and the compensation signal; and
a driver configured to generate a drive signal based on at least information associated with the modulation signal and output the drive signal to a switch to affect the first current, the drive signal being associated with a switching period including an on-time period and an off-time period;
wherein:
the switch is closed in response to the drive signal during the on-time period;
the switch is opened in response to the drive signal during the off-time period;
a duty cycle is equal to a duration of the on-time period divided by a duration of the switching period; and
one minus the duty cycle is equal to a parameter;
wherein the ramp-current generator is further configured to generate the ramp current approximately proportional in magnitude to a multiplication product of the duty cycle, the parameter and a difference, the difference representing the first reference signal minus the compensation signal in magnitude.

US Pat. No. 10,003,268

SYSTEMS AND METHODS FOR OUTPUT CURRENT REGULATION IN POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:a first controller terminal configured to receive a first signal related to an input signal for a primary winding of a power conversation system; and
a second controller terminal configured to output a drive signal to a switch to affect a first current flowing through the primary winding of the power conversion system, the drive signal being associated with a switching period including an on-time period and an off-time period;
wherein:
the switch is closed in response to the drive signal during the on-time period;
the switch is opened in response to the drive signal during the off-time period; and
a duty cycle is equal to a duration of the on-time period divided by a duration of the switching period;
wherein: the system controller is configured to keep a multiplication product of the duty cycle and the duration of the on-time period approximately constant; and the system controller is further configured to keep the multiplication product of the duty cycle and the duration of the on-time period approximately constant so that an average of the first current during one or more switching periods increases in magnitude with the increasing input signal over time and decreases in magnitude with the decreasing input signal over time.

US Pat. No. 9,899,849

SYSTEMS AND METHODS FOR DISCHARGING AN AC INPUT CAPACITOR WITH AUTOMATIC DETECTION

On-Bright Electronics (Sh...

1. A system for discharging a capacitor, the system comprising:
a signal detector configured to receive an input signal and generate a detection signal based at least in part on the input
signal, the input signal being associated with an alternate current signal; and

a discharge controller configured to receive the detection signal and generate an output signal to discharge a capacitor in
response to the detection signal satisfying one or more conditions, the capacitor including a first capacitor terminal and
a second capacitor terminal;

wherein:
the signal detector is further configured to, during a first time period, sample the input signal a first plurality of times
to generate a first plurality of sampled signals respectively and compare each sampled signal of the first plurality of sampled
signals with a first threshold; and

the discharge controller is further configured to, in response to the detection signal indicating that each sampled signal
of the first plurality of sampled signals is larger than the first threshold, generate the output signal to discharge the
capacitor, or is further configured to, in response to the detection signal indicating that each sampled of the first plurality
of sampled signals is smaller than the first threshold, generate the output signal to discharge the capacitor.

US Pat. No. 10,299,332

SYSTEMS AND METHODS FOR INTELLIGENT DIMMING CONTROL USING TRIAC DIMMERS

On-Bright Electronics (Sh...

1. An apparatus for a power conversion system, the apparatus comprising:a process-and-drive component configured to receive an input signal and output a drive signal to a switch to affect a current that flows through one or more light emitting diodes, the one or more light emitting diodes being associated with a secondary winding of a power conversion system;
wherein:
the input signal includes a pulse associated with a pulse width;
the process-and-drive component is further configured to:
process information associated with the pulse width; and
generate the drive signal based on at least information associated with the pulse width so that the current changes non-linearly with the pulse width but a brightness of the one or more light emitting diodes changes linearly with the pulse width.

US Pat. No. 10,205,395

SYSTEMS AND METHODS FOR CURRENT CONTROL OF POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

3. A system controller for a power converter, the system controller comprising:a drive signal generator configured to output a drive signal to a switch in order to affect a current flowing through a primary winding of a power converter, the drive signal being related to a switching period, the switching period including an on-time period and an off-time period, the off-time period including a demagnetization period; and
a detection signal generator configured to receive a feedback signal being related to an output voltage of the power converter and generate a detection signal based at least in part on the feedback signal, the switch being closed during the on-time period, the switch being open during the demagnetization period, the detection signal being different from the drive signal; and
a regulation signal generator configured to:
receive the drive signal;
receive the detection signal, the detection signal indicating the demagnetization period and being different from the drive signal;
receive an input signal, the input signal representing the current flowing through the primary winding in magnitude; and
output a regulation signal based at least in part on the drive signal, the detection signal, and the input signal.

US Pat. No. 10,186,951

SYSTEM AND METHOD PROVIDING OVER CURRENT PROTECTION BASED ON DUTY CYCLE INFORMATION FOR POWER CONVERTER

On-Bright Electronics (Sh...

1. A system controller for protecting a power converter, the system controller comprising:a signal generator configured to generate a threshold signal;
a comparator configured to receive the threshold signal and a current sensing signal and generate a comparison signal based on at least information associated with the threshold signal and the current sensing signal, the current sensing signal indicating a magnitude of a primary current flowing through a primary winding of a power converter; and
a modulation and drive component coupled to the signal generator and configured to receive at least the comparison signal, generate a drive signal based on at least information associated with the comparison signal, and output the drive signal to a switch in order to affect the primary current, the drive signal being associated with one or more first switching periods and a second switching period following the one or more first switching periods, the one or more first switching periods corresponding to one or more first duty cycles, the second switching period including an on-time period and an off-time period;
wherein the signal generator is further configured to, for the second switching period,
determine a first threshold signal value based on at least information associated with the one or more first duty cycles;
set a time to zero at a beginning of the on-time period;
if the time satisfies one or more first predetermined conditions, generate the threshold signal equal to the determined first threshold signal value so that the threshold signal is constant in magnitude as a function of the time; and
if the time satisfies one or more second predetermined conditions, generate the threshold signal so that the threshold signal decreases with the increasing time in magnitude.

US Pat. No. 10,165,646

SYSTEMS AND METHODS FOR OVERVOLTAGE PROTECTION FOR LED LIGHTING

On-Bright Electronics (Sh...

1. A system controller for a power converter, the system controller comprising:a logic controller configured to generate a modulation signal;
a driver configured to receive the modulation signal, generate a drive signal based at least in part on the modulation signal, and output the drive signal to a switch to affect a current flowing through an inductive winding of a power converter, the inductive winding including a first winding terminal and a second winding terminal, the second winding terminal being at a terminal voltage and coupled to a first diode terminal of a diode, the diode further including a second diode terminal, a voltage difference between the second diode terminal and the first winding terminal being an output voltage of the power converter; and
an overvoltage-protection detector configured to receive a feedback signal and a demagnetization signal, generate a detection signal based at least in part on the feedback signal and the demagnetization signal, and output the detection signal to the logic controller, the feedback signal being equal to the terminal voltage divided by a predetermined constant, the demagnetization signal indicating a demagnetization period for the inductive winding, the detection signal indicating whether an overvoltage protection is triggered;
wherein the logic controller is configured to, in response to the detection signal indicating the overvoltage protection is triggered, cause the power converter to shut down;
wherein the overvoltage-protection detector includes:
a sample-and-hold circuit configured to receive the feedback signal and generate a sampled-and-held signal based at least in part on the feedback signal;
a voltage-to-voltage converter configured to receive the sampled-and-held signal and the demagnetization signal and generate a first voltage signal based at least in part on the sampled-and-held signal and the demagnetization signal; and
a comparator configured to receive a first threshold signal and generate the detection signal based on at least information associated with the first voltage signal and the first threshold signal.

US Pat. No. 10,154,554

SYSTEMS AND METHODS FOR CURRENT REGULATION IN LIGHT-EMITTING-DIODE LIGHTING SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating a current flowing through one or more light emitting diodes, the system controller comprising:an error amplifier configured to receive a first voltage related to a first current flowing out of a first controller terminal and generate a second voltage based at least in part on the first voltage;
a clock-signal generator configured to receive the second voltage and generate a clock signal based at least in part on the second voltage, the clock signal being associated with an operating frequency of the system controller; and
a driver configured to generate a drive signal associated with the operating frequency and output the drive signal to affect a second current flowing through one or more light emitting diodes;
wherein the system controller is further configured to:
keep the operating frequency unchanged at a first frequency magnitude in response to the second voltage changing if the second voltage remains smaller than a first voltage magnitude;
keep the operating frequency unchanged at a second frequency magnitude in response to the second voltage changing if the second voltage remains larger than a second voltage magnitude; and
change the operating frequency in response to the second voltage changing if the second voltage remains larger than the first voltage magnitude and smaller than the second voltage magnitude;
wherein the second voltage magnitude is larger than the first voltage magnitude.

US Pat. No. 10,116,220

SYSTEMS AND METHODS FOR PROTECTING POWER CONVERSION SYSTEMS UNDER OPEN AND/OR SHORT CIRCUIT CONDITIONS

On-Bright Electronics (Sh...

1. A system for protecting a power converter, the system comprising:an off-time signal generator configured to receive a first comparison signal and generate an off-time signal based at least in part on the first comparison signal, the first comparison signal being associated with a sensing signal and a first threshold signal, the sensing signal being associated with at least a primary current flowing through a primary winding and a switch of a power converter, the power converter being associated with a switching frequency;
wherein the off-time signal generator is further configured to, in response to the first comparison signal indicating that the sensing signal associated with at least the primary current flowing through the primary winding and the switch of the power converter is larger than the first threshold signal in magnitude, generate the off-time signal to keep the switch to be turned off for at least a predetermined period of time, the predetermined period of time extending beyond at least a beginning of a next switching period corresponding to the switching frequency.

US Pat. No. 9,972,994

SYSTEMS AND METHODS FOR OVER-TEMPERATURE PROTECTION AND OVER-VOLTAGE PROTECTION FOR POWER CONVERSION SYSTEMS

ON-BRIGHT ELECTRONICS (SH...

11. A system for protecting a power conversion system, the system comprising:a system controller including a first controller terminal configured to provide a drive signal to close and open a switch to affect a first current flowing through a primary winding of a power conversion system, and a second controller terminal configured to receive one or more input signals, the power conversion system further including a secondary winding and an auxiliary winding, the primary winding coupled to the secondary winding;
a first resistor including a first resistor terminal and a second resistor terminal, the first resistor terminal being directly coupled to the second controller terminal;
one or more first diodes including a first diode terminal and a second diode terminal, a first diode terminal being coupled to the second controller terminal; and
a second resistor including a third resistor terminal and a fourth resistor terminal, the third resistor terminal being coupled to the second diode terminal;
wherein the second resistor terminal is directly coupled to the auxiliary winding and is configured to receive an output signal associated with the auxiliary winding coupled to the secondary winding.

US Pat. No. 9,966,860

SYSTEMS AND METHODS FOR REDUCING STANDBY POWER CONSUMPTION OF SWITCH-MODE POWER CONVERTERS

ON-BRIGHT ELECTRONICS (SH...

1. A power conversion system, the system comprising:a first capacitor including a first capacitor terminal and a second capacitor terminal;
a second capacitor including a third capacitor terminal and a fourth capacitor terminal;
a plurality of diodes including a first diode, a second diode, a third diode, and a fourth diode, the first diode being coupled to the second diode at a first node, the second diode being coupled to the fourth diode at a second node, the fourth diode being coupled to the third diode at a third node, the third diode being coupled to the first diode at a fourth node;
a fifth diode including a first anode and a first cathode, the first anode being connected to a first input terminal;
a sixth diode including a second anode and a second cathode, the second anode being connected to a second input terminal, the first cathode and the second cathode being connected to a fifth node;
a system controller including a first controller terminal, a second controller terminal, a third controller terminal, a fourth controller terminal, and a fifth controller terminal;
a primary winding including a first winding terminal and a second winding terminal;
a secondary winding coupled to the primary winding;
an auxiliary winding coupled to the secondary winding; and
a switch including a first switch terminal and a second switch terminal;
wherein:
the first node is connected to the first input terminal;
the second node is connected to the first winding terminal;
the third node is connected to the second input terminal;
the fourth node is biased to a predetermined voltage;
the fifth node is connected to the first controller terminal;
the second controller terminal is directly connected to the second input terminal;
the third controller terminal is biased to the predetermined voltage;
the fourth controller terminal is connected to the third capacitor terminal;
the fourth capacitor terminal is biased to the predetermined voltage;
the first capacitor terminal is connected to the first input terminal;
the second capacitor terminal is connected to the second input terminal;
the first switch terminal is connected to the fifth controller terminal; and
the second switch terminal is connected to the second winding terminal;
wherein:
the first input terminal and the second input terminal are configured to receive an input voltage; and
the secondary winding is configured to generate an output voltage based on at least information associated with the input voltage.

US Pat. No. 10,194,500

SYSTEMS AND METHODS FOR DIMMING CONTROL USING TRIAC DIMMERS

On-Bright Electronics (Sh...

1. A system for dimming control of one or more light emitting diodes, the system comprising:one or more signal processing components configured to receive a first signal associated with a TRIAC dimmer, process information associated with the first signal, determine whether the TRIAC dimmer is in a first condition or a second condition, generate a second signal based on at least information associated with the first signal, and send the second signal to a switch;
wherein the one or more signal processing components are further configured to:
if the TRIAC dimmer is determined to be in the first condition, generate the second signal to cause the switch to be opened and closed corresponding to a modulation frequency; and
if the TRIAC dimmer is determined to be in the second condition, generate the second signal to cause the switch to remain closed for a first period of time until at least the TRIAC dimmer changes from the second condition to the first condition.

US Pat. No. 10,027,222

SYSTEM AND METHOD PROVIDING OVER CURRENT PROTECTION BASED ON DUTY CYCLE INFORMATION FOR POWER CONVERTER

On-Bright Electronics (Sh...

1. A system controller for protecting a power converter, the system controller comprising:a signal generator configured to generate a threshold signal;
a comparator configured to receive the threshold signal and a current sensing signal and generate a comparison signal based on at least information associated with the threshold signal and the current sensing signal, the current sensing signal indicating a magnitude of a primary current flowing through a primary winding of a power converter; and
a modulation and drive component coupled to the signal generator and configured to receive at least the comparison signal, generate a drive signal based on at least information associated with the comparison signal, and output the drive signal to a switch in order to affect the primary current, the drive signal being associated with one or more first switching periods and a second switching period following the one or more first switching periods, the one or more first switching periods corresponding to one or more first duty cycles, the second switching period including an on-time period and an off-time period;
wherein the signal generator is further configured to, for the second switching period,
determine a first threshold signal value based on at least information associated with the one or more first duty cycles;
set a time to zero at a beginning of the on-time period;
if the time satisfies one or more first predetermined conditions, generate the threshold signal equal to the determined first threshold signal value so that the threshold signal is constant in magnitude as a function of the time; and
if the time satisfies one or more second predetermined conditions, generate the threshold signal so that the threshold signal decreases with the increasing time in magnitude.

US Pat. No. 9,906,144

SYSTEMS AND METHODS FOR PROTECTING POWER CONVERSION SYSTEMS FROM THERMAL RUNAWAY

On-Bright Electronics (Sh...

1. A system controller for protecting a power conversion system, the system controller comprising:
a protection component configured to receive a feedback signal, a reference signal, and a demagnetization signal generated
based at least in part on the feedback signal and to generate a protection signal based at least in part on the feedback signal,
the reference signal, and the demagnetization signal, the demagnetization signal being related to multiple demagnetization
periods of the power conversion system, the multiple demagnetization periods including a first demagnetization period and
a second demagnetization period;

wherein the protection component is further configured to:
process the feedback signal and the reference signal during a first detection period, the first detection period including
a first starting time and a first ending time, the first starting time being at or after a first demagnetization end of the
first demagnetization period;

determine, during the first detection period, a first number of times that the feedback signal changes from being smaller
than the reference signal to being larger than the reference signal in magnitude; and

determine whether the first number of times exceeds a predetermined threshold at the first ending time;
wherein the system controller is configured to, in response to the first number of times not exceeding the predetermined threshold
at the first ending time, output a drive signal to cause a switch to open and remain open in order to protect the power conversion
system, the switch being configured to affect a current flowing through a primary winding of the power conversion system.

US Pat. No. 10,231,296

TWO-TERMINAL INTEGRATED CIRCUITS WITH TIME-VARYING VOLTAGE-CURRENT CHARACTERISTICS INCLUDING PHASED-LOCKED POWER SUPPLIES

On-Bright Electronics (Sh...

1. A two-terminal IC chip, the chip comprising:a first chip terminal;
a second chip terminal;
a first switch configured to receive a first signal;
a first capacitor coupled to the first switch;
a second switch configured to receive the first signal;
a second capacitor coupled to the second switch;
a third switch configured to receive the first signal; and
a third capacitor coupled to the third switch;
wherein the first capacitor is configured to:
in response to the first switch being closed, receive a first supply voltage through the first switch during a first time duration;
in response to the first switch being open, not store any additional power and not allow first stored power to leak out through the first switch during a second time duration; and
output a first output voltage during the first time duration and the second time duration;
wherein the second capacitor is configured to:
in response to the second switch being closed, receive the first supply voltage through the second switch during the first time duration;
in response to the second switch being open, not store any additional power and not allow second stored power to leak out through the second switch during the second time duration; and
output a second output voltage during the first time duration and the second time duration;
wherein the third capacitor is configured to:
in response to the third switch being closed, receive a second supply voltage through the third switch during the first time duration;
in response to the third switch being open, not store any additional power and not allow third stored power to leak out through the third switch during the second time duration; and
output a third output voltage during the first time duration and the second time duration;
wherein:
the chip includes an integrated circuit; and
the chip does not include any additional chip terminal other than the first chip terminal and the second chip terminal.

US Pat. No. 10,186,856

SYSTEM AND METHOD PROVIDING RELIABLE OVER CURRENT PROTECTION FOR POWER CONVERTER

On-Bright Electronics (Sh...

21. A system controller for a power converter, the system controller comprising:a modulation signal generator configured to generate a modulation signal, the modulation signal being associated with one or more switching periods; and
a demagnetization signal generator configured to receive the modulation signal from the modulation signal generator, output a current to a controller terminal, and generate a demagnetization signal based at least in part on the modulation signal and the current;
wherein, for each switching period of the one or more switching periods,
the demagnetization signal represents a demagnetization period related to a demagnetization process; and
the demagnetization signal is at a first logic level during the demagnetization period and at a second logic level outside the demagnetization period.

US Pat. No. 10,097,098

SYSTEMS AND METHODS WITH TIMING CONTROL FOR SYNCHRONIZATION RECTIFIER CONTROLLERS

On-Bright Electronics (Sh...

1. A system controller for regulating a power converter, the system controller comprising:a first controller terminal; and
a second controller terminal;
wherein the system controller is configured to:
receive, at the first controller terminal, an input signal;
generate a drive signal based at least in part on the input signal, the drive signal being associated with an on-time period and an off-time period, the on-time period including a first beginning and a first end; and
output, at the second controller terminal, the drive signal to a switch to close the switch during the on-time period and open the switch during the off-time period to affect a current associated with a secondary winding of the power converter;
wherein the system controller is further configured to:
detect a demagnetization period associated with the secondary winding based at least in part on the input signal, the demagnetization period including a second beginning and a second end, the second beginning being the same as the first beginning, the second end following the first end;
determine a time duration from the first end to the second end, the time duration minus a first predetermined duration being equal to a duration difference; and
increase the on-time period from a first duration to a second duration based at least in part on the duration difference.

US Pat. No. 10,008,939

SYSTEMS AND METHODS FOR PROTECTING POWER CONVERSION SYSTEMS BASED ON AT LEAST FEEDBACK SIGNALS

On-Bright Electronics (Sh...

1. A system controller for protecting a power conversion system, the system controller comprising:a protection component configured to receive a demagnetization signal generated based on at least information associated with a feedback signal of the power conversion system, process information associated with the demagnetization signal and a detected voltage generated based on the at least information associated with the feedback signal, and generate a protection signal based on at least information associated with the detected voltage and the demagnetization signal; and
a driving component configured to receive the protection signal and output a driving signal to a switch configured to affect a primary current flowing through a primary winding of the power conversion system;
wherein:
the detected voltage is related to an output voltage of the power conversion system; and
the demagnetization signal is related to a demagnetization period of the power conversion system;
wherein the protection component and the driving component are further configured to, if the detected voltage and the demagnetization signal satisfy one or more conditions, output the driving signal to cause the switch to open and remain open in order to protect the power conversion system; and
wherein the detected voltage and the demagnetization signal satisfy the one or more conditions if the demagnetization period is smaller in duration than a threshold time period corresponding to the detected voltage.

US Pat. No. 9,991,802

SYSTEMS AND METHODS FOR REGULATING OUTPUT CURRENTS OF POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system for a power converter, the system comprising:a comparator configured to receive a ramping signal and a compensation signal and output a comparison signal based at least in part on the ramping signal and the compensation signal, the ramping signal being associated with a jittering signal and corresponding to a ramping slope, the jittering signal being associated with multiple jittering cycles corresponding to a predetermined jittering frequency related to a predetermined jittering period, the compensation signal being associated with a current flowing through a primary winding of a power converter; and
a driver configured to generate a drive signal based at least in part on the comparison signal and output the drive signal to a switch to affect the current, the drive signal being associated with multiple modulation cycles corresponding to a modulation frequency related to a modulation period;
wherein the system is further configured to:
change the ramping slope based at least in part on the jittering signal so that, within a same jittering cycle of the multiple jittering cycles, the ramping slope is changed by different magnitudes corresponding to the multiple modulation cycles respectively; and
adjust the modulation frequency based at least in part on the changed ramping slope.

US Pat. No. 10,299,334

SYSTEMS AND METHODS FOR STAGE-BASED CONTROL RELATED TO TRIAC DIMMERS

On-Bright Electronics (Sh...

1. A system controller for a lighting system, the system controller comprising:a first controller terminal configured to receive a first signal, the first signal being related to a dimming-control phase angle;
a second controller terminal coupled to a first transistor terminal of a transistor, the transistor further including a second transistor terminal and a third transistor terminal, the second transistor terminal being coupled to a winding;
a third controller terminal coupled to the third transistor terminal of the transistor; and
a fourth controller terminal coupled to a resistor and configured to receive a second signal, the second signal representing a magnitude of a current flowing through at least the winding, the third controller terminal, the fourth controller terminal, and the resistor;
wherein the system controller is configured to, in response to the first signal satisfying one or more predetermined conditions:
cause the second signal to ramp up and down during a first duration of time, the first duration of time starting at a first time and ending at a second time, the second time being the same as or later than the first time; and
cause the second signal to ramp up and down during a second duration of time, the second duration of time starting at a third time and ending at a fourth time, the fourth time being the same as or later than the third time;
wherein the system controller is further configured to:
in response to the dimming-control phase angle increasing from a first angle magnitude to a second angle magnitude, keep the first duration of time at a first predetermined constant;
in response to the dimming-control phase angle increasing from the second angle magnitude to a third angle magnitude, increase the first duration of time; and
in response to the dimming-control phase angle increasing from the third angle magnitude to a fourth angle magnitude, keep the first duration of time at a second predetermined constant.

US Pat. No. 10,244,592

SYSTEMS AND METHODS FOR CURRENT REGULATION IN LIGHT-EMITTING-DIODE LIGHTING SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating a current flowing through one or more light emitting diodes, the system controller comprising:an error amplifier configured to receive a first voltage related to a first current flowing out of a first controller terminal and generate a second voltage based at least in part on the first voltage;
a clock-signal generator configured to receive the second voltage and generate a clock signal based at least in part on the second voltage, the clock signal being associated with an operating frequency of the system controller; and
a driver configured to generate a drive signal associated with the operating frequency and output the drive signal to affect a second current flowing through one or more light emitting diodes;
wherein the system controller is further configured to:
keep the operating frequency unchanged at a first frequency magnitude in response to the second voltage changing if the second voltage remains smaller than a first voltage magnitude;
keep the operating frequency unchanged at a second frequency magnitude in response to the second voltage changing if the second voltage remains larger than a second voltage magnitude; and
change the operating frequency in response to the second voltage changing if the second voltage remains larger than the first voltage magnitude and smaller than the second voltage magnitude;
wherein the second voltage magnitude is larger than the first voltage magnitude.

US Pat. No. 10,244,593

SYSTEMS AND METHODS FOR CURRENT REGULATION IN LIGHT-EMITTING-DIODE LIGHTING SYSTEMS

On-Bright Electronics (Sh...

1. A system controller comprising:a first controller terminal configured to allow a first current to flow out of the system controller through the first controller terminal to a resistor associated with a resistance, the first controller terminal being further configured to receive a voltage signal based at least in part on the first current and the resistance, the resistor not being any part of the system controller;
wherein the system controller is configured to process the received voltage signal, generate a clock signal associated with an operating frequency based at least in part on the voltage signal, generate a ramp signal based at least in part on the voltage signal, and change the operating frequency based at least in part on the resistance;
wherein the first current is generated by a current source component at a predetermined magnitude.

US Pat. No. 10,182,478

SYSTEMS AND METHODS FOR CURRENT REGULATION IN LIGHT-EMITTING-DIODE LIGHTING SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating a current flowing through one or more light emitting diodes, the system controller comprising:an error amplifier configured to receive a first voltage related to a first current flowing out of a first controller terminal and generate a second voltage based at least in part on the first voltage;
a clock-signal generator configured to receive the second voltage and generate a clock signal based at least in part on the second voltage, the clock signal being associated with an operating frequency of the system controller; and
a driver configured to generate a drive signal associated with the operating frequency and output the drive signal to affect a second current flowing through one or more light emitting diodes;
wherein the system controller is further configured to:
keep the operating frequency unchanged at a first frequency magnitude in response to the second voltage changing if the second voltage remains smaller than a first voltage magnitude;
keep the operating frequency unchanged at a second frequency magnitude in response to the second voltage changing if the second voltage remains larger than a second voltage magnitude; and
change the operating frequency in response to the second voltage changing if the second voltage remains larger than the first voltage magnitude and smaller than the second voltage magnitude;
wherein the second voltage magnitude is larger than the first voltage magnitude.

US Pat. No. 10,097,080

SYSTEM AND METHOD PROVIDING OVER CURRENT PROTECTION BASED ON DUTY CYCLE INFORMATION FOR POWER CONVERTER

On-Bright Electronics (Sh...

1. A system controller for protecting a power converter, the system controller comprising:a signal generator configured to generate a threshold signal;
a comparator configured to receive the threshold signal and a current sensing signal and generate a comparison signal based on at least information associated with the threshold signal and the current sensing signal, the current sensing signal indicating a magnitude of a primary current flowing through a primary winding of a power converter; and
a modulation and drive component coupled to the signal generator and configured to receive at least the comparison signal, generate a drive signal based on at least information associated with the comparison signal, and output the drive signal to a switch in order to affect the primary current, the drive signal being associated with one or more first switching periods and a second switching period following the one or more first switching periods, the one or more first switching periods corresponding to one or more first duty cycles, the second switching period including an on-time period and an off-time period;
wherein the signal generator is further configured to, for the second switching period,
determine a first threshold signal value based on at least information associated with the one or more first duty cycles;
set a time to zero at a beginning of the on-time period;
if the time satisfies one or more first predetermined conditions, generate the threshold signal equal to the determined first threshold signal value so that the threshold signal is constant in magnitude as a function of the time; and
if the time satisfies one or more second predetermined conditions, generate the threshold signal so that the threshold signal decreases with the increasing time in magnitude.

US Pat. No. 10,069,424

SYSTEMS AND METHODS FOR VOLTAGE CONTROL AND CURRENT CONTROL OF POWER CONVERSION SYSTEMS WITH MULTIPLE OPERATION MODES

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:a driver component configured to output a drive signal in order to affect an output signal of the power conversion system, the drive signal being associated with a switching frequency corresponding to a switching period, the switching period including an on-time period and a demagnetization period;
a first sample-and-hold component including a first capacitor and configured to sample and hold a current sensing signal associated with a primary current flowing through a primary winding of the power conversions system at at least a first time during the on-time period and generate a first held sampled signal based on at least information associated with the current sensing signal;
a second sample-and-hold component including a second capacitor and configured to sample and hold the current sensing signal at at least a second time during the on-time period and generate a second held sampled signal based on at least information associated with the current sensing signal, the second time being later than the first time;
a first switch including a first switch terminal and a second switch terminal, the first switch terminal being coupled to the first capacitor, the second switch terminal being coupled to the second capacitor, the first switch being further configured to be closed during the demagnetization period and open during the on-time period;
a second switch including a third switch terminal and a fourth switch terminal, the third switch terminal being coupled to the first switch terminal, the second switch being further configured to be closed during the demagnetization period and open during the on-time period; and
a signal processing component configured to receive a combined signal from the fourth switch terminal if the first switch and the second switch are closed and output a processed signal based on at least information associated with the combined signal to the driver component.

US Pat. No. 10,244,598

LED LIGHTING SYSTEMS AND METHODS FOR CONSTANT CURRENT CONTROL IN VARIOUS OPERATION MODES

On-Bright Electronics (Sh...

1. A system for providing at least an output current to one or more light emitting diodes, the system comprising:a first sampling-and-holding and voltage-to-current-conversion component configured to receive at least a sensed signal and generate a first current signal, the sensed signal being associated with an inductor current flowing through an inductor coupled to a first switch;
a second sampling-and-holding and voltage-to-current-conversion component configured to receive at least the sensed signal and generate a second current signal;
a signal-amplification and voltage-to-current-conversion component configured to receive at least the sensed signal and generate a third current signal;
a current-signal generator configured to generate a fourth current signal;
a capacitor coupled to the current-signal generator, coupled through a second switch to the first sampling-and-holding and voltage-to-current-conversion component and the second sampling-and-holding and voltage-to-current-conversion component, and coupled through a third switch to the signal-amplification and voltage-to-current-conversion component, the capacitor being configured to generate a first voltage signal;
a multiplier component configured to process information associated with the first voltage signal and a second voltage signal and generate a multiplication signal based on at least information associated with the first voltage signal and the second voltage signal;
a comparator configured to receive the multiplication signal and the sensed signal and generate a comparison signal based on at least information associated with the multiplication signal and the sensed signal;
a modulation-signal generator configured to receive at least the comparison signal and generate a modulation signal; and
a gate driver configured to receive the modulation signal and output a drive signal to the first switch;
wherein:
the drive signal is associated with at least a plurality of switching periods, each switching period of the plurality more switching periods including at least an on-time period for the first switch and a demagnetization period for a demagnetization process;
the first current signal represents the inductor current at the beginning of the on-time period;
the second current signal represents the inductor current at an end of the on-time period; and
the third current signal represents the inductor current;
wherein for each switching period of the plurality of switching periods,
the first current signal and the second current signal are configured to discharge or charge the capacitor during only the demagnetization period;
the third current signal is configured to discharge or charge the capacitor during only the on-time period; and
the fourth current signal is configured to charge or discharge the capacitor during the switching period.

US Pat. No. 10,177,665

SYSTEMS AND METHODS FOR HIGH PRECISION AND/OR LOW LOSS REGULATION OF OUTPUT CURRENTS OF POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. An error amplifier for a reference signal and an input signal associated with a current of a power converter, the error amplifier comprising:a first operational amplifier including a first input terminal, a second input terminal and a first output terminal, the first input terminal being configured to receive a reference signal, the first output terminal configured to output a first amplified signal to a first transistor terminal of a first transistor, the first transistor further including a second transistor terminal and a third transistor terminal, and the second input terminal being coupled to the third transistor terminal;
a second operational amplifier including a third input terminal, a fourth input terminal and a second output terminal, the third input terminal being configured to receive an input signal associated with a first current flowing through a primary winding of a power converter, the second output terminal configured to output a second amplified signal to a fourth transistor terminal of a second transistor, the second transistor further including a fifth transistor terminal and a sixth transistor terminal, and the fourth input terminal being coupled to the sixth transistor terminal;
a current mirror including a first mirror terminal and a second mirror terminal, the first mirror terminal being coupled to the second transistor terminal;
a switch including a first switch terminal and a second switch terminal, the first switch terminal being coupled to the second mirror terminal, the second switch terminal being coupled to the fifth transistor terminal;
a first resistor including a first resistor terminal and a second resistor terminal, the first resistor being associated with a first resistance, the first resistor terminal being coupled to the second input terminal; and
a second resistor including a third resistor terminal and a fourth resistor terminal, the second resistor being associated with a second resistance, the third resistor terminal being coupled to the fourth input terminal;
wherein:
the first resistance is larger than the second resistance in magnitude; and
the error amplifier is configured to output a first output signal based at least in part on the reference signal and the input signal.

US Pat. No. 10,148,189

SYSTEMS AND METHODS WITH TIMING CONTROL FOR SYNCHRONIZATION RECTIFIER CONTROLLERS

On-Bright Electronics (Sh...

1. A system controller for regulating a power converter, the system controller comprising:a first controller terminal; and
a second controller terminal;
wherein the system controller is configured to:
receive, at the first controller terminal, an input signal;
generate a drive signal based at least in part on the input signal, the drive signal being associated with an on-time period and an off-time period, the on-time period including a first beginning and a first end; and
output, at the second controller terminal, the drive signal to a switch to close the switch during the on-time period and open the switch during the off-time period to affect a current associated with a secondary winding of the power converter;
wherein the system controller is further configured to:
detect a demagnetization period associated with the secondary winding based at least in part on the input signal, the demagnetization period including a second beginning and a second end, the second beginning being the same as the first beginning, the second end following the first end;
determine a time duration from the first end to the second end, the time duration minus a first predetermined duration being equal to a duration difference; and
increase the on-time period from a first duration to a second duration based at least in part on the duration difference.

US Pat. No. 10,110,133

SYSTEMS AND METHODS FOR REGULATING POWER CONVERSION SYSTEMS WITH OUTPUT DETECTION AND SYNCHRONIZED RECTIFYING MECHANISMS

On-Bright Electronics (Sh...

22. A system for regulating a power converter, the system comprising:a first system controller configured to:
generate a first drive signal based at least in part on an input signal to turn on or off a transistor to affect a first current associated with the secondary winding of the power converter; and
a second system controller configured to:
generate a second drive signal based at least in part on a feedback signal; and
output the second drive signal to a switch to affect a second current flowing through a primary winding of the power converter;
wherein:
the first system controller is further configured to, in response to the input signal indicating that an output voltage changes from a first value larger than a first threshold to a second value smaller than the first threshold, generate one or more pulses of the first drive signal to turn on and off the transistor; and
the second system controller is further configured to:
process the feedback signal to detect the one or more pulses of the first drive signal; and
in response to the one or more pulses of the first drive signal being detected, increase a switching frequency associated with the second drive signal;
wherein the second system controller includes:
a detector configured to receive the feedback signal, detect the one or more pulses of the first drive signal based at least in part on the feedback signal, and output a detection signal based at least in part on the detected one or more pulses;
a signal generator configured to receive the detection signal and output a modulation signal based at least in part on the detection signal; and
a driver configured to receive the modulation signal and output the second drive signal to the switch.

US Pat. No. 10,334,679

SYSTEMS AND METHODS FOR STAGE-BASED CONTROL RELATED TO TRIAC DIMMERS

On-Bright Electronics (Sh...

1. A system controller for a lighting system, the system controller comprising:a first controller terminal configured to receive a first signal, the first signal being related to a dimming-control phase angle;
a second controller terminal coupled to a first transistor terminal of a transistor, the transistor further including a second transistor terminal and a third transistor terminal, the second transistor terminal being coupled to a winding;
a third controller terminal coupled to the third transistor terminal of the transistor; and
a fourth controller terminal coupled to a resistor and configured to receive a second signal, the second signal representing a magnitude of a current flowing through at least the winding, the third controller terminal, the fourth controller terminal, and the resistor;
wherein the system controller is configured to, in response to the first signal satisfying one or more predetermined conditions:
cause the second signal to ramp up and down during a first duration of time, the first duration of time starting at a first time and ending at a second time, the second time being the same as or later than the first time; and
cause the second signal to ramp up and down during a second duration of time, the second duration of time starting at a third time and ending at a fourth time, the fourth time being the same as or later than the third time;
wherein the system controller is further configured to:
in response to the dimming-control phase angle increasing from a first angle magnitude to a second angle magnitude, keep the first duration of time at a first predetermined constant;
in response to the dimming-control phase angle increasing from the second angle magnitude to a third angle magnitude, increase the first duration of time; and
in response to the dimming-control phase angle increasing from the third angle magnitude to a fourth angle magnitude, keep the first duration of time at a second predetermined constant.

US Pat. No. 10,212,768

SYSTEMS AND METHODS FOR CURRENT REGULATION IN LIGHT-EMITTING-DIODE LIGHTING SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating a current flowing through one or more light emitting diodes, the system controller comprising:an error amplifier configured to receive a first voltage related to a first current flowing out of a first controller terminal and generate a second voltage based at least in part on the first voltage;
a clock-signal generator configured to receive the second voltage and generate a clock signal based at least in part on the second voltage, the clock signal being associated with an operating frequency of the system controller; and
a driver configured to generate a drive signal associated with the operating frequency and output the drive signal to affect a second current flowing through one or more light emitting diodes;
wherein the system controller is further configured to:
keep the operating frequency unchanged at a first frequency magnitude in response to the second voltage changing if the second voltage remains smaller than a first voltage magnitude;
keep the operating frequency unchanged at a second frequency magnitude in response to the second voltage changing if the second voltage remains larger than a second voltage magnitude; and
change the operating frequency in response to the second voltage changing if the second voltage remains larger than the first voltage magnitude and smaller than the second voltage magnitude;
wherein the second voltage magnitude is larger than the first voltage magnitude.

US Pat. No. 10,212,783

SYSTEMS AND METHODS FOR OVERVOLTAGE PROTECTION FOR LED LIGHTING

On-Bright Electronics (Sh...

1. A system controller for a power converter, the system controller comprising:a logic controller configured to generate a modulation signal;
a driver configured to receive the modulation signal, generate a drive signal based at least in part on the modulation signal, and output the drive signal to a switch to affect a current flowing through an inductive winding of a power converter, the inductive winding including a first winding terminal and a second winding terminal, the second winding terminal being at a terminal voltage and coupled to a first diode terminal of a diode, the diode further including a second diode terminal, a voltage difference between the second diode terminal and the first winding terminal being an output voltage of the power converter; and
an overvoltage-protection detector configured to receive a feedback signal and a demagnetization signal, generate a detection signal based at least in part on the feedback signal and the demagnetization signal, and output the detection signal to the logic controller, the feedback signal being equal to the terminal voltage divided by a predetermined constant, the demagnetization signal indicating a demagnetization period for the inductive winding, the detection signal indicating whether an overvoltage protection is triggered;
wherein the logic controller is configured to, in response to the detection signal indicating the overvoltage protection is triggered, cause the power converter to shut down;
wherein the overvoltage-protection detector includes:
a sample-and-hold circuit configured to receive the feedback signal and generate a sampled-and-held signal based at least in part on the feedback signal;
a voltage-to-voltage converter configured to receive the sampled-and-held signal and the demagnetization signal and generate a first voltage signal based at least in part on the sampled-and-held signal and the demagnetization signal; and
a comparator configured to receive a first threshold signal and generate the detection signal based on at least information associated with the first voltage signal and the first threshold signal.

US Pat. No. 10,193,510

SWITCHING CONTROLLERS AND METHODS FOR LOADS

On-Bright Electronics (Sh...

1. A system controller for providing at least an output voltage, the system controller comprising:a first controller terminal configured to receive an input voltage, the input voltage being associated with an input-voltage magnitude;
a second controller terminal configured to receive a control voltage;
a third controller terminal configured to output an output voltage to a load;
a supply voltage generator configured to receive the input voltage from the first controller terminal and generate a supply voltage, the supply voltage being associated with a supply voltage magnitude; and
a ramp voltage generator configured to receive the supply voltage and generate a ramp voltage;
wherein, if the control voltage is at a first logic level,
the ramp voltage increases from zero to the supply voltage magnitude at a first rate of change during a first time duration; and
the output voltage increases from zero to the input-voltage magnitude at a second rate of change during a second time duration;
wherein the second rate of change is equal to the first rate of change multiplied by a predetermined constant.

US Pat. No. 10,181,795

SYSTEMS AND METHODS FOR POWER CONVERTERS WITH SELF-REGULATED POWER SUPPLIES

On-Bright Electronics (Sh...

1. A controller for a power converter, the controller comprising:a first controller terminal coupled to a gate terminal of a transistor, the transistor further including a drain terminal and a source terminal, the first controller terminal being at a first voltage as a first function of time;
a second controller terminal coupled to the source terminal, the second controller terminal being at a second voltage as a second function of time;
a third controller terminal coupled to a first resistor terminal of a resistor, the resistor further including a second resistor terminal, the third controller terminal being at a third voltage as a third function of time; and
a fourth controller terminal coupled to a first capacitor terminal of a capacitor, the capacitor further including a second capacitor terminal, the fourth controller terminal being at a fourth voltage as a fourth function of time;
wherein, from a first time to a second time,
the first voltage remains at a first magnitude;
the second voltage increases from a second magnitude to a third magnitude;
the third voltage remains at a fourth magnitude; and
the fourth voltage increases from a fifth magnitude to a sixth magnitude;
wherein, from the second time to a third time,
the first voltage remains at the first magnitude;
the second voltage remains at the third magnitude;
the third voltage remains at the fourth magnitude; and
the fourth voltage remains at the sixth magnitude;
wherein, at the first time,
the first voltage is at the first magnitude;
the second voltage drops from a seventh magnitude to the second magnitude, the seventh magnitude being larger than the second magnitude;
the third voltage is at the fourth magnitude; and
the fourth voltage is at the fifth magnitude;
wherein:
the second time is after the first time; and
the third time is after the second time or is the same as the second time.

US Pat. No. 10,170,999

SYSTEMS AND METHODS FOR REGULATING OUTPUT CURRENTS OF POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for a power converter, the system controller comprising:a modulation signal generator configured to receive a first compensation signal and a ramping signal and generate a modulation signal based at least in part on the first compensation signal and the ramping signal, the first compensation signal being associated with a converted signal and a second compensation signal, the converted signal being associated with an input signal for a power converter, the second compensation signal being associated with a sensing signal related to a first current flowing through a primary winding of the power converter; and
a drive signal generator configured to receive the modulation signal and output a drive signal to affect the first current, the drive signal being associated with an on-time period, a switch being closed during the on-time period;
wherein the system controller is configured to adjust a duration of the on-time period based at least in part on the converted signal and the first compensation signal.

US Pat. No. 10,334,677

SYSTEMS AND METHODS FOR INTELLIGENT DIMMING CONTROL USING TRIAC DIMMERS

On-Bright Electronics (Sh...

1. An apparatus for a power conversion system, the apparatus comprising:a process-and-drive component configured to receive an input signal and output a drive signal to a switch to affect a current that flows through one or more light emitting diodes, the one or more light emitting diodes being associated with a secondary winding of a power conversion system;
wherein:
the input signal includes a pulse associated with a pulse width;
the process-and-drive component is further configured to:
process information associated with the pulse width; and
generate the drive signal based on at least information associated with the pulse width so that the current changes non-linearly with the pulse width but a brightness of the one or more light emitting diodes changes linearly with the pulse width.

US Pat. No. 10,314,130

LED LIGHTING SYSTEMS AND METHODS FOR CONSTANT CURRENT CONTROL IN VARIOUS OPERATION MODES

On-Bright Electronics (Sh...

1. A system for providing at least an output current to one or more light emitting diodes, the system comprising:a first sampling-and-holding and voltage-to-current-conversion component configured to receive at least a sensed signal and generate a first current signal, the sensed signal being associated with an inductor current flowing through an inductor coupled to a first switch;
a second sampling-and-holding and voltage-to-current-conversion component configured to receive at least the sensed signal and generate a second current signal;
a signal-amplification and voltage-to-current-conversion component configured to receive at least the sensed signal and generate a third current signal;
a current-signal generator configured to generate a fourth current signal;
a capacitor coupled to the current-signal generator, coupled through a second switch to the first sampling-and-holding and voltage-to-current-conversion component and the second sampling-and-holding and voltage-to-current-conversion component, and coupled through a third switch to the signal-amplification and voltage-to-current-conversion component, the capacitor being configured to generate a first voltage signal;
a multiplier component configured to process information associated with the first voltage signal and a second voltage signal and generate a multiplication signal based on at least information associated with the first voltage signal and the second voltage signal;
a comparator configured to receive the multiplication signal and the sensed signal and generate a comparison signal based on at least information associated with the multiplication signal and the sensed signal;
a modulation-signal generator configured to receive at least the comparison signal and generate a modulation signal; and
a gate driver configured to receive the modulation signal and output a drive signal to the first switch;
wherein:
the drive signal is associated with at least a plurality of switching periods, each switching period of the plurality of switching periods including at least an on-time period for the first switch and a demagnetization period for a demagnetization process;
the first current signal represents the inductor current at the beginning of the on-time period;
the second current signal represents the inductor current at an end of the on-time period; and
the third current signal represents the inductor current;
wherein for each switching period of the plurality of switching periods,
the first current signal and the second current signal are configured to discharge or charge the capacitor during only the demagnetization period;
the third current signal is configured to discharge or charge the capacitor during only the on-time period; and
the fourth current signal is configured to charge or discharge the capacitor during the switching period.

US Pat. No. 10,211,740

SYSTEMS AND METHODS FOR HIGH PRECISION AND/OR LOW LOSS REGULATION OF OUTPUT CURRENTS OF POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:a first controller terminal configured to receive a first voltage associated with a first current, the first current being related to an input voltage of a power conversion system;
a compensation component coupled to the first controller terminal and configured to, if the first voltage satisfies one or more first conditions, generate a compensation current based on at least information associated with the first current;
a second controller terminal coupled to the compensation component and configured to provide a compensation voltage based on at least information associated with the compensation current, the compensation voltage being equal in magnitude to the compensation current multiplied by a compensation resistance, the compensation resistance being associated with a compensation resistor;
a current sensing component configured to receive a second voltage and generate a first output signal, the second voltage being equal to a sum of a third voltage and the compensation voltage in magnitude, the third voltage being proportional to a second current flowing through a primary winding of the power conversion system; and
an error amplifier configured to receive the first output signal and a first reference signal, generate an amplified signal based on at least information associated with the first output signal and the first reference signal, and output the amplified signal to affect a switch associated with the second current.

US Pat. No. 10,211,741

SYSTEMS AND METHODS FOR VOLTAGE REGULATION OF PRIMARY SIDE REGULATED POWER CONVERSION SYSTEMS WITH COMPENSATION MECHANISMS

On-Bright Electronics (Sh...

1. A system controller for a power converter, the system controller comprising:a first signal generator configured to receive a compensation signal and a reference signal and generate a first signal based at least in part on the compensation signal and the reference signal, the first signal being related to a combination of the compensation signal and the reference signal, the compensation signal being related to an on-time period associated with a first switch of the power converter, the first switch being closed during the on-time period;
an error amplifier configured to receive the first signal and a second signal and generate an amplified signal based at least in part on the first signal and the second signal, the second signal being related to a feedback signal of the power converter;
a second signal generator configured to receive the amplified signal and generate a modulation signal based at least in part on the amplified signal; and
a driver configured to receive the modulation signal and output a drive signal based at least in part on the modulation signal;
wherein the system controller is configured to change the drive signal based at least in part on the compensation signal in order to adjust a winding voltage of a winding of the power converter and to at least partially compensate for a change in a forward voltage of a rectifying diode associated with the winding.

US Pat. No. 10,211,626

SYSTEM AND METHOD PROVIDING RELIABLE OVER CURRENT PROTECTION FOR POWER CONVERTER

On-Bright Electronics (Sh...

21. A system controller for a power converter, the system controller comprising:a modulation signal generator configured to generate a modulation signal, the modulation signal being associated with one or more switching periods; and
a demagnetization signal generator configured to receive the modulation signal from the modulation signal generator, output a current to a controller terminal, and generate a demagnetization signal based at least in part on the modulation signal and the current;
wherein, for each switching period of the one or more switching periods,
the demagnetization signal represents a demagnetization period related to a demagnetization process; and
the demagnetization signal is at a first logic level during the demagnetization period and at a second logic level outside the demagnetization period.

US Pat. No. 10,199,934

SYSTEMS AND METHODS FOR OUTPUT CURRENT REGULATION IN POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:a first controller terminal configured to provide a compensation signal based on at least information associated with a first current flowing through an inductive winding of a power converter;
a ramp-current generator configured to receive a modulation signal, the compensation signal and a first reference signal and generate a ramp current based at least in part on the modulation signal, the compensation signal and the first reference signal;
a ramp-signal generator configured to receive the ramp current and generate a ramping signal based at least in part on the ramp current;
a modulation component configured to receive the ramping signal and the compensation signal and generate the modulation signal based at least in part on the ramping signal and the compensation signal; and
a driver configured to generate a drive signal based on at least information associated with the modulation signal and output the drive signal to a switch to affect the first current, the drive signal being associated with a switching period including an on-time period and an off-time period;
wherein:
the switch is closed in response to the drive signal during the on-time period;
the switch is opened in response to the drive signal during the off-time period;
a duty cycle is equal to a duration of the on-time period divided by a duration of the switching period; and
one minus the duty cycle is equal to a parameter;
wherein the ramp-current generator is further configured to generate the ramp current approximately proportional in magnitude to a multiplication product of the duty cycle, the parameter and a difference, the difference representing the first reference signal minus the compensation signal in magnitude.

US Pat. No. 10,199,943

SYSTEMS AND METHODS FOR VOLTAGE REGULATION OF PRIMARY SIDE REGULATED POWER CONVERSION SYSTEMS WITH COMPENSATION MECHANISMS

On-Bright Electronics (Sh...

1. A system for a power converter, the system comprising:a compensation signal generator configured to sample a sensing signal and generate a compensation signal based at least in part on the sensing signal, the sensing signal being associated with a first current flowing through a primary winding of a power converter;
a first signal generator configured to receive a feedback signal and the compensation signal and generate a first signal based at least in part on the feedback signal and the compensation signal, the feedback signal being associated with an auxiliary winding coupled with a secondary winding of the power converter;
an error amplifier configured to receive the first signal and a reference signal and generate an amplified signal based at least in part on the first signal and the reference signal; and
a drive signal generator configured to receive the amplified signal and generate a drive signal based at least in part on the amplified signal to close or open a first switch to affect the first current;
wherein the system is configured to change the drive signal based at least in part on the compensation signal in order to adjust a winding voltage of the secondary winding and to at least partially compensate for a change in a forward voltage of a rectifying diode associated with the secondary winding.

US Pat. No. 10,199,946

SYSTEMS AND METHODS FOR ADJUSTING PEAK FREQUENCIES WITH DUTY CYCLES

On-Bright Electronics (Sh...

1. A system for regulating a power converter, the system comprising:a first terminal configured to output a drive signal to a switch to affect a current flowing through a primary winding of a power converter, the drive signal being associated with a switching period including an on-time period and an off-time period, the switching period corresponding to a switching frequency; and
a second terminal configured to receive a feedback signal associated with an output voltage related to a secondary winding of the power converter;
wherein a duty cycle is related to a duration of the on-time period and a duration of the switching period;
wherein the system is configured to set the switching frequency to one or more frequency magnitudes, each magnitude of the one or more frequency magnitudes being smaller than or equal to an upper frequency limit;
wherein the system is further configured to:
increase the upper frequency limit from a first frequency magnitude to a second frequency magnitude in response to the duty cycle increasing, a magnitude range including the first frequency magnitude and the second frequency magnitude; and
decrease the upper frequency limit from a third frequency magnitude to a fourth frequency magnitude in response to the duty cycle decreasing, the magnitude range including the third frequency magnitude and the fourth frequency magnitude.

US Pat. No. 10,193,443

SYSTEMS AND METHODS FOR ENHANCING DYNAMIC RESPONSE OF POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:a first amplifier configured to receive a reference signal and a feedback signal associated with an output signal of the power conversion system, the first amplifier including an amplifier terminal;
a variable-resistance component associated with a first variable resistance value, the variable-resistance component including a first component terminal and a second component terminal, the first component terminal being coupled with the amplifier terminal;
a first capacitor including a first capacitor terminal and a second capacitor terminal, the first capacitor terminal being coupled with the second component terminal; and
a modulation and drive component including a first terminal and a second terminal, the first terminal being coupled with the amplifier terminal, the modulation and drive component being configured to output a drive signal at the second terminal to a switch in order to affect the output signal of the power conversion system;
wherein the system controller is configured to:
set the first variable resistance value to a first resistance magnitude in order to operate in an on-off mode; and
set the first variable resistance value to a second resistance magnitude in order to operate in an error amplifier mode;
wherein:
the first resistance magnitude is larger than the second resistance magnitude; and
the on-off mode is different from the error amplifier mode.

US Pat. No. 10,193,451

SYSTEMS AND METHODS FOR REGULATING POWER CONVERSION SYSTEMS WITH OUTPUT DETECTION AND SYNCHRONIZED RECTIFYING MECHANISMS

On-Bright Electronics (Sh...

22. A system for regulating a power converter, the system comprising:a first system controller configured to:
generate a first drive signal based at least in part on an input signal to turn on or off a transistor to affect a first current associated with the secondary winding of the power converter; and
a second system controller configured to:
generate a second drive signal based at least in part on a feedback signal; and
output the second drive signal to a switch to affect a second current flowing through a primary winding of the power converter;
wherein:
the first system controller is further configured to, in response to the input signal indicating that an output voltage changes from a first value larger than a first threshold to a second value smaller than the first threshold, generate one or more pulses of the first drive signal to turn on and off the transistor; and
the second system controller is further configured to:
process the feedback signal to detect the one or more pulses of the first drive signal; and
in response to the one or more pulses of the first drive signal being detected, increase a switching frequency associated with the second drive signal;
wherein the second system controller includes:
a detector configured to receive the feedback signal, detect the one or more pulses of the first drive signal based at least in part on the feedback signal, and output a detection signal based at least in part on the detected one or more pulses;
a signal generator configured to receive the detection signal and output a modulation signal based at least in part on the detection signal; and
a driver configured to receive the modulation signal and output the second drive signal to the switch.

US Pat. No. 10,342,087

SYSTEMS AND METHODS FOR INTELLIGENT DIMMING CONTROL USING TRIAC DIMMERS

On-Bright Electronics (Sh...

1. An apparatus for a power converter, the apparatus comprising:a drive signal generator configured to receive an input signal associated with a TRIAC dimmer and output a drive signal to a switch to affect a current that flows through a winding of a power converter;
wherein:
the input signal includes a first pulse corresponding to a first input period, the first pulse being associated with a first pulse width; and
the first pulse width is larger than a first threshold under one or more conditions;
wherein the drive signal generator is further configured to:
in response to the first pulse width being smaller than a second threshold, even if the first pulse width is still larger than the first threshold, maintain the drive signal at a first logic level without modulation to keep the switch open during at least the first input period.

US Pat. No. 10,342,088

LED LIGHTING SYSTEMS AND METHODS FOR CONSTANT CURRENT CONTROL IN VARIOUS OPERATION MODES

On-Bright Electronics (Sh...

1. A system for providing at least an output current to one or more light emitting diodes, the system comprising:a first sampling-and-holding and voltage-to-current-conversion component configured to receive at least a sensed signal and generate a first current signal, the sensed signal being associated with an inductor current flowing through an inductor coupled to a first switch;
a second sampling-and-holding and voltage-to-current-conversion component configured to receive at least the sensed signal and generate a second current signal;
a signal-amplification and voltage-to-current-conversion component configured to receive at least the sensed signal and generate a third current signal;
a current-signal generator configured to generate a fourth current signal;
a capacitor coupled to the current-signal generator, coupled through a second switch to the first sampling-and-holding and voltage-to-current-conversion component and the second sampling-and-holding and voltage-to-current-conversion component, and coupled through a third switch to the signal-amplification and voltage-to-current-conversion component, the capacitor being configured to generate a voltage signal;
a comparator configured to process information associated with the voltage signal and the sensed signal and generate a comparison signal based on at least information associated with the voltage signal and the sensed signal;
a modulation-signal generator configured to receive at least the comparison signal and generate a modulation signal; and
a gate driver configured to receive the modulation signal and output a drive signal to the first switch;
wherein:
the drive signal is associated with at least one or more switching periods, each of the one or more switching periods including at least an on-time period for the first switch and a demagnetization period for a demagnetization process;
the first current signal represents the inductor current at a beginning of the on-time period;
the second current signal represents the inductor current at an end of the on-time period; and
the third current signal represents the inductor current;
wherein for each of the one or more switching periods,
the first current signal and the second current signal are configured to discharge or charge the capacitor during only the demagnetization period;
the third current signal is configured to discharge or charge the capacitor during only the on-time period; and
the fourth current signal is configured to charge or discharge the capacitor during the switching period.

US Pat. No. 10,306,721

SYSTEMS AND METHODS FOR INTELLIGENT DIMMING CONTROL USING TRIAC DIMMERS

On-Bright Electronics (Sh...

1. An apparatus for a power converter, the apparatus comprising:a drive signal generator configured to receive an input signal associated with a TRIAC dimmer and output a drive signal to a switch to affect a current that flows through a winding of a power converter;
wherein:
the input signal includes a first pulse corresponding to a first input period, the first pulse being associated with a first pulse width; and
the first pulse width is larger than a first threshold under one or more conditions;
wherein the drive signal generator is further configured to:
in response to the first pulse width being smaller than a second threshold, even if the first pulse width is still larger than the first threshold, maintain the drive signal at a first logic level without modulation to keep the switch open during at least the first input period.

US Pat. No. 10,277,110

SYSTEM AND METHOD PROVIDING OVER CURRENT PROTECTION BASED ON DUTY CYCLE INFORMATION FOR POWER CONVERTER

On-Bright Electronics (Sh...

1. A system controller for protecting a power converter, the system controller comprising:a signal generator configured to generate a threshold signal;
a comparator configured to receive the threshold signal and a current sensing signal and generate a comparison signal based on at least information associated with the threshold signal and the current sensing signal, the current sensing signal indicating a magnitude of a primary current flowing through a primary winding of a power converter; and
a modulation and drive component coupled to the signal generator and configured to receive at least the comparison signal, generate a drive signal based on at least information associated with the comparison signal, and output the drive signal to a switch in order to affect the primary current, the drive signal being associated with one or more first switching periods and a second switching period following the one or more first switching periods, the one or more first switching periods corresponding to one or more first duty cycles, the second switching period including an on-time period and an off-time period;
wherein the signal generator is further configured to, for the second switching period,
determine a first threshold signal value based on at least information associated with the one or more first duty cycles;
set a time to zero at a beginning of the on-time period;
if the time satisfies one or more first predetermined conditions, generate the threshold signal equal to the determined first threshold signal value so that the threshold signal is constant in magnitude as a function of the time; and
if the time satisfies one or more second predetermined conditions, generate the threshold signal so that the threshold signal decreases with the increasing time in magnitude.

US Pat. No. 10,271,396

SYSTEMS AND METHODS FOR INTELLIGENT DIMMING CONTROL USING TRIAC DIMMERS

On-Bright Electronics (Sh...

1. An apparatus for a power converter, the apparatus comprising:a drive signal generator configured to receive an input signal associated with a TRIAC dimmer and output a drive signal to a switch to affect a current that flows through a winding of a power converter;
wherein:
the input signal includes a first pulse corresponding to an input period, the first pulse being associated with a first pulse width; and
the first pulse width is larger than a first threshold under one or more conditions;
wherein the drive signal generator is further configured to:
in response to the first pulse width being smaller than a second threshold, even if the first pulse width is still larger than the first threshold, maintain the drive signal at a logic level without modulation to keep the switch open during at least the input period.

US Pat. No. 10,264,644

SYSTEMS AND METHODS FOR TEMPERATURE CONTROL IN LIGHT-EMITTING-DIODE LIGHTING SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating one or more currents, the system controller comprising:a thermal detector configured to detect a temperature associated with the system controller and generate a thermal detection signal based at least in part on the detected temperature; and
a modulation-and-driver component configured to receive the thermal detection signal and generate a drive signal based at least in part on the thermal detection signal to close or open a switch to affect a drive current associated with one or more light emitting diodes;
wherein the modulation-and-driver component is further configured to:
in response to the detected temperature increasing from a first temperature threshold but remaining smaller than a second temperature threshold, generate the drive signal to keep the drive current at a first current magnitude, the second temperature threshold being higher than the first temperature threshold;
in response to the detected temperature increasing to become equal to or larger than the second temperature threshold, change the drive signal to reduce the drive current from the first current magnitude to a second current magnitude, the second current magnitude being smaller than the first current magnitude;
in response to the detected temperature decreasing from the second temperature threshold but remaining larger than the first temperature threshold, generate the drive signal to keep the drive current at the second current magnitude; and
in response to the detected temperature decreasing to become equal to or smaller than the first temperature threshold, change the drive signal to increase the drive current from the second current magnitude to the first current magnitude.

US Pat. No. 10,250,123

SYSTEM AND METHOD PROVIDING OVER CURRENT PROTECTION BASED ON DUTY CYCLE INFORMATION FOR POWER CONVERTER

On-Bright Electronics (Sh...

1. A system controller for protecting a power converter, the system controller comprising:a signal generator configured to generate a threshold signal;
a comparator configured to receive the threshold signal and a current sensing signal and generate a comparison signal based on at least information associated with the threshold signal and the current sensing signal, the current sensing signal indicating a magnitude of a primary current flowing through a primary winding of a power converter; and
a modulation and drive component coupled to the signal generator and configured to receive at least the comparison signal, generate a drive signal based on at least information associated with the comparison signal, and output the drive signal to a switch in order to affect the primary current, the drive signal being associated with one or more first switching periods and a second switching period following the one or more first switching periods, the one or more first switching periods corresponding to one or more first duty cycles, the second switching period including an on-time period and an off-time period;
wherein the signal generator is further configured to, for the second switching period,
determine a first threshold signal value based on at least information associated with the one or more first duty cycles;
set a time to zero at a beginning of the on-time period;
if the time satisfies one or more first predetermined conditions, generate the threshold signal equal to the determined first threshold signal value so that the threshold signal is constant in magnitude as a function of the time; and
if the time satisfies one or more second predetermined conditions, generate the threshold signal so that the threshold signal decreases with the increasing time in magnitude.

US Pat. No. 10,236,778

SYSTEMS AND METHODS FOR PROTECTING POWER CONVERSION SYSTEMS UNDER OPEN AND/OR SHORT CIRCUIT CONDITIONS

On-Bright Electronics (Sh...

1. A system for protecting a power converter, the system comprising:a first comparator configured to receive a first input signal and a second input signal and generate a first comparison signal based on at least information associated with the first input signal and the second input signal, the first input signal being associated with at least a primary current flowing through a primary winding of the power converter, the power converter further including a switch configured to affect the primary current; and
a detection component configured to receive the first comparison signal and generate an off-time signal based on at least information associated with the first comparison signal;
wherein the detection component is configured:
if the first comparison signal indicates that the first input signal is smaller than the second input signal in magnitude for a first predetermined period of time, to generate the off-time signal to turn off the switch; and
if the first comparison signal does not indicate that the first input signal is smaller than the second input signal in magnitude for the first predetermined period of time, not to generate the off-time signal to turn off the switch.

US Pat. No. 10,230,304

SYSTEMS AND METHODS FOR REDUCING ELECTROMAGNETIC INTERFERENCE BY ADJUSTING SWITCHING PROCESSES

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:a signal generator configured to receive a feedback signal associated with an output signal of the power conversion system and a current sensing signal associated with a primary current flowing through a primary winding of the power conversion system and generate a modulation signal based on at least information associated with the feedback signal and the current sensing signal; and
a driving component configured to receive the modulation signal and output a drive signal to a switch based on at least information associated with the modulation signal;
wherein the driving component is further configured to, if the modulation signal changes from a first logic level to a second logic level, change the drive signal in magnitude from a first magnitude value to a second magnitude value during a first time period in order to close the switch, the first time period being larger than zero.

US Pat. No. 10,320,300

SYSTEMS AND METHODS FOR REDUCING SWITCHING LOSS IN POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A power converter, the power converter comprising:a primary winding;
a secondary winding coupled to the primary winding;
a first switch including a first switch terminal, a second switch terminal, and a third switch terminal, the first switch being configured to affect a first current associated with the primary winding, the first switch terminal corresponding to a first voltage, the second switch terminal corresponding to a second voltage, the first voltage minus the second voltage being equal to a voltage difference;
a second switch including a fourth switch terminal, a fifth switch terminal, and a sixth switch terminal and configured to affect a second current associated with the secondary winding;
a sampled-voltage generator configured to sample a third voltage before the first switch becomes closed and generate a sampled voltage based at least in part on the third voltage, the third voltage being proportional to the voltage difference if the first switch is not closed;
an error amplifier configured to receive the sampled voltage and a reference voltage and generate an amplified voltage based at least in part on the sampled voltage and the reference voltage;
a threshold voltage generator configured to generate a threshold voltage based on at least information associated with the amplified voltage; and
a drive signal generator configured to receive the threshold voltage and a fourth voltage, generate a drive signal based at least in part on the threshold voltage and the fourth voltage, and output the drive signal to the second switch, the fourth voltage representing the second current;
wherein the drive signal generator is further configured to, in response to the fourth voltage becoming larger than the threshold voltage, generate the drive signal to open the second switch;
wherein the power converter is configured to, in response to the sampled voltage and the reference voltage not being equal, change the threshold voltage with time.

US Pat. No. 10,305,386

SYSTEMS AND METHODS FOR TWO-LEVEL PROTECTION OF POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:a modulation component configured to receive a feedback voltage associated with an output voltage of a power conversion system, and generate a modulation signal based on at least information associated with the feedback voltage, the modulation signal being associated with a modulation frequency; and
a driving component configured to generate a drive signal based on at least information associated with the modulation signal and output the drive signal to a switch associated with a primary current flowing through a primary winding of the power conversion system, the drive signal being associated with the modulation frequency;
wherein the modulation component is further configured to:
increase the modulation frequency from a first frequency magnitude to a second frequency magnitude in response to the feedback voltage increasing from a first feedback magnitude to a second feedback magnitude;
keep the modulation frequency at the second frequency magnitude if the feedback voltage is larger than the second feedback magnitude and smaller than a third feedback magnitude;
increase the modulation frequency from the second frequency magnitude to a third frequency magnitude in response to the feedback voltage increasing from the third feedback magnitude to a fourth feedback magnitude; and
in response to determining that a first level protection or a second level protection is triggered, generate a protection signal to cause the switch to open and remain open to protect the power conversion system;
wherein:
the second frequency magnitude corresponds to the first level protection; and
the third frequency magnitude corresponds to the second level protection.

US Pat. No. 10,256,734

SYSTEMS AND METHODS FOR SOURCE SWITCHING AND VOLTAGE GENERATION

On-Bright Electronics (Sh...

1. A system controller for regulating a power converter, the system controller comprising:a first controller terminal associated with a first controller voltage and coupled to a first transistor terminal of a first transistor, the first transistor further including a second transistor terminal and a third transistor terminal, the second transistor terminal being coupled to a primary winding of a power converter;
a second controller terminal associated with a second controller voltage and coupled to the third transistor terminal;
a third controller terminal associated with a third controller voltage and coupled to a first capacitor terminal of a capacitor, the capacitor including a second capacitor terminal;
a first switch configured to receive a first signal and including a first switch terminal and a second switch transistor terminal, the first switch terminal being coupled to the second controller terminal; and
a second switch configured to receive a second signal and including a third switch terminal and a fourth switch terminal, the third switch terminal being coupled to the first switch terminal, the fourth switch terminal being coupled to the third controller terminal;
wherein the third controller terminal is configured to, in response to the second signal satisfying one or more conditions, charge the capacitor with a current flowing from the third transistor terminal to the first capacitor terminal through the second controller terminal, the second switch, and the third controller terminal.

US Pat. No. 10,291,131

SYSTEMS AND METHODS FOR PEAK CURRENT ADJUSTMENTS IN POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system for regulating a power converter, the system comprising:a modulation and drive signal generator configured to:
generate a drive signal based at least in part on a signal selected from a group consisting of a first signal and a second signal, the first signal indicating a magnitude of an input voltage, the second signal indicating a magnitude of a current flowing through a primary winding of a power converter; and
output the drive signal to a switch to affect the current;
wherein the modulation and drive signal generator is further configured to, in response to an output voltage of the power converter being regulated in a constant-voltage mode,
in response to an output current of the power converter falling within a first predetermined range, generate, without taking into account the magnitude of the current flowing through the primary winding, a modulation signal based at least in part on the magnitude of the input voltage, the modulation signal being the drive signal; and
in response to the output current falling within a second predetermined range, generate, without taking into account the magnitude of the input voltage, the modulation signal based at least in part on the magnitude of the current, the modulation signal being the drive signal.

US Pat. No. 10,291,135

SYSTEMS AND METHODS FOR REGULATING POWER CONVERSION SYSTEMS OPERATING IN QUASI-RESONANT MODE

On-Bright Electronics (Sh...

1. A system controller for a power converter, the system controller comprising:a first signal generator configured to receive a first signal associated with an auxiliary winding of a power converter and output a drive signal to a switch to affect a current flowing through a primary winding of the power converter;
wherein the first signal generator is further configured to:
detect a plurality of valleys of the first signal, the plurality of valleys corresponding to a same demagnetization process of the power converter;
select a valley from the plurality of valleys;
change a second signal at a time corresponding to the selected valley; and
change the drive signal based at least in part on the selected valley in order to close the switch.

US Pat. No. 10,292,217

SYSTEMS AND METHODS FOR DIMMING CONTROL USING SYSTEM CONTROLLERS

On-Bright Electronics (Sh...

1. A system for dimming control, the system comprising:a system controller;
wherein the system controller includes:
a first controller terminal; and
a second controller terminal;
wherein:
a second transistor terminal of a transistor is coupled to a first resistor terminal of a first resistor, the transistor further including a first transistor terminal and a third transistor terminal, the first resistor further including a second resistor terminal; and
the second resistor terminal is coupled to the third transistor terminal;
wherein:
the system controller is configured to receive an input signal at the first controller terminal and to generate an output signal at the second controller terminal based at least in part on the input signal; and
the system controller is further configured to, in response to the input signal becoming larger in magnitude than a threshold signal, change the output signal after a delay in order to change the transistor from a first condition to a second condition;
wherein the transistor is configured to receive the output signal at the first transistor terminal and to change between the first condition and the second condition based at least in part on the output signal.

US Pat. No. 10,285,228

SYSTEMS AND METHODS FOR CURRENT REGULATION IN LIGHT-EMITTING-DIODE LIGHTING SYSTEMS

On-Bright Electronics (Sh...

1. A system controller comprising:a first controller terminal configured to receive an input voltage, the first controller terminal being further configured to allow a first current flowing into the system controller based at least in part on the input voltage in response to one or more switches being closed;
a second controller terminal configured to allow the first current to flow out of the system controller through the second controller terminal in response to the one or more switches being closed, the second controller terminal being further configured to receive a current sensing signal based at least in part on the first current;
a third controller terminal configured to be biased at a first voltage;
a fourth controller terminal coupled to the third controller terminal through a first capacitor, the first capacitor not being any part of the system controller;
an error amplifier configured to generate a compensation signal based at least in part on the current sensing signal, the error amplifier including a second capacitor; and
a driver configured to generate a drive signal based at least in part on the compensation signal and output the drive signal to affect the first current flowing from the first controller terminal to the second controller terminal;
wherein the error amplifier further includes a first input terminal, a second input terminal, and an output terminal;
wherein:
the first input terminal is coupled directly or indirectly with the second controller terminal;
the second input terminal is configured to receive a second voltage;
the output terminal is coupled to the second capacitor not through any controller terminal; and
the fourth controller terminal is coupled to a clamping component.

US Pat. No. 10,277,132

SYSTEMS AND METHODS FOR CONSTANT VOLTAGE MODE AND CONSTANT CURRENT MODE IN FLYBACK POWER CONVERTERS WITH PRIMARY-SIDE SENSING AND REGULATION

On-Bright Electronics (Sh...

1. A system for regulating a power converter, the system comprising:a ramping signal generator configured to receive a demagnetization signal and generate a ramping signal;
a first comparator configured to receive the ramping signal and a first threshold signal and generate a first comparison signal based at least in part on the ramping signal and the first threshold signal;
a second comparator configured to receive a sensed signal and a second threshold signal and generate a second comparison signal, the sensed signal being associated with a current flowing through a primary winding of the power converter;
a drive signal generator configured to receive at least the first comparison signal and the second comparison signal and output a drive signal to a switch, the switch being configured to affect the current flowing through the primary winding;
wherein:
the demagnetization signal is associated with a demagnetization duration;
the drive signal is associated with a switching period; and
the system is further configured to keep a ratio of the demagnetization duration to the switching period constant.

US Pat. No. 10,270,334

SYSTEMS AND METHODS FOR OUTPUT CURRENT REGULATION IN POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:a first controller terminal configured to provide a compensation signal based on at least information associated with a first current flowing through an inductive winding of a power converter;
a ramp-current generator configured to receive a modulation signal, the compensation signal and a first reference signal and generate a ramp current based at least in part on the modulation signal, the compensation signal and the first reference signal;
a ramp-signal generator configured to receive the ramp current and generate a ramping signal based at least in part on the ramp current;
a modulation component configured to receive the ramping signal and the compensation signal and generate the modulation signal based at least in part on the ramping signal and the compensation signal; and
a driver configured to generate a drive signal based on at least information associated with the modulation signal and output the drive signal to a switch to affect the first current, the drive signal being associated with a switching period including an on-time period and an off-time period;
wherein:
the switch is closed in response to the drive signal during the on-time period;
the switch is opened in response to the drive signal during the off-time period;
a duty cycle is equal to a duration of the on-time period divided by a duration of the switching period; and
one minus the duty cycle is equal to a parameter;
wherein the ramp-current generator is further configured to generate the ramp current approximately proportional in magnitude to a multiplication product of the duty cycle, the parameter and a difference, the difference representing the first reference signal minus the compensation signal in magnitude.

US Pat. No. 10,270,350

SYSTEMS AND METHODS FOR VOLTAGE CONTROL AND CURRENT CONTROL OF POWER CONVERSION SYSTEMS WITH MULTIPLE OPERATION MODES

On-Bright Electronics (Sh...

1. A system controller for regulating a power conversion system, the system controller comprising:an operation-mode-selection component configured to receive a first signal related to an output load of the power conversion system and a second signal related to an input signal received by the power conversion system and output a mode-selection signal based on at least information associated with the first signal and the second signal; and
a driving component configured to receive the mode-selection signal and generate a drive signal based on at least information associated with the mode-selection signal, the drive signal corresponding to a switching frequency;
wherein the operation-mode-selection component is further configured to:
determine whether the output load is larger than a first load threshold in magnitude and the input signal is larger than an input threshold;
determine whether the switching frequency is smaller than a first frequency threshold and larger than a second frequency threshold;
if the output load is determined to be larger than the first load threshold in magnitude and the input signal is determined to be larger than the input threshold, generate the mode-selection signal corresponding to a quasi-resonant mode if the switching frequency is determined to be smaller than the first frequency threshold and larger than the second frequency threshold;
determine whether the output load is larger than the first load threshold in magnitude and the input signal is smaller than the input threshold;
determine whether the switching frequency is equal to the second frequency threshold; and
if the output load is determined to be larger than the first load threshold in magnitude and the input signal is determined to be smaller than the input threshold, generate the mode-selection signal corresponding to a continuous conduction mode if the switching frequency is determined to be equal to the second frequency threshold.

US Pat. No. 10,243,448

SYSTEM AND METHOD PROVIDING OVER CURRENT PROTECTION BASED ON DUTY CYCLE INFORMATION FOR POWER CONVERTER

On-Bright Electronics (Sh...

1. A signal generator for protecting a power converter, the signal generator comprising:a modulation and drive component configured to generate a modulation signal to output a drive signal to a switch in order to affect a primary current flowing through a primary winding of a power converter, the modulation signal including an on-time period, the switch being closed during the on-time period;
a ramping-signal generator configured to receive the modulation signal and generate a ramping signal based on at least information associated with the modulation signal;
a sampling-signal generator configured to receive the modulation signal and generate a sampling signal including a pulse in response to a falling edge of the modulation signal; and
a sample-and-hold component configured to receive the sampling signal and the ramping signal and output a sampled-and-held signal associated with a magnitude of the ramping signal corresponding to the pulse of the sampling signal;
wherein:
the falling edge of the modulation signal is at a first time;
the pulse of the sampling signal starts at a second time and ends at a third time;
the first time and the second time are the same; and
the on-time period ends at the first time.

US Pat. No. 10,243,459

SYSTEMS AND METHODS OF OVERVOLTAGE PROTECTION FOR LED LIGHTING

On-Bright Electronics (Sh...

1. A system controller for a power converter, the system controller comprising:a modulation signal generator configured to generate a modulation signal;
a first voltage signal generator configured to receive a first voltage signal, the modulation signal, and a demagnetization signal, and to generate a second voltage signal based at least in part on the first voltage signal, the modulation signal, and the demagnetization signal; and
a comparison signal generator configured to receive a first threshold signal, generate a comparison signal based at least in part on a third voltage signal and the first threshold signal, and output the comparison signal to the modulation signal generator, the third voltage signal being associated with the second voltage signal;
wherein:
the modulation signal indicates an on-time period;
the demagnetization signal indicates a demagnetization period; and
the second voltage signal is approximately equal to the first voltage signal multiplied by a ratio of the on-time period to a sum of the on-time period and the demagnetization period in magnitude.

US Pat. No. 10,340,795

SYSTEMS AND METHODS FOR OUTPUT CURRENT REGULATION IN POWER CONVERSION SYSTEMS

On-Bright Electronics (Sh...

1. A system controller for regulating a power converter, the system controller comprising:a driver configured to output a drive signal to a switch to affect a current flowing through an inductive winding of a power converter, the drive signal being associated with a switching period including an on-time period and an off-time period;
wherein:
the switch is closed in response to the drive signal during the on-time period;
the switch is opened in response to the drive signal during the off-time period;
a duty cycle is equal to a duration of the on-time period divided by a duration of the switching period; and
one minus the duty cycle is equal to a parameter;
wherein the system controller is configured to keep a multiplication product of the duty cycle, the parameter and the duration of the on-time period approximately constant.

US Pat. No. 10,375,785

SYSTEMS AND METHODS FOR STAGE-BASED CONTROL RELATED TO TRIAC DIMMERS

On-Bright Electronics (Sh...

1. A system controller for a lighting system, the system controller comprising:a first controller terminal configured to receive a first signal, the first signal being related to a dimming-control phase angle;
a second controller terminal coupled to a first transistor terminal of a transistor, the transistor further including a second transistor terminal and a third transistor terminal, the second transistor terminal being coupled to a winding;
a third controller terminal coupled to the third transistor terminal of the transistor; and
a fourth controller terminal coupled to a resistor and configured to receive a second signal, the second signal representing a magnitude of a current flowing through at least the winding, the third controller terminal, the fourth controller terminal, and the resistor;
wherein the system controller is configured to, in response to the first signal satisfying one or more predetermined conditions:
cause the second signal to ramp up and down during a first duration of time, the first duration of time starting at a first time and ending at a second time, the second time being the same as or later than the first time; and
cause the second signal to ramp up and down during a second duration of time, the second duration of time starting at a third time and ending at a fourth time, the fourth time being the same as or later than the third time;
wherein the system controller is further configured to:
in response to the dimming-control phase angle increasing from a first angle magnitude to a second angle magnitude, keep the first duration of time at a first predetermined constant;
in response to the dimming-control phase angle increasing from the second angle magnitude to a third angle magnitude, increase the first duration of time; and
in response to the dimming-control phase angle increasing from the third angle magnitude to a fourth angle magnitude, keep the first duration of time at a second predetermined constant.

US Pat. No. 10,375,787

LED LIGHTING SYSTEMS AND METHODS FOR CONSTANT CURRENT CONTROL IN VARIOUS OPERATION MODES

On-Bright Electronics (Sh...

1. A system for providing at least an output current to one or more light emitting diodes, the system comprising:a first sampling-and-holding and voltage-to-current-conversion component configured to receive at least a sensed signal and generate a first current signal, the sensed signal being associated with an inductor current flowing through an inductor coupled to a first switch;
a second sampling-and-holding and voltage-to-current-conversion component configured to receive at least the sensed signal and generate a second current signal;
a signal-amplification and voltage-to-current-conversion component configured to receive at least the sensed signal and generate a third current signal;
a current-signal generator configured to generate a fourth current signal;
a capacitor coupled to the current-signal generator, coupled through a second switch to the first sampling-and-holding and voltage-to-current-conversion component and the second sampling-and-holding and voltage-to-current-conversion component, and coupled through a third switch to the signal-amplification and voltage-to-current-conversion component, the capacitor being configured to generate a voltage signal;
a comparator configured to process information associated with the voltage signal and the sensed signal and generate a comparison signal based on at least information associated with the voltage signal and the sensed signal;
a modulation-signal generator configured to receive at least the comparison signal and generate a modulation signal; and
a gate driver configured to receive the modulation signal and output a drive signal to the first switch;
wherein:
the drive signal is associated with at least one or more switching periods, each of the one or more switching periods including at least an on-time period for the first switch and a demagnetization period for a demagnetization process;
the first current signal represents the inductor current at a beginning of the on-time period;
the second current signal represents the inductor current at an end of the on-time period; and
the third current signal represents the inductor current;
wherein for each of the one or more switching periods,
the first current signal and the second current signal are configured to discharge or charge the capacitor during only the demagnetization period;
the third current signal is configured to discharge or charge the capacitor during only the on-time period; and
the fourth current signal is configured to charge or discharge the capacitor during the switching period.