US Patent No. 10,397,991

LOAD CONTROL DEVICE FOR A LIGHT-EMITTING DIODE LIGHT SOURCE


Patent No. 10,397,991
Issue Date August 27, 2019
Title Load Control Device For A Light-emitting Diode Light Source
Inventorship Robert C. Newman, Jr., Emmaus, PA (US)
Stuart W. DeJonge, Riegelsville, PA (US)
Assignee Lutron Technology Company LLC, Coopersburg, PA (US)

Claim of US Patent No. 10,397,991

1. A load control device for controlling power delivered from a power source to an electrical load, the load control device configured to receive an input voltage from the power source, the load control device comprising:a power converter configured to generate a bus voltage;
a load regulation circuit configured to receive the bus voltage and to control the power delivered to the electrical load;
a rectifier circuit configured to receive the input voltage from the power source, the rectifier circuit configured to rectify the input voltage to generate a rectified voltage and provide the rectified voltage to the power converter when the input voltage is an AC voltage, the rectifier circuit further configured to pass through the input voltage to the power converter when the input voltage is a DC voltage, the rectifier comprising first and second input terminals, first and second output terminals, a first controllable switching circuit, and a second controllable switching circuit, the first and second switching circuits rendered non-conductive when the input voltage is an AC voltage and rendered conductive when the input voltage is a DC voltage; and
a control circuit configured to control the load regulation circuit to control the power delivered to the electrical load, the control circuit configured to operate in an AC mode when the input voltage is an AC voltage and in a DC mode when the input voltage is a DC voltage;
wherein the control circuit is configured to disable the power converter when operating in the DC mode.