US Patent No. 9,287,707

SYSTEM AND METHOD FOR PROVIDING POWER TO CIRCUITS UNTIL POWER SUPPLY TURNS ON AND SUPPLIES POWER


Patent No. 9,287,707
Issue Date March 15, 2016
Title System And Method For Providing Power To Circuits Until Power Supply Turns On And Supplies Power
Inventorship Rajesh Tiruvuru, Nagalapuram (IN)
Assignee Marvell World Trade LTD., St. Michael (BB)

Claim of US Patent No. 9,287,707

1. A system for a power supply, wherein the power supply is configured to (i) receive an alternating current voltage and (ii)
supply an output voltage, the system comprising:
a switch configured to
receive the alternating current voltage; and
charge, in response to the power supply (i) receiving the alternating current voltage and (ii) not supplying the output voltage,
a capacitance to a first voltage;

wherein the first voltage is output to a first circuit controlling the power supply; and
wherein the first voltage is output to the first circuit while the power supply is (i) receiving the alternating current voltage
and (ii) not supplying the output voltage; and

a control circuit configured to deactivate the switch in response to the power supply (i) receiving the alternating current
voltage and (ii) supplying the output voltage,

wherein, in response to the control circuit deactivating the switch, (i) the switch stops charging the capacitance, and (ii)
the first circuit receives the output voltage of the power supply.