Patent ID: 8098506
Filing Date: 2012-01-17
Classification: H02M,H05B,Y02B

Abstract:
1. A power supply controller comprising: a first input to be coupled to receive an input voltage sense signal representative of a dc input voltage of the power supply; a second input to be coupled to receive an output voltage sense signal representative of a dc output voltage of the power supply; a third input to be coupled to receive an input current sense signal representative of an input current of the power supply; a delayed ramp generator coupled to generate a delayed ramp signal; an input charge control signal generator coupled to generate an input charge control signal responsive to an integral of the input current sense signal and a ratio of the input voltage sense signal to the output voltage sense signal; and a drive signal generator coupled to receive the delayed ramp signal and the input charge control signal and to regulate an output of the power supply, wherein the drive signal generator produces a drive signal responsive to the input charge control signal and the delayed ramp signal, the drive signal to be coupled to control a switch of the power supply.