Patent ID: 9621019
Date: 2017-04-11
CPC Classifications: H02M,H05B

Claim:
1. A controller for use in a power conversion system, comprising: a multiplier block coupled to receive an input voltage signal representative of a sensed input voltage of the power conversion system, an input current signal representative of a sensed input current of the power conversion system, and an output voltage signal representative of a sensed output voltage of the power conversion system, wherein the multiplier block is coupled to output a multiplier block output signal responsive to a product of the input voltage signal and the input current signal divided by the output voltage signal; a signal discriminator coupled to output an error signal in response to the multiplier block output signal, wherein the error signal is representative, for one or more periods of the multiplier block output signal, of a difference between a portion of the multiplier block output signal that is greater than a reference signal and a portion of the multiplier block output signal that is less than or equal to the reference signal; and a switch controller coupled to generate a drive signal in response to the error signal to control switching of a power switch of the power conversion system to regulate an average output current of the power conversion system.