Patent ID: 9692306
Date: 2017-06-27
CPC Classifications: H02M

Claim:
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.