Patent ID: 9570986
Date: 2017-02-14
CPC Classifications: H02M,H03K,H05B,Y02B

Claim:
1. A system controller for regulating a power conversion system, the system controller comprising: a jittering-signal generator configured to generate a jittering signal associated with multiple jittering cycles corresponding to a predetermined jittering frequency related to a predetermined jittering period; a ramp-signal generator configured to receive the jittering signal and generate a ramping signal based on at least information associated with the jittering signal, the ramping signal being associated with a ramping slope; a first controller terminal configured to provide a compensation signal based on at least information associated with a first current flowing through a primary winding of a power conversation system; a comparator configured to receive the ramping signal and the compensation signal and output a comparison signal based on at least information associated with the ramping signal and the compensation signal; and a driving component configured to generate a drive signal based on at least information associated with the comparison signal and output the drive signal to a switch to affect the first current, the drive signal being associated with multiple modulation cycles corresponding to a modulation frequency related to a modulation period; wherein the system controller is further configured to: