Patent ID: 9564811
Date: 2017-02-07
CPC Classifications: H02M,H03K,H05B,Y02B

Claim:
1. A system controller for regulating a power conversion system, the system contoller comprising: a first controller terminal configured to receive a first signal associated with an input signal for a primary winding of the power conversation system; a second controller terminal configured to output a drive signal to a switch to affect a first current flowing through the primary winding of the power conversion system, the drive signal being associated with an on-time period, the switch being closed during the on-time period; a first conversion component configured to generate a second current based on at least information associated with the first signal; and a ramp-signal generator configured to generate a ramping signal based on at least information associated with the second current, the ramping signal being associated with a ramping slope; wherein the system controller is configured to adjust a duration of the on-time period based on at least information associated with the first signal; wherein the system controller is further configured to adjust the duration of the on-time period by adjusting the ramping slope of the ramping signal based on at least information associated with the first signal.