公开(公告)号：US20180091060A1

公开(公告)日：2018-03-29

申请号：US15724062

申请日：2017-10-03

申请人： ON-BRIGHT ELECTRONICS (SHANGHAI) CO., LTD.

发明人： XIAOMIN HUANG ,  YUAN LIN ,  HUAWEI LYU ,  LIEYI FANG

IPC分类号： H02M3/335

CPC分类号： H02M3/33523

摘要： Systems and methods are provided for regulating a power converter. An example system controller includes: a first controller terminal configured to output a drive signal to a switch to affect a current flowing through a primary winding of a power converter, the drive signal being associated with a switching period corresponding to a switching frequency; and a second controller terminal configured to receive a feedback signal associated with an output voltage related to a secondary winding of the power converter. The first controller terminal is further configured to: output the drive signal to close the switch during the on-time period; and output the drive signal to open the switch during the off-time period. The system controller is configured to set the switching frequency to one or more frequency magnitudes, each of the one or more frequency magnitudes being smaller than or equal to an upper frequency limit.