公开(公告)号：US20180159436A1

公开(公告)日：2018-06-07

申请号：US15578255

申请日：2015-10-26

Applicant: ZTE CORPORATION

Inventor： Qia WANG ,  Jie FAN ,  Hongjin LIU ,  Guoxian LIN ,  Fengfu DU ,  Xiufeng DONG ,  Jianping ZHOU

IPC: H02M3/335 ,  H02M1/088 ,  H02M1/32

CPC classification number: H02M3/33592 ,  H02M1/088 ,  H02M1/32 ,  H02M7/219 ,  H02M2001/0009 ,  H02M2007/2195 ,  Y02B70/1475

Abstract: A synchronous rectifier driving method, a synchronous rectifier circuit and a switching power supply are provided, and the method includes: detecting an output current in a secondary winding of a transformer unit, and generating a first driving signal according to the output current; obtaining a protection signal according to a voltage signal of the secondary winding of the transformer unit in a synchronous rectifier circuit; correcting the first driving signal by using the obtained protection signal to obtain a second driving signal; and driving a rectifier in the synchronous rectifier circuit according to the second driving signal.