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.

公开(公告)号：US20160218634A1

公开(公告)日：2016-07-28

申请号：US14916086

申请日：2014-05-07

Applicant: ZTE CORPORATION

Inventor： Fengfu DU ,  Jie FAN ,  Yaoguang GAO

IPC: H02M3/335

CPC classification number: H02M3/33546 ,  H02M3/33592 ,  H02M7/217 ,  Y02B70/1475

Abstract: Provided is apparatus and a method for driving synchronous rectifiers, which relate to the field of power supplies for communications. The apparatus includes: detection circuits, wherein each of the detection circuits is configured to detect drain and source voltages of one of synchronous rectifiers to obtain a detection signal for indicating a current direction in the one of the synchronous rectifiers; an isolated driving circuit, configured to generate isolated driving signals for driving the synchronous rectifiers according to the detection signals output by the detection circuits; and the synchronous rectifiers, configured to synchronously rectify input signals from a main transformer by using the isolated driving signals. The present disclosure can obtain the isolated driving signals of the synchronous rectifiers simply and effectively, and has a superior protective feature in case of shoot-through and other abnormalities.

Abstract translation: 提供了用于驱动同步整流器的装置和方法，其涉及通信用电源领域。 该装置包括：检测电路，其中每个检测电路被配置为检测同步整流器之一的漏极和源极电压，以获得用于指示所述同步整流器中的一个同步整流器中的电流方向的检测信号; 隔离驱动电路，被配置为根据由检测电路输出的检测信号产生用于驱动同步整流器的隔离驱动信号; 和同步整流器，被配置为通过使用隔离的驱动信号来同步整流来自主变压器的输入信号。 本公开可以简单有效地获得同步整流器的隔离驱动信号，并且在穿透等异常情况下具有优异的保护特性。