发明授权
US08218339B2 Power converter having synchronous rectifier and control method of synchronous rectifier
有权
具有同步整流器的电力转换器和同步整流器的控制方法
- 专利标题: Power converter having synchronous rectifier and control method of synchronous rectifier
- 专利标题(中): 具有同步整流器的电力转换器和同步整流器的控制方法
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申请号: US12848436申请日: 2010-08-02
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公开(公告)号: US08218339B2公开(公告)日: 2012-07-10
- 发明人: Han Li , Gang Liu , Jing Chen , Jinfa Zhang
- 申请人: Han Li , Gang Liu , Jing Chen , Jinfa Zhang
- 申请人地址: TW Taoyuan Hsien
- 专利权人: Delta Electronics, Inc.
- 当前专利权人: Delta Electronics, Inc.
- 当前专利权人地址: TW Taoyuan Hsien
- 代理机构: Kirton McConkie
- 代理商 Evan R. Witt
- 优先权: TW98127174A 20090812
- 主分类号: H02M3/335
- IPC分类号: H02M3/335
摘要:
Disclosed is a power converter including a switching circuit; a transformer having a primary winding connected to the switching circuit and a secondary winding; a main control circuit connected to the switching circuit for outputting a main control signal to manipulate the switching circuit; at least one synchronous rectifier connected to the secondary winding; at least one current transformer connected to the synchronous rectifier for outputting a detecting signal according to a current flowing through the synchronous rectifier; and at least one synchronous rectification control circuit connected to a control terminal of the synchronous rectifier, the current transformer, and a control terminal of the switching circuit for receiving the detecting signal and the main control signal for manipulating the synchronous rectifier. In case that the main control circuit manipulates the switching circuit to turn on, the synchronous rectification control circuit manipulates the synchronous rectifier to turn on, and thereby allowing the synchronous rectification control circuit to manipulate the synchronous rectifier to turn off according to the detecting signal.