发明授权
US08270184B2 Isolated voltage converter with feedback on the primary winding and passive snubber network, and corresponding control method
有权
在初级绕组和无源缓冲网络上具有反馈的隔离电压转换器及相应的控制方法
- 专利标题： Isolated voltage converter with feedback on the primary winding and passive snubber network, and corresponding control method
- 专利标题（中）： 在初级绕组和无源缓冲网络上具有反馈的隔离电压转换器及相应的控制方法
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申请号： US12324412申请日： 2008-11-26
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公开(公告)号： US08270184B2公开(公告)日： 2012-09-18
- 发明人: Michele Grande , Salvatore Tumminaro , Salvatore Giombanco , Alfio Pasqua , Claudio Adragna
- 申请人： Michele Grande , Salvatore Tumminaro , Salvatore Giombanco , Alfio Pasqua , Claudio Adragna
- 申请人地址： IT Agrate Brianza
- 专利权人： STMicroelectronics S.r.l.
- 当前专利权人： STMicroelectronics S.r.l.
- 当前专利权人地址： IT Agrate Brianza
- 代理机构： Graybeal Jackson LLP
- 优先权： ITTO2007A0862 20071129
- 主分类号： H02M3/335
- IPC分类号： H02M3/335
摘要：
An embodiment of a voltage converter, provided with: a voltage transformer having a primary winding receiving an input voltage, a secondary winding supplying an output voltage, and an auxiliary winding supplying a feedback voltage correlated to the output voltage; a main switch, coupled to the primary winding; a control circuit, which controls switching of the main switch and has a sampling stage for sampling and holding the feedback voltage and supplying a sampled signal; and a voltage limiting circuit, provided with a clamp capacitor, designed to be coupled across the primary winding. A sampling control stage is coupled to the sampling stage, and is designed, during a given operating condition of the voltage converter, to enable updating of the sampled signal on the basis of a state of charge of the clamp capacitor.
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