发明授权
- 专利标题： Synchronous rectification switching regulator, control circuit thereof, and method of controlling the operation thereof
- 专利标题（中）： 同步整流开关调节器，其控制电路及其工作控制方法
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申请号： US11794702申请日： 2006-11-09
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公开(公告)号： US07990121B2公开(公告)日： 2011-08-02
- 发明人: Shinichi Kojima , Tohru Ueno
- 申请人： Shinichi Kojima , Tohru Ueno
- 申请人地址： JP Tokyo
- 专利权人： Ricoh Company, Ltd.
- 当前专利权人： Ricoh Company, Ltd.
- 当前专利权人地址： JP Tokyo
- 代理机构： Cooper & Dunham LLP
- 优先权： JP2005-340626 20051125; JP2006-196772 20060719
- 国际申请： PCT/JP2006/322799 WO 20061109
- 国际公布： WO2007/060871 WO 20070531
- 主分类号： G05F1/40
- IPC分类号： G05F1/40 ; G05F1/56
摘要：
A synchronous-rectification-type switching regulator is disclosed that includes a first switching element; an inductor charged with a voltage input to an input terminal of the switching regulator by the switching of the first switching element; a second switching element for synchronous rectification performing switching so as to discharge the inductor; a control circuit part controlling the switching of the first switching element so that an output voltage from an output terminal of the switching regulator is a predetermined constant voltage, and to cause the second switching element to perform the switching inversely to the first switching element; and a reverse current prevention circuit part interrupting a current that flows into the second switching element by cutting off the connection of the second switching element so as to prevent generation of a reverse current that flows in the direction of the second switching element from the output terminal.
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