发明授权
- 专利标题： Circuit for determining the end of a demagnetization stroke of a switched mode power supply
- 专利标题（中）： 用于确定开关模式电源的退磁行程结束的电路
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申请号： US13571028申请日： 2012-08-09
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公开(公告)号： US09065344B2公开(公告)日： 2015-06-23
- 发明人: Michel Germe , Emeric Uguen
- 申请人： Michel Germe , Emeric Uguen
- 申请人地址： NL Eindhoven
- 专利权人： NXP B.V.
- 当前专利权人： NXP B.V.
- 当前专利权人地址： NL Eindhoven
- 优先权： EP11290369 20110811
- 主分类号： H02M3/335
- IPC分类号： H02M3/335 ; H02M1/40
摘要：
A circuit for a switched mode power supply having a winding. The circuit comprising: an input configured to receive a winding voltage derived from the winding; a differentiation element configured to differentiate the winding voltage with respect to time in order to determine a derivative signal and compare the derivative signal with a threshold value; a steady state detector configured to set a zero derivative signal when the derivative signal has not exceeded the threshold value for a predetermined period of time, and a logic arrangement configured to identify an end of a demagnetization stroke of the switched mode power supply when the derivative signal crosses a final threshold value after the zero derivative signal has been set.
公开/授权文献
- US20130208513A1 Circuit for a Switched Mode Power Supply 公开/授权日：2013-08-15
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