发明名称 |
VOLTAGE CLAMP CIRCUIT, A SWITCHING POWER SUPPLY DEVICE, A SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE, AND A VOLTAGE LEVEL CONVERSION CIRCUIT |
摘要 |
The present invention provides a voltage clamping circuit which is operated in a stable manner with the simple constitution and a switching power source device which enables a high-speed operation. In a switching power source device, one of source/drain routes is connected to an input terminal to which an input voltage is supplied, a predetermined voltage to be restricted is supplied to a gate, and using a MOSFET which provides a current source between another source/drain route and a ground potential of the circuit, a clamp output voltage which corresponds to the input voltage is obtained from another source/drain route. The switching power source device further includes a first switching element which controls a current which is made to flow in an inductor such that the output voltage assumes a predetermined voltage and a second switching element which clamps an reverse electromotive voltage generated in the inductor when the first switching element is turned off to a predetermined potential. In such a switching power source device, the voltage clamping circuit is used in a feedback route for setting a dead time.
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申请公布号 |
US2011127982(A1) |
申请公布日期 |
2011.06.02 |
申请号 |
US201113019833 |
申请日期 |
2011.02.02 |
申请人 |
RENESAS ELECTRONICS CORPORATION |
发明人 |
KUDO RYOTARO;TATENO KOJI |
分类号 |
G05F1/00;H02M7/538;H03K5/08;H03K19/0944 |
主分类号 |
G05F1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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