发明授权
- 专利标题： Inductive load driving apparatus
- 专利标题（中）： 感应负载驱动装置
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申请号： US984008申请日： 1997-12-03
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公开(公告)号： US5936440A公开(公告)日： 1999-08-10
- 发明人: Tadatoshi Asada , Tadashi Uematsu , Wakako Kanazawa
- 申请人： Tadatoshi Asada , Tadashi Uematsu , Wakako Kanazawa
- 申请人地址： JPX Kariya
- 专利权人： Denso Corporation
- 当前专利权人： Denso Corporation
- 当前专利权人地址： JPX Kariya
- 优先权： JPX8-323899 19961204
- 主分类号： H01L27/04
- IPC分类号： H01L27/04 ; H01L21/822 ; H01L21/8234 ; H01L27/088 ; H02J7/24 ; H02P9/30 ; H03K17/00 ; H03K17/0814 ; H03B1/00
摘要：
An inductive load driving apparatus for controlling current supplied from a battery to an inductor such as a generator field coil is composed of a first N-channel MOSFET switching element connected between a high-side terminal of the inductor and a high-side terminal of the battery, a second N-channel MOSFET switching element connected in parallel with the inductive load and a protection circuit having a back-flow current detecting element turning off the second N-channel MOSFET switching element when the inductor does not generate back-flow current. The second N-channel MOSFET switching element is turned on when the first N-channel MOSFET switching element is turned off and turned off when the first switching element is turned on. The first and second N-channel MOSFET switching elements are disposed integrally with each other on a semiconductor chip.
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