发明授权
- 专利标题: Load drive device
- 专利标题(中): 装载驱动装置
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申请号: US12874423申请日: 2010-09-02
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公开(公告)号: US08488283B2公开(公告)日: 2013-07-16
- 发明人: Motohiro Ando , Akio Sasabe
- 申请人: Motohiro Ando , Akio Sasabe
- 申请人地址: JP Kyoto
- 专利权人: Rohm Co., Ltd.
- 当前专利权人: Rohm Co., Ltd.
- 当前专利权人地址: JP Kyoto
- 代理机构: Fish & Richardson P.C.
- 优先权: JP2009-203592 20090903
- 主分类号: H02H9/02
- IPC分类号: H02H9/02
摘要:
The load drive device of the present invention comprises a load drive unit for switching on/off output current that flows to an inductive load; and an overcurrent protection circuit for detecting whether the output current is in an overcurrent state, wherein the load drive unit has an output transistor connected to one end of the inductive load; and a pre-driver for generating a control signal of the output transistor in accordance with an input signal, and the pre-driver has a first drive unit for switching on/off the output transistor during normal operation; and a second drive unit for switching off the output transistor more slowly than the first drive unit during overcurrent protection operation.
公开/授权文献
- US20110051296A1 LOAD DRIVE DEVICE 公开/授权日:2011-03-03
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