发明公开
- 专利标题: Backdrive protection circuit
- 专利标题(中): 针对反向电流保护电路
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申请号: EP12159384.2申请日: 2012-03-14
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公开(公告)号: EP2503690A3公开(公告)日: 2014-02-26
- 发明人: Koellmann, Andreas
- 申请人: NXP B.V.
- 申请人地址: High Tech Campus 60 5656 AG Eindhoven NL
- 专利权人: NXP B.V.
- 当前专利权人: NXP B.V.
- 当前专利权人地址: High Tech Campus 60 5656 AG Eindhoven NL
- 代理机构: Hardingham, Christopher Mark
- 优先权: US201113052271 20110321
- 主分类号: H03K17/082
- IPC分类号: H03K17/082 ; H03K17/16 ; H03K17/30 ; H03K19/003
摘要:
Methods, devices and circuits are provided for protection from backdrive current. One such device is subject to back voltage from an output node (output) of the device and includes circuitry (104,106) that is configured to compare the supply voltage node (VDD_IN) and the output node (output). In response to the comparison, the circuitry generates an output signal. Level shifted versions of the output signal are used to provide an output voltage corresponding to the higher of a supply voltage node and an output node. Switches (108,110) are used to place the device (112) in different modes in response to the output signal.
公开/授权文献
- EP2503690B1 Backdrive protection circuit 公开/授权日:2018-10-17
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