- 专利标题: Current sensing and control for a transistor power switch
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申请号: US16001518申请日: 2018-06-06
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公开(公告)号: US10361695B2公开(公告)日: 2019-07-23
- 发明人: Ankur Chauhan , Sudheer Prasad , Md. Abidur Rahman , Subrato Roy
- 申请人: TEXAS INSTRUMENTS INCORPORATED
- 申请人地址: US TX Dallas
- 专利权人: Texas Instruments Incorporated
- 当前专利权人: Texas Instruments Incorporated
- 当前专利权人地址: US TX Dallas
- 代理商 Lawrence J. Bassuk; Charles A. Brill; Frank D. Cimino
- 主分类号: H03K3/00
- IPC分类号: H03K3/00 ; H03K17/082 ; G01R19/00 ; H01L23/525 ; H03K17/687
摘要:
An apparatus includes: a first power transistor having a first current conduction path coupled between an input for receiving a supply voltage and a node and a first gate terminal coupled to a first gate control signal; a second power transistor having a second current conduction path coupled between the node and an output terminal for supplying a load current to a load; and a second gate terminal coupled to a second gate control signal; and a current sense transistor having a third gate terminal coupled to the first gate control signal, and outputting a sense current. The apparatus further includes: a differential amplifier having an output signal, and a feedback transistor having a gate terminal coupled to the output signal of the differential amplifier; and a resistor coupled between a monitor node and ground.
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