发明名称 |
Device in a power delivery circuit |
摘要 |
An improved current sensing circuit is provided in, or for use with, a power delivery circuit having a current controlling device of the type which includes auxiliary current sensing terminals. The current sensing circuit is particularly useful in conjunction with a respective current sensing power MOSFET located in the "high side" of a switching circuit, such as an H-bridge switch for a bidirectional load. The current sensing circuit has two branches connected to the current sensing MOSFET and to a reference potential and constructed to provide an output voltage signal representative of the main current through the current sensing MOSFET. The first branch includes at least two transistors and a resistor serially connected between a current sense terminal of the MOSFET and a reference potential. The second branch also includes at least two serially connected transistors connected between a terminal of the MOSFET and the reference potential. The transistors are cross-connected between branches and provide an inverted current mirror and a current mirror. Fifth and sixth transistors may also be included as part of the current sensing circuit.
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申请公布号 |
US5495155(A) |
申请公布日期 |
1996.02.27 |
申请号 |
US19940344537 |
申请日期 |
1994.11.23 |
申请人 |
UNITED TECHNOLOGIES CORPORATION |
发明人 |
JUZSWIK, DAVID L.;WRENBECK, BRUCE R. |
分类号 |
G01R31/42;H02P7/00;(IPC1-7):H02P1/22;G05F3/16 |
主分类号 |
G01R31/42 |
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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