发明名称 |
CURRENT DIRECTION DETECTION CIRCUIT AND SWITCHING REGULATOR HAVING THE SAME |
摘要 |
A current direction detection circuit includes a monitoring transistor having a control terminal and an output terminal respectively connected with a control terminal and an output terminal of a ground side output transistor; an impedance element having one terminal connected with an input terminal of the monitoring transistor and the other terminal grounded; first and second constant-current sources; a diode-connected reference transistor interposed between the first constant-current source and ground potential; and a sensing transistor interposed between the second constant-current source and the impedance element and having a control terminal connected with the control terminal of the reference transistor. The current direction detection circuit is small yet capable of minimizing power loss of a switching regulator.
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申请公布号 |
US2009001951(A1) |
申请公布日期 |
2009.01.01 |
申请号 |
US20080202707 |
申请日期 |
2008.09.02 |
申请人 |
ROHM CO., LTD. |
发明人 |
HOJO YOSHIYUKI |
分类号 |
G05F1/569;G05F1/40;H02M3/137;H02M3/155;H02M3/156;H02M3/158;H02M7/48 |
主分类号 |
G05F1/569 |
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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