发明名称 |
Method and apparatus for maintaining an approximate constant current output characteristic in a switched mode power supply |
摘要 |
A regulator circuit maintaining an approximate constant current output characteristic. In one aspect, a disclosed regulator controls a switch that has a current limit threshold. A supply terminal and feedback terminal of the regulator are connected together as a control terminal such that a shunt regulator current is the control terminal current in excess of the internal supply current consumed by the regulator. The current limit threshold of the switch is changed as a function of the shunt regulator current. In another aspect, a control input of the regulator circuit receives a current that is the sum of the internal supply current consumed by the regulator circuit and a feedback current. The feedback current is a fraction of the consumption current of the regulator circuit and the current limit threshold of the switch is changed as a function of the feedback current.
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申请公布号 |
US2003132738(A1) |
申请公布日期 |
2003.07.17 |
申请号 |
US20030346808 |
申请日期 |
2003.01.16 |
申请人 |
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发明人 |
BALAKRISHNAN BALU;DJENGUERIAN ALEX B.;WONG KENT;HUGH MATTHEWS DAVID MICHAEL;BIRCAN ERDEM |
分类号 |
H02M3/28;H02M3/155;H02M3/156;H02M3/335;(IPC1-7):G05F1/40 |
主分类号 |
H02M3/28 |
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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