发明名称 |
METHOD AND APPARATUS FOR MAINTAINING A CONSTANT LOAD CURRENT IN A SWITCH 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 |
WO03063328(A1) |
申请公布日期 |
2003.07.31 |
申请号 |
WO2003US01556 |
申请日期 |
2003.01.17 |
申请人 |
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发明人 |
BALAKRISHNAN, BALU;DJENGUERIAN, ALEX, B.;WONG, KENT;MATTHEWS, DAVID, MICHAEL, HUGH;BIRCAN, ERDEM |
分类号 |
H02M3/28;H02M3/155;H02M3/156;H02M3/335;(IPC1-7):H02M3/335;H02M1/08 |
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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