Technique for limiting current through a reactive element in a voltage converter

申请公布号：US2003034760(A1)

申请号：US20020269177

申请日期：2002.10.11

申请公布日期：2003.02.20

申请人：

CHAMPION MICROELECTRONIC CORPORATION

发明人：HWANG JEFFREY H.

分类号：H02M1/00;H02M3/156;H02M3/158;(IPC1-7):G05F1/613

主分类号：H02M1/00

摘要：A current limiting technique for a voltage converter. A current through a reactive element in a voltage converter is limited. Current from a supply is switched through a reactive element in accordance with a switch control signal for forming a regulated output voltage in a feedback loop. A first signal that is representative of the input current is sensed. A voltage that is representative of the output voltage of the voltage converter is sensed. A second signal that is representative of a difference between the output voltage and a desired voltage is formed. A selected one of the first signal and the second signal is compared to a ramp signal for forming the switch control signal wherein the selected one of the first signal and the second signal is selected according to the relative magnitudes of the first and second signal.

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