Controller for a power factor corrector and method of regulating the power factor corrector
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United States of America Patent
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Mar 14, 2006
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N/A
app pub date -
Aug 1, 2003
filing date -
Aug 1, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A controller for use with a current-controlled frequency-modulated power factor corrector having a power switch therein, and a method of regulating the same. In one embodiment, the controller includes a sensing circuit configured to detect a sense current that is representative of an input current to the power factor corrector. The controller also includes a frequency modulation circuit, coupled to the sensing circuit, configured to provide a signal that causes at least one of: (a) an increase of a switching frequency of the power switch when the input current increases, and (b) a decrease of the switching frequency of the power switch when the input current decreases.
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