Method and device for high-power-factor flyback converter
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United States of America Patent
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Apr 11, 2017
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app pub date -
Mar 18, 2015
filing date -
Mar 18, 2015
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Abstract
The present disclosure is directed to a switching power converter having a power transistor controlled by a controller. The controller includes a multiplier that produces a voltage reference signal. A subtraction circuit subtracts a capacitor signal, which is based on the voltage reference signal, from a sensing signal that is representative of the current flowing through the power transistor. A comparator compares the voltage reference signal to the output of the subtraction circuit, and a driving circuit drives the power transistor based on the comparison resulting in a high power factor and low total harmonic distortion for the converter.
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