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Switch control circuit, power factor corrector including the same, and driving method of the power factor corrector
Switch control circuit, power factor corrector including the same, and driving method of the power factor corrector
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机译:开关控制电路,包括该开关控制电路的功率因数校正以及功率因数校正的驱动方法
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摘要
The present invention relates to a switch control circuit, a power factor corrector including the same, and a driving method thereof. According to an exemplary embodiment of the present invention, a turn-on time of a power switch is controlled according to a zero crossing voltage to sense a voltage of both terminals of the power switch, and a turn-off time of the power switch is controlled according to a feedback voltage corresponding to the output voltage. At this time, the switching frequency of the power switch is sensed by the zero crossing voltage and the switching frequency is restricted by a predetermined threshold frequency.
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