POWER FACTOR CONTROL DEVICE

摘要

PURPOSE: A power factor compensation control device is provided to reduce a manufacturing cost and to reduce the whole area by sharing an external comparator for a function signal with a comparator in an ADC(Analog-Digital Convertor). CONSTITUTION: A power factor compensation control unit(140) includes an inner voltage generating unit(141), a mux unit(142), an ADC(144), a digital operating unit(146), and an output unit(148). The inner voltage generating unit generates an external supply voltage(VDD) as an inner voltage(Vin) to provide the voltage to the digital operating unit. The mux unit muxes an input voltage(IAC) and an output voltage(IFB) to generate an ADC input signal(ADC_in). The ADC receives a function signal(Func_in) and the ADC input signal at the same time. The ADC selectively outputs one of the ADC input signal and the function signal based on a switch enable signal. The output unit generates a signal outputted from the digital operating unit as a control signal(GD) to provide the signal to the power factor compensation control unit. [Reference numerals] (141) Inner voltage generating unit; (142) Mux unit; (146) Digital operating unit; (148) Output unit;