POWER FACTOR CORRECTION CIRCUIT AND POWER SUPPLY HAVING THE SAME

摘要

The present invention relates to a power factor correction circuit and a power supply including the same. The power factor correction circuit of the present invention includes a snubber circuit unit including a main switch which controls a phase difference between the current of an input power supply and the voltage of the input power supply, a main inductor which accumulates or emits energy according to the switching of the main switch, a snubber switch which forms a delivery path of a surplus power supply which exists before the on-operation of the main switch, and a snubber inductor which controls the amount of current which is applied in the snubber switch; and a reduction circuit unit including an auxiliary inductor which is inductively coupled with the snubber inductor and an auxiliary resistance which consumes energy which is induced from the snubber inductor through the auxiliary inductor.