PURPOSE: An anti-malfunction circuit for a power factor correction circuit is provided to offset an inductor current flowing through a boost convertor to a certain degree, thereby preventing an interleaving power factor correction circuit from malfunctioning.;CONSTITUTION: A boost convertor module is connected to a first convertor and a second convertor in parallel. A first sensing unit (CT1) senses a first current that flows in the first convertor. A second sensing unit (CT2) senses a second current that flows in the second convertor. A first hysteresis comparison unit (C1) compares the first current and a preset critical value and outputs the result. A second hysteresis comparison unit (C1) compares the second current and a preset critical value and outputs the result. While implementing an offset of the first current and the second current, a control module (200) controls a first switching element and a second switching element in an interleaving manner based on the outputted comparison results of the first hysteresis comparison unit and the second hysteresis comparison unit.;COPYRIGHT KIPO 2013;[Reference numerals] (201) Electromagnetic interference filter
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