Driving apparatus for power switching and power factor correction apparatus having theeof and power supply having thereof

PURPOSE: A driving apparatus for a power switching, a power factor correcting apparatus thereof, and a power supply apparatus thereof are provided to control the power switching, thereby reducing a circuit size. CONSTITUTION: A first driver provides a switching signal. A second driver (120) switches complementarily according to the switching signal. The second driver provides a switching control signal which controls a power switching. A current supply unit (130) supplies necessary current for the second driver. A voltage maintenance part (140) maintains necessary voltage for the second driver. [Reference numerals] (110) First driving unit; (130) Current supply unit; (140) Voltage maintenance unit; (AA) External control circuit; (BB) Power switch