Power factor correction device, power supply, and motor driver

A power factor correction device comprising:

• a first switch switching input power to adjust a phase difference between a current and a voltage of the input power;
• a second switch switched on before the first switch is switched on so as to form a transfer path for residual power in the first switch;
• a first inductor connected between a power input terminal for supplying the input power and the first switch;
• and
• a second inductor connected between a connection terminal between the first switch and the first inductor, and the second switch,
• wherein the first inductor and the second inductor are inductively coupled.

A power supply comprising:

• a power factor correction circuit including a first inductor charging and discharging energy according to switching of a first switch and a second inductor adjusting an amount of current flowing through a second switch according to switching of the second switch;
• a power converting unit switching power from the power factor correction circuit to convert the power to a previously set power;
• and
• a switching control unit controlling power switching of the power converting unit.

A motor driver comprising:

• a power factor correction circuit including a first inductor charging and discharging energy according to switching of a first switch and a second inductor adjusting an amount of current flowing through a second switch according to switching of the second switch;
• a driver switching power from the power factor correction circuit to drive a motor;
• and
• a driving control unit controlling power switching of the driver.