Patent ID: 7379311

Claim:
An inrush current control circuit, comprising: a rectifying unit for rectifying an alternative current; a power factor correction circuit connected between the positive pole and negative pole of the rectifying unit; a capacitor connected between the power factor correction circuit and the negative pole of the rectifying unit; a first control unit placed between the rectifying unit and the power factor correction circuit including: a first current limiting resistor for preventing a suddenly-generated inrush current; and a first switch connected to the first current limiting resistor in parallel, wherein the first switch turns on based on the voltage of the capacitor, and therefore, the alternative current bypasses the first current limiting resistor; a second control unit connected with the first control unit in series including: a second current limiting resistor for preventing a suddenly-generated inrush current; and a second switch connected to the second current limiting resistor in parallel, wherein the second switch turns on based on the alternative current, and therefore, the alternative current bypasses the second current limiting resistor.