Interleaved buck-boost power factor correction circuit

An interleaved buck-boost PFC (power factor correction) circuit, comprising:

• a rectifier module, configured to receive an AC input voltage;
• two converter circuits, electrically connected in parallel between the rectifier module and an output port of the interleaved buck-boost PFC circuit, wherein a DC output voltage at the output port is lower than a peak value of the AC input voltage, and each of the two converter circuits comprises:
• a first switch and a first diode, electrically connected in series and coupled to the rectifier module;
• a second switch and a second diode, electrically connected in series and coupled to the output port, wherein the first diode and the second switch are further coupled to a ground terminal;
• and
• an inductor, electrically connected between a connection node of the first switch and the first diode and a connection node of the second switch and the second diode;
• and
• a PWM (pulse width modulation) controller and a high-voltage driver, wherein for each of the two converter circuits, the PWM controller provides a first control signal to the first switch through the high-voltage driver and provides a second control signal to the second switch directly,
• wherein the first switch and the second switch in each of the two converter circuits are turned on and off simultaneously, and two said first control signals of two said first switches of the two converter circuits interleave at least partially.