Bridgeless power-factor correction converter

A bridgeless power factor correction converter includes an input power supply (AC), a first inductor (L1A), a second inductor (L1B), a first switching transistor (S1), a second switching transistor (S2), a first diode (D1), a second diode (D2), and an output capacitor (Co). The first terminal of the input power supply (AC) is connected with the anode of the first diode (D1) through the first inductor (L1A). The second terminal of the input power supply (AC) is connected with the anode of the second diode (D2) through the second inductor (L1B). The cathode of the first diode (D1) and the cathode of the second diode (D2) are connected with one terminal of the output capacitor (Co). The other terminal of the output capacitor (Co) is connected with the anode of the first diode (D1) and the anode of the second diode (D2) through the first switching transistor (S1) and the second switching transistor (S2). The converter further includes a selective conduction unit (D3). The other terminal of the output capacitor (Co) is connected with the first switching transistor (S1) and the second switching transistor (S2) through the selective conduction unit (D3). The common-mode noise of the power factor correction converter can be reduced effectively by setting the selective conduction unit (D3).