Bipolar output PFC topological circuit and implementation method thereof

The invention provides a bipolar output PFC topological circuit which comprises a Boost inductor L1, a polarity correcting rectifier bridge and a synchronous rectifier bridge. The Boost inductor L1 is in series connection with a mains supply, the polarity correcting rectifier bridge is in series connection with the Boost inductor L1, and the synchronous rectifier bridge is in parallel connection with the polarity correcting rectifier bridge. The drain electrode of a boost MOS tube Q1 is connected with the cathode of a first diode D1 and the cathode of a third diode D3 in the polarity correcting rectifier bridge respectively. The source electrode of the boost MOS tube Q1 is connected with the anode of a second diode D2 and the anode of a fourth diode D4 in the polarity correcting rectifier bridge respectively. A voltage stabilizing diode and a first capacitor are in parallel connection between the source electrode and the drain electrode of the boost MOS tube Q1, the cathode of the voltage stabilizing diode is connected with the drain electrode of the boost MOS tube Q1, and the anode of the voltage stabilizing diode is connected with the source electrode of the boost MOS tube Q1. Wider space is provided for circuit choosing of a UPS backward stage inverter circuit, and the bipolar output PFC topological circuit is suitable for being applied in novel miniaturization products.