Bridge-free voltage reduction APFC circuit

The invention discloses a bridge-free voltage reduction APFC circuit. The bridge-free voltage reduction APFC circuit comprises a controller, a switching tube T1, a switching tube T2, a diode D1, a diode D2, an inductor L1, an inductor L2, a capacitor C and a load R. According to the technical scheme, the switching tube T1, the diode D1 and the inductor L1 form a first buck circuit, and the switching tube T2, the diode D2 and the inductor L2 form a second buck circuit; the double voltage reduction buck circuits are adopted, and therefore a single-phase rectification bridge can be omitted for the system, the single-stage PFC and voltage reduction function is achieved, and a low-voltage direct current power supply is outputted. According to the technical scheme, when the bridge-free voltage reduction APFC circuit is applied to the AC-DC conversion low-voltage direct current power supply, the circuit series can be simplified, cost can be reduced, the size can be reduced, and the bridge-free voltage reduction APFC circuit has important application value, and the various defects of an existing APFC circuit are overcome.