Patent ID: 9654024
Date: 2017-05-16
CPC Classifications: H02M,Y02B

Claim:
1. An AC-DC boost converter for power factor correction comprising: a totem-pole output circuit having first and second semiconductor switches connected between an output rail and a reference rail, each switch having a channel coupled to a central switching node and having a parasitic capacitance associated with the channel; an AC voltage source having a first terminal and a second terminal; an inductor having a first terminal connected to the switching node and having a second terminal connected to the first terminal of the AC voltage source; a first bypass device connected between the output rail and the second terminal of the AC voltage source; a second bypass device connected between the reference rail and the second terminal of the AC voltage source; an output capacitor and a load resistance having first terminals connected to the output rail and second terminals connected together; a shunt resistor having a first terminal connected to the reference rail and a second terminal connected to the second terminals of the output capacitor and the load resistance; and a shunt diode having a cathode terminal connected to the reference rail and an anode terminal connected to the second terminals of the output capacitor and the load resistances.