US 12,328,063 B2
Totem pole power factor correction circuit
Yuesen Guo, Shanghai (CN); and Kai Dong, Shanghai (CN)
Assigned to Delta Electronics (Shanghai) Co., Ltd., Shanghai (CN)
Filed by Delta Electronics (Shanghai) Co., Ltd., Shanghai (CN)
Filed on Apr. 24, 2023, as Appl. No. 18/138,587.
Claims priority of application No. 202210475921.8 (CN), filed on Apr. 29, 2022; and application No. 202310417476.4 (CN), filed on Apr. 18, 2023.
Prior Publication US 2023/0353046 A1, Nov. 2, 2023
Int. Cl. H02M 1/42 (2007.01)
CPC H02M 1/4233 (2013.01) 13 Claims
OG exemplary drawing
 
1. A totem pole power factor correction circuit electrically coupled with an input power source and a load, the totem pole power factor correction circuit comprising:
a first bridge arm comprising a first bypass diode and a second bypass diode connected in series, wherein a connection point between the first bypass diode and the second bypass diode is a first node;
a second bridge arm connected with the first bridge arm in parallel, wherein the second bridge arm comprises a first switch and a second switch connected in series, and a connection point between the first switch and the second switch is a second node;
a third bridge arm connected with the first bridge arm in parallel, wherein the third bridge arm comprises a third switch and a fourth switch connected in series, and a connection point between the third switch and the fourth switch is a third node, wherein the third node is electrically connected with a second terminal of the input power source;
a first inductor electrically connected between a first terminal of the input power source and the second node;
a detection module comprising a detection resistor and a detection circuit, wherein a first terminal of the detection resistor, the first node and a first terminal of the detection circuit are connected with each other, and a second terminal of the detection resistor, the first terminal of the input power source and a second terminal of the detection circuit are connected with each other, wherein a voltage difference between two terminals of the detection resistor is detected by the detection circuit and an output voltage is outputted from a third terminal of the detection circuit; and
a control unit electrically coupled with the third terminal of the detection circuit, and controlling the first switch, the second switch, the third switch and the fourth switch, wherein when the control unit confirms that the output voltage outputted by the detection circuit is greater than or equal to an upper limit voltage threshold or the output voltage outputted by the detection circuit is smaller than or equal to a lower limit voltage threshold, at least the third switch and the fourth switch are turned off under control of the control unit.