US 12,206,323 B2
Bridgeless power factor correction PFC circuit
Hua Jiang, Shenzhen (CN); Zejie Lv, Dongguan (CN); and Baoguo Chen, Dongguan (CN)
Assigned to Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed on Nov. 28, 2022, as Appl. No. 17/994,635.
Application 17/994,635 is a continuation of application No. PCT/CN2020/093368, filed on May 29, 2020.
Prior Publication US 2023/0089905 A1, Mar. 23, 2023
Int. Cl. H02M 1/42 (2007.01); H02M 1/00 (2006.01); H02M 1/44 (2007.01)
CPC H02M 1/4225 (2013.01) [H02M 1/0009 (2021.05); H02M 1/0058 (2021.05); H02M 1/44 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A power factor correction (PFC) circuit, comprising:
an alternating current power supply;
a low-frequency switch module comprising a switch element;
a power module comprising a first inductor; and
a control module comprising a current sampling element, wherein the alternating current power supply is configured to be connected to the low-frequency switch module by using the switch element and connected to the power module by using the first inductor, the low-frequency switch module is configured to be connected to the power module by using the switch element, the control module is:
configured to be connected to at least one of the power module and the low-frequency switch module by using the current sampling element
configured to control the switch element comprised in the low-frequency switch module to be turned on or turned off
configured to collects a current flowing through the current sampling element; and
when the current flowing through the current sampling element is greater than a first threshold, configured to controls the switch element to be turned on or turned off.