US 12,395,073 B2
Method and apparatus for controlling totem-pole PFC circuit, and electronic device
Ken Chin, Shenzhen (CN); Shanglin Mo, Dongguan (CN); and Shuaibing Wang, Dongguan (CN)
Assigned to Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed on Jul. 5, 2023, as Appl. No. 18/347,040.
Claims priority of application No. 202210783696.4 (CN), filed on Jul. 5, 2022.
Prior Publication US 2024/0014733 A1, Jan. 11, 2024
Int. Cl. H02M 1/42 (2007.01); H02M 1/00 (2006.01)
CPC H02M 1/4266 (2013.01) [H02M 1/0009 (2021.05); H02M 1/0058 (2021.05); H02M 1/4233 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for controlling a totem-pole PFC circuit, wherein the method is performed by a controller, the method comprising:
sampling an electrical parameter of a PFC inductor in the totem-pole PFC circuit;
determining duration of a previous switching period of the totem-pole PFC circuit based on the electrical parameter of the PFC inductor, wherein the duration of the previous switching period is determined based on duration of previous charging of the PFC inductor and duration of previous discharging of the PFC inductor; and
sending a control signal to a first switch when the duration of the previous switching period is less than specified switching duration, wherein the first switch is a switch that enables the PFC inductor to be discharged when an alternating current of an input end of the totem-pole PFC circuit is in a positive half period, and the control signal is used to enable a bootstrap capacitor in a bootstrap circuit coupled to the switch to be discharged.