US 12,328,064 B2
Noise suppression method and apparatus for totem pole PFC circuit, and electronic device
Ken Chin, Shenzhen (CN); Shanglin Mo, Dongguan (CN); Shuaibing Wang, Dongguan (CN); and Liangyun Kang, Shenzhen (CN)
Assigned to Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Digital Power Technologies Co., Ltd., Shenzhen (CN)
Filed on Jul. 3, 2023, as Appl. No. 18/346,679.
Claims priority of application No. 202210783645.1 (CN), filed on Jul. 5, 2022.
Prior Publication US 2024/0014731 A1, Jan. 11, 2024
Int. Cl. H02M 1/42 (2007.01); H02M 1/00 (2007.01)
CPC H02M 1/4233 (2013.01) [H02M 1/0038 (2021.05)] 20 Claims
OG exemplary drawing
 
13. An electronic device, comprising at least one power factor correction (PFC) apparatus with noise suppression, the at least one PFC apparatus with noise suppression comprising a totem pole PFC circuit, an input voltage detection circuit, and a control circuit, wherein:
the input voltage detection circuit is configured to: sample an alternating current at an input end of the totem pole PFC circuit, and provide a voltage of the alternating current to the control circuit; and
the control circuit is configured to:
send a control signal to a third switch or a fourth switch in response to a determination that the voltage of the alternating current at the input end is switched at a zero crossing in which the voltage of the alternating current switches from a positive half cycle to a negative half cycle or from the negative half cycle to the positive half cycle, the third switch is configured to enable a PFC inductor in the totem pole PFC circuit to charge or discharge when the voltage of the alternating current is in the negative half cycle, the fourth switch is configured to enable the PFC inductor to charge or discharge when the voltage of the alternating current is in the positive half cycle, and the control signal is configured to enable the third switch or the fourth switch to be in an on state;
stop sending the control signal to the third switch or the fourth switch after the third switch or the fourth switch is on for a first set period of time; and
send the control signal to the third switch or the fourth switch after the third switch or the fourth switch is off for a second set period of time.