US 12,261,515 B2
Circuit control method and apparatus
Yuetian Wang, Shanghai (CN)
Assigned to Ace Power and Technology Co., Ltd, Shanghai (CN)
Filed by Ace Power and Technology Co., Ltd, Shanghai (CN)
Filed on Sep. 20, 2022, as Appl. No. 17/933,773.
Claims priority of application No. 202111640325.2 (CN), filed on Dec. 29, 2021.
Prior Publication US 2023/0208273 A1, Jun. 29, 2023
Int. Cl. H02M 1/00 (2007.01); H02M 3/335 (2006.01)
CPC H02M 1/0058 (2021.05) [H02M 1/0095 (2021.05); H02M 3/33571 (2021.05); H02M 3/33576 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A circuit control method applied to a hybrid flyback circuit, comprising:
determining an acquisition time point according to a turn-on alternating duration of a first MOS switch and a second MOS switch on a main side of the hybrid flyback circuit and a preset time coefficient;
acquiring a midpoint voltage between the first MOS switch and the second MOS switch according to the acquisition time point to obtain a first voltage signal; and
adjusting negative excitation current in the hybrid flyback circuit according to a comparison result of the first voltage signal and a preset voltage value, so that the negative excitation current meets zero voltage switching of a primary-side switch of the hybrid flyback circuit.