US 12,088,194 B2
Hybrid-mode power factor corrector and method of operating the same
Tsung-Liang Hung, Taoyuan (TW); and Shao-Hsien Chiu, Taoyuan (TW)
Assigned to ASIAN POWER DEVICES INC., Taoyuan (TW)
Filed by ASIAN POWER DEVICES INC., Taoyuan (TW)
Filed on Sep. 23, 2022, as Appl. No. 17/951,481.
Claims priority of application No. 111122843 (TW), filed on Jun. 20, 2022.
Prior Publication US 2023/0412069 A1, Dec. 21, 2023
Int. Cl. H02M 1/42 (2007.01); H02M 1/00 (2006.01); H02M 1/08 (2006.01); H02M 3/335 (2006.01); H02M 7/06 (2006.01)
CPC H02M 1/4241 (2013.01) [H02M 1/0058 (2021.05); H02M 1/08 (2013.01); H02M 3/33515 (2013.01); H02M 7/06 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A hybrid-mode power factor corrector, comprising:
a power factor correction circuit, configured to receive an input voltage, comprising a power inductor and a power switch,
a zero-crossing detection circuit, coupled to the power inductor, and configured to detect the resonance of a switch voltage between two ends of the power switch, and
a controller, coupled to the power switch and the zero-crossing detection circuit, and configure to control the switching of the power switch by an operation frequency to control the power factor correction circuit converting the input voltage into an output voltage, and control an input current drawn by the power factor correction circuit to follow the input voltage,
wherein the controller turns on the power switch when an inductor current flowing through the power inductor is to zero, the resonance of the switch voltage is close to a threshold value of the zero-crossing detection circuit, and a switching time of the power switch reaches to the operation frequency.