US 11,817,795 B2
Switching power supply circuit
Jian Deng, Hangzhou (CN); Chen Zhao, Hangzhou (CN); Yunlong Han, Hangzhou (CN); and Qiukai Huang, Hangzhou (CN)
Assigned to Silergy Semiconductor Technology (Hangzhou) LTD, Hangzhou (CN)
Filed by Silergy Semiconductor Technology (Hangzhou) LTD, Hangzhou (CN)
Filed on Sep. 17, 2021, as Appl. No. 17/477,775.
Claims priority of application No. 202011026976.8 (CN), filed on Sep. 25, 2020.
Prior Publication US 2022/0103089 A1, Mar. 31, 2022
Int. Cl. H02M 7/219 (2006.01); H02M 5/293 (2006.01)
CPC H02M 7/219 (2013.01) [H02M 5/293 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A switching power supply circuit, comprising:
a) an energy storage capacitor;
b) a high-frequency switching network coupled to the energy storage capacitor, and being configured to receive a low-frequency AC input voltage, to charge the energy storage capacitor, to perform high-frequency chopping on the low-frequency AC input voltage and/or a voltage of the energy storage capacitor, and to generate a high-frequency AC signal;
c) a rectifier module coupled to the high-frequency switching network, and being configured to receive the high-frequency AC signal, to rectify the high-frequency AC signal, and to generate a DC signal; and
d) wherein the high-frequency switching network comprises an energy storage module and a switching circuit, the switching circuit having a low-frequency AC input terminal, a first power switch, and a second power switch that are coupled in series between a first node and a second node, wherein the energy storage module is coupled between the first node and the second node.