CPC H02M 7/219 (2013.01) [H02M 5/293 (2013.01)] | 20 Claims |
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.
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