1results about How to "Small circuit size" patented technology

This invention relates to a bridgeless PFC circuit structure and power supply device. The circuit includes a first switching transistor, a first energy storage inductor, a first EC charging module, a second EC charging module, and a charging control module. One end of the first energy storage inductor is connected to the live wire terminal of the power supply device, one end of the first EC charging module, and one end of the second EC charging module. The other end of the first energy storage inductor is connected to the first terminal of the first switching transistor, the other end of the first EC charging module, and the other end of the second EC charging module. The second terminal of the first switching transistor is connected to the neutral wire terminal of the power supply device. The charging control module is connected to the third terminal of the first switching transistor, the first EC charging module, and the second EC charging module, respectively, to control the conduction or cutoff of the first switching transistor, the first EC charging module, and the second EC charging module. This reduces circuit losses caused by the rectifier bridge, improves circuit efficiency, and reduces circuit size.