Resonant circuits and electronic equipment with high voltage input

Abstract

The invention discloses a high-voltage input resonant circuit and electronic equipment, and relates to the technical field of resonant circuits. The invention comprises: an input voltage and a resonant unit; a first input capacitor and a second input capacitor connected in series and at both ends of the input voltage; a first switch tube, a second switch tube and a third switch tube connected in series and at both ends of the input voltage ; If the first switch tube and the third switch tube are in common and are complementary to the second switch tube, the resonance unit obtains energy from the first input capacitor and the second input capacitor and converts it into an output high-frequency voltage; if the first switch The tube and the third switch tube are alternately turned on during the non-conduction time of the second switch tube, and the resonant unit alternately obtains energy from the first input capacitor and the second input capacitor and converts it into an output high-frequency voltage. The invention divides the input voltage to the following circuit through the series connection of two capacitors at the input end, realizes high-voltage input, and enables the resonant circuit to work in a low-voltage state at the same time.

Description

technical field [0001] The invention belongs to the technical field of resonant circuits, in particular to a high-voltage input resonant circuit and electronic equipment. Background technique [0002] In switching power supplies, the high efficiency and high density of the resonant circuit are often used in high-power applications. The resonant circuit includes at least two complementary conduction switch tubes, resonant inductors, resonant capacitors and transformers. For high-voltage input, the switching tube and resonance capacitor of the resonant circuit need to choose a very large withstand voltage to meet the stress problem caused by the higher input, so the cost is very high. Contents of the invention [0003] The purpose of the present invention is to provide a high-voltage input resonant circuit and electronic equipment. Through the series connection of two capacitors at the input end, the input voltage is divided to the subsequent circuit, that is, the input volt...

AI Technical Summary

Problems solved by technology

[0002] In switching power supplies, the high efficiency and high density of the resonant circuit are often used in high-power applications. The resonant circuit includes at least two complementary conduction switch tubes, resonant inductors, resonant capacitors and transformers. For high-voltage input, the switching tube and resonance capacitor of the resonant circuit need to choose a very large withstand voltage to meet the stress problem caused by the higher input, so the cost is very high

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