High-voltage input resonance circuit and electronic equipment

Abstract

The invention discloses a high-voltage input resonance circuit and electronic equipment, and relates to the technical field of resonance circuits. The circuit comprises an input voltage and a resonance unit; a first input capacitor and a second input capacitor which are connected in series and then arranged at two ends of the input voltage; and a first switching tube, a second switching tube and athird switching tube which are connected in series and then arranged at two ends of the input voltage. If the first switching tube and the third switching tube are communicated and are in complementary conduction with the second switching tube, the resonance unit obtains energy from the first input capacitor and the second input capacitor and converts the energy into output high-frequency voltage; and if the first switching tube and the third switching tube are alternately conducted within the non-conduction time of the second switching tube, the resonance unit alternately acquires energy from the first input capacitor and the second input capacitor and converts the energy into output high-frequency voltage. The input voltage is divided to rear circuits through series connection of the two capacitors at the input end, so that high-voltage input can be achieved, and meanwhile, the resonance circuit can work in a low-voltage state.

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...

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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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