DC stabilized power supply with programmable wide-range output asymmetric half-bridge structure

Abstract

The invention discloses a DC stabilized power supply with a programmable wide-range output asymmetric half-bridge structure. The DC stabilized power supply with a programmable wide-range output asymmetric half-bridge structure in the technical scheme comprises a processor, an asymmetric half-bridge power conversion circuit, an overvoltage protection circuit, an overcurrent protection circuit and afeedback control circuit, wherein the processor controls the asymmetric half-bridge power conversion circuit; external mains supply is inputted to the asymmetric half-bridge power conversion circuitand DC stabilized power is outputted; the overvoltage protection circuit and the overcurrent protection circuit detect the output end of the asymmetric half-bridge power conversion circuit respectively; the detection output ends of the overvoltage protection circuit and the overcurrent protection circuit are connected with the input end of the processor; the detection end of the feedback control circuit is connected with the output end of the asymmetric half-bridge power conversion circuit; and the output end of the feedback control circuit is connected with the input end of the processor. Thepower supply disclosed in the invention has high efficiency, high precision and high stability.

Description

technical field [0001] The invention relates to a stabilized power supply processing, more specifically, it relates to a DC stabilized power supply with a programmable wide-range output asymmetrical half-bridge structure. Background technique [0002] In ordinary half-bridge circuits, the switching signals of the upper and lower bridge arms are symmetrical, and the output voltage is adjusted by the duty cycle. The maximum duty cycle is generally less than 0.5. There is a comparative dead zone between the two switch-on signals, and the leakage inductance energy is consumed by the buffer circuit. , it is difficult to achieve soft switching. In the asymmetrical half-bridge circuit, the driving signals of the two switching tubes are not symmetrical but complementary, which makes it easy to realize soft switching. However, the voltage regulation ability of the common asymmetrical half-bridge circuit is relatively poor, and it is not suitable for occasions where the voltage range...

AI Technical Summary

Problems solved by technology

However, the voltage regulation ability of the ordinary asymmetrical half-bridge circuit is relatively poor, and it is not suitable for occasions where the voltage range needs to be adjusted in a wide range.

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