Self-oscillating flyback converter with function of output short circuit protection

A flyback converter, output short-circuit technology, applied in output power conversion devices, emergency protection circuit devices, DC power input conversion to DC power output, etc., can solve the problem of MOS tube energy consumption. Increase power consumption, complex circuit structure and other problems, to achieve the effect of improving power efficiency, reducing short-circuit loss, and small size
CN101997423BInactive Publication Date: 2012-09-05MORNSUN GUANGZHOU SCI & TECH
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
MORNSUN GUANGZHOU SCI & TECH
Publication Date
2012-09-05
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention discloses a self-oscillating flyback converter with the function of output short circuit protection, which sequentially comprises an input filter circuit, a main power circuit, an output filter circuit and an output short circuit protection circuit, wherein the main power circuit comprises a transformer primary winding, an output winding and a switching tube, so that energy conversion, energy transfer and the isolation of input and output are realized; and the output short circuit protection circuit is arranged in a negative feedback circuit of the main power circuit. The self-oscillating flyback converter can simplify a circuit structure of the output short circuit protection circuit, and is favorable for reducing circuit loss.
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Description

technical field

[0001] The invention relates to a low-power DC-DC conversion power supply, in particular to a self-oscillating flyback converter with an output short-circuit protection function for the conversion power supply. Background technique

[0002] Since the self-oscillating flyback converter requires smaller and smaller volume, higher frequency and higher power density. Therefore, the requirements for output short-circuit protection are getting higher and higher, especially in the case of output short-circuit, the internal loss of the converter is required to be smaller. This requires additional peripheral circuits to realize the output short-circuit protection of the self-oscillating flyback converter. At present, some technical solutions for realizing such functional circuits are relatively mature, but their common disadvantages are that there are many peripheral components, and at the same time, development costs and technical difficulties are increased. [000...

Claims

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