High-frequency transform type power supply and audio power amplification processing circuit with same

Abstract

The invention discloses a high-frequency transform type power supply which comprises a rectification and filtration circuit, wherein the rectification and filtration circuit can directly rectify and filter AC commercial power to obtain stable direct current. And the high-frequency transform type power supply particularly comprises a starting protection oscillation circuit, a commutation circuit and a transform self excited oscillation circuit which are electrically connected with the rectification and filtration circuit, wherein the transform self excited oscillation circuit comprises a half-bridge AC transform circuit. During processing power supplies, the high-frequency transform type power supply does not neglect any noise on the power grid, can get rid of thermal noise generated by electron motion on circuits ideally, and enable current to move in the form of a complete sinusoidal wave at the same time so that the current self can not generate a harmful wave to flow into output circuits. Since the transform self excited oscillation circuit comprises a half-bridge AC transform circuit, the structure of the whole high-frequency transform type power supply becomes simpler and the cost is lower. An audio power amplification processing circuit equipped with the high-frequency transform type power supply has the same advantages.

Description

technical field [0001] The invention relates to a switching power supply, in particular to a high-frequency conversion power supply that can be applied to an audio amplifier system. [0002] The present invention also relates to an audio power amplifier processing circuit using the power supply with the above structure. Background technique [0003] Audio is the crystallization of technology and art. With the development of economy and the improvement of people's living standards, people's pursuit of audio is getting higher and higher. They are no longer satisfied with the simple appreciation of music in the past, but pursue the "high fidelity" of music. , that is, the sound reproduced by the audio equipment is highly similar to the sound emitted by the sound source during recording at the recording site ("authentic"), giving the audience a real sense of presence. [0004] However, when electrons flow on the circuit, heat energy is generated, which in turn generates thermal...

AI Technical Summary

Problems solved by technology

If the ordinary switching power supply is applied to the audio power amplifier system, it will bring the following problems: 1. The output voltage of the switching power supply will not change dynamically with the load change, and cannot meet the dynamic response requirements of the audio power amplifier system

2. When the output power is too large, the internal loss of the audio power amplifier system is very large, and the circuit power device overheats or even burns the circuit

This kind of audio power amplifier system switching power supply can reduce internal loss, but this kind of power supply circuit is still relatively complicated, and the implementation cost is high

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