Power supply method and device for audio power amplifier circuit and audio playback device

Abstract

The invention discloses a power-supplying method and a power-supplying device of an audio power-amplifying circuit and audio playing equipment, wherein the power-supplying device comprises a storage unit, a detecting circuit, a control unit and a power-supply module with adjustable power-supply voltage; the power-supply module is used for supplying power for the audio power-amplifying circuit; the storage unit is used for storing at least two groups of corresponding relations which respectively comprise preset output power which is output by the audio power-amplifying circuit and preset power-supplying voltage which is output by the power-supply module; the detecting circuit is used for detecting current output power in real time; the control unit is used for selecting the preset output power which is most approximate to and is greater than or equal to the current output power from the corresponding relations stored in the storage unit and regulating the current power-supplying voltage of the power-supply module into the preset power-supplying voltage corresponding to the selected preset output power. According to the power-supplying device, the deficiencies of lower power-amplifying efficiency and energy-source waste of an existing audio power-amplifying circuit are overcome, and the power-supplying device has the beneficial effect of enabling the power-amplifying efficiency of the audio power-amplifying circuit to be always kept the highest.

Description

technical field [0001] The invention relates to a power supply method and device for an audio amplifier circuit and audio playback equipment. Background technique [0002] Existing audio power amplifier circuits are often powered by a power supply with a fixed voltage, which results in a fixed power supply voltage input to the audio power amplifier circuit. For the audio power amplifier circuit, when the same power supply voltage is used, the efficiency of the power amplifier is sometimes high and sometimes low, especially when the efficiency of the power amplifier is low, it causes a waste of energy, reduces the use time of the power supply, and also affects the audio power amplifier circuit itself. performance. Contents of the invention [0003] The technical problem solved by the present invention is to overcome the defects of low power amplifier efficiency of the audio power amplifier circuit in the prior art, resulting in waste of energy, and reducing the power suppl...

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Problems solved by technology

[0003] The technical problem solved by the present invention is to overcome the defects of low power amplifier efficiency of the audio power amplifier circuit in the prior art, resulting in waste of energy, and reducing the power supply time, and to provide an audio amplifier that can keep the power amplifier efficiency of the audio power amplifier circuit at the highest level. Power supply method and device for power amplifier circuit and audio playback equipment

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