Electronic equipment and power supply method of intelligent power amplifier

Abstract

The invention discloses electronic equipment and a power supply method of an intelligent power amplifier, and relates to the technical field of terminals. The electronic equipment comprises a battery, a switching circuit, a booster circuit, an intelligent power amplifier, a loudspeaker and a controller. The battery is connected with the first end of the switching circuit, the second end of the switching circuit is connected with the input end of the intelligent power amplifier, the third end of the switching circuit is connected with the input end of the booster circuit, the output end of the booster circuit is connected with the input end of the intelligent power amplifier, and the output end of the intelligent power amplifier is connected with the loudspeaker. The boost circuit performs boost conversion on the voltage output by the battery. When the output voltage of the battery is greater than or equal to a preset voltage, the controller controls the first end and the second end of the switching circuit to be connected; when the output voltage of the battery is smaller than the preset voltage, the first end and the third end of the switching circuit are controlled to be connected, and the preset voltage is larger than the minimum working voltage of the intelligent power amplifier. According to the scheme, noise or interruption of the audio loudspeaker when the output voltage of the battery is relatively low can be avoided.

Description

technical field [0001] The present application relates to the field of terminal technology, and in particular, to an electronic device and a power supply method for an intelligent power amplifier. Background technique [0002] With the continuous development of technology, the replacement of electronic equipment is getting faster and faster, and audio performance, as an important performance indicator of electronic equipment, is also a key area of ​​technological development and updating. [0003] The combination of smart power amplifier (Smart Power Amplifier, Smart PA) and speaker (Speak, SPK) is the main development direction of the industry, which can effectively improve a series of performances such as loudness and sound quality of external audio of electronic equipment. [0004] The Smart PA is powered by the battery of the electronic device. When the Smart PA is working, the voltage of the input terminal must be greater than or equal to its working voltage, otherwise ...

AI Technical Summary

Problems solved by technology

At this time, in some scenarios, if the volume of the external speaker suddenly increases, or the external audio resource is in the high-pitched stage, the output power required by the speaker increases instantaneously, that is, the instantaneous power output by the Smart PA increases, so that the battery needs to output The current also undergoes a momentary increase in

However, due to the impedance on the line between the battery and the voltage input terminal of the Smart PA, when the output current of the battery increases, the instantaneous voltage division of the impedance increases, causing the voltage connected to the voltage input terminal of the Smart PA to drop. When the voltage of the PA voltage input terminal drops below the operating voltage, the Smart PA triggers to stop working, which will make the speaker unable to continue to work normally, and there will be noise or interruption in the audio playback scene

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