ELECTRONIC DEVICE AND POWER SUPPLY METHOD FOR SMART POWER AMPLIFIER

An electronic device and a power supply method for a smart power amplifier are provided, and relate to the field of terminal technologies. The electronic device includes a battery, a switch circuit, a boost circuit, a smart power amplifier, a speaker, and a controller. The battery is connected to a first end of the switch circuit, a second end of the switch circuit is connected to an input end of the smart power amplifier, a third end of the switch circuit is connected to an input end of the boost circuit, an output end of the boost circuit is connected to the input end of the smart power amplifier, and an output end of the smart power amplifier is connected to the speaker. The boost circuit is configured to perform boost conversion on an output voltage of the battery. The controller controls, when the output voltage of the battery is greater than or equal to a preset voltage, the first end and the second end of the switch circuit to be in communication; and controls, when the output voltage of the battery is less than the preset voltage, the first end and the third end of the switch circuit to be in communication, where the preset voltage is greater than a minimum working voltage of the smart power amplifier. In the solution, noise or interruption can be prevented from occurring in audio playback when the output voltage of the battery is low.