Temperature adaptive audio amplifier device and control method thereof

A device adapted for coupling to a speaker comprising:

• a digital and analog converter configured for receiving and converting a digital audio to an analog audio signal;
• a gain controller coupled to the digital and analog converter and configured to perform gain processing on the analog audio signal and generate a gained analog audio signal;
• an amplifier coupled to the gain controller and configured to amplify the gained analog audio signal and generate an amplified analog audio signal;
• a temperature sensor coupled to the amplifier and configured for generating a temperature detection signal based on a junction temperature of the amplifier;
• and
• a decision circuit coupled between the temperature sensor and the gain controller and configured for receiving the temperature detection signal transmitted by the temperature sensor and for generating a corresponding gain adjustment signal to the gain controller;
• wherein the decision circuit configures the gain adjustment signal for adjusting the junction temperature of the amplifier to be below an upper temperature threshold.