Audio Frequency Amplifier refers to audio power amplifier IC in this news. The Audio Frequency Amplifier is mainly used in the audio signal amplification of multimedia playback equipment. Its function is to amplify the weak signal from the audio source or the output of the pre-amplifier, and drive the playback equipment to emit sound. Audio Frequency Amplifier is the core component of multimedia playback equipment, which determines the sound quality and work efficiency of playback equipment. With the development of audio power amplifier technology, audio power amplifier chips have gradually evolved from analog chips to digital-analog mixed-signal chips.