"XZ2303FN is a non-filter, 3W with digital volume control of Class-D stereo audio power amplifier, can 
 Provide high-quality sound. Low-EMI PWM modulation circuit mode, so eliminating the need for conventional Class D amplifier, low pass 
 Filter directly drives the speaker, and saves system cost and PCB space. With power than Class AB 
 Amplifier more efficient, so you can extend the battery life is ideal for portable applications. "