TheAPA2604C is a stereo, high efficiency, filter-free ClassD audio amplifier available in a SSOP-24 and QFN4x4- 20A packages. The APA2604C provide the precise DC volume control, the gain range is from +20dB (VVOLUME=0V) to -80dB (VVOLUME=5V) with 64 steps precise control. It’s easy to get the suitable amplifier’s gain with the 64 steps gain setting. The filter-free architecture eliminates the output filters compared to the traditional Class-D audio amplifier, and reduces the external component counts and the components high, it could save the PCB space, system cost, simplifies the design and the power loss at filter. APA2604C provides an AGC (Non-Clip) function, and this function can low down the dynamic range for large input signal. APA2604C can provide from 20dB to -80dB with 64 steps gain decrease for non-clipping function, and this function can avoid output signal clipping. The APA2604C also integrates the de-pop circuitry that reduces the pops and click noises during power on/off or shutdown enable process. The APA2604C has built-in over-current and thermal protection that prevent the chip being destroyed by short circuit or over temperature situation