APA2603

APA2603 3W Stereo Class D Audio Power Amplifier (with DC Volume Control) Features General Description The APA2603 is a stereo, high efficiency, filter-free ClassD audio amplifier available in SOP-16P and DIP-16 packages. The APA2603 provides the precise DC volume control, the gain range is from -80dB (V VOLUME =5V) to +20dB (VVOLUME=0V) 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. Besides, it can save the PCB space, system cost, and simplify the design and the power loss at filter. The APA2603 also integrates the de-pop circuitry that reduces the pops and click noises during power on/off or shutdown enable process. The APA2603 has build-in, over-current, and thermal protection that prevent the chip being destroyed by short circuit or over temperature situation. APA2603 is capable of driving 3W at 5V into 4Ω speaker. The efficiency can archive 85% at RL=4Ω when PO=3W at VDD=5V. Operating Voltage: 3.3V-5.5V High Efficiency 85% at PO=3W, 4Ω Speaker, VDD=5V Filter-Free Class D Amplifier Low Shutdown Current - IDD=1µA at VDD=5V 64 Steps Volume Adjustable from -80dB to +20dB by DC Voltage with Hysteresis Output Power at THD+N=1% - 2.6W at VDD=5V ,RL=3Ω - 2.4W at VDD=5V, RL=4Ω - 1.4W at VDD=5V, RL=8Ω Output Power at THD+N=10% ...