ANPEC APA2603AQAI-TRG

The APA2603A is a stereo, high efficiency, filter-free ClassD audio amplifier available in a SOP-24 package. The APA2603A 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. APA2603A provides an AGC (Non-Clip) function, and this function can low down the dynamic range for large input signal. APA2603A can provide from 20dB to -80dB with 64 steps gain decrease for non-clipping function, and this function can avoid output signal clipping. The APA2603A also integrates the de-pop circuitry that reduces the pops and click noises during power on/off or shutdown enable process. The APA2603A has build-in over-current and thermal protection that prevent the chip being destroyed by short circuit or over temperature situation. APA2603A combines a stereo bridge-tied loads (BTL) mode for speaker drive and a stereo single-end (SE) mode for headphone drive into a single chip, where both modes are easily switched by the SE/BTL input control pin signal. APA2603A is capable of driving 2.8W at 5V into 4Ω speaker. The efficiency can archived 85% at RL = 4Ω when P0 = 2.8W at VDD = 5V. APA2603A is capable of driving 60mW at 5V into 32Ω Headphone

• Operating Voltage: 3.3V - 5.5V
• High Efficiency 85% at P0 = 2.8W, 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
• AGC (Non-Clip) Function - Disable: 0.45VDD~VDD, Floating - Max, Power: GND
• UVP Function - Disable: Floating
• Output Power at THD+N = 1% BTL Mode - 2.25W at VDD = 5V, RL = 4Ω - 1.3W at VDD = 5V, RL = 8Ω SE Mode - 68mW at vop = 50, RL = 32Ω
• Output Power at THD+N = 10% - 2.8W at VDD = 5V, RL = 4Ω - 1.6W at VDD = 5V, RL = 8Ω
• Less External Components Required
• Two Output Modes Allowable with BTL and SE Modes Selected by SE/BTL Pin Input Signal and Headphone Output Signal in Phase
• Thermal and Over-Current Protections with Auto-Recovery
• Power Enhanced Packages SOP-24(300mil), Dip 24(300mil)
• Lead Free and Green Devices Available (RoHS Compliant)

• LCD TVs
• DVD Player
• Active Speakers