APA2071

APA2071 Stereo 3.1W Non-inverting Audio Power Amplifier(with DC Volume Control) Features General Description Non-Inverting Audio Power Amplifier The APA2071 is a monolithic integrated circuit, which Low Operating Current about 9mA (Typical) Improved Depop Circuitry to Eliminate Turn-On and Turn-Off Transients in Outputs 32-Step Volume Adjustable by DC Voltage with Hysteresis Output Power provides precise DC volume control, and a stereo bridged audio power amplifiers capable of producing 2.6W (2W) into 4Ω with less than 10% (1.0%) THD+N. The attenuator range of the volume control in APA2071 is from 18dB (VVOLUME=0V) to -80dB (VVOLUME=3.54V) with 32 steps. The advantage of internal gain setting can be less components and PCB area. Both the depop circuitry and at 1% THD+N the thermal shutdown protection circuitry are integrated - 2.4W, at VDD=5V, BTL Mode, RL=3Ω - 2W, at V =5V, DD BTL Mode, RL=4Ω at 10% THD+N in the APA2071, that reduce pops and clicks noise during power up or shutdown mode operation. It also improves the power off pop noise and protects the chip be- - 3.1W, at VDD=5V, BTL Mode, RL=3Ω ing destroyed by over temperature and short current - 2.6W, at VDD=5V, BTL Mode, RL=4Ω Two Output Modes: BTL and SE Modes Selected failure. To simplify the audio system design, the APA2071 combines a stereo bridge-tied load (BTL) mode for speaker drive and a stereo single-end (SE) mode for head- by SE/BTL Pin phone drive into a single chip, wh...