APA4838 Datasheet | ANPEC

Stereo 2.8W Audio Power Amplifier with DC Volume Control and Selectable Gain Features General Description - Operating Voltage : 4.5V to 5V The APA4838 is a monolithic integrated circuit , which - Stereo switchable bridged/single-ended power amplifiers provides DC volume control , and a stereo bridged audio power amplifiers capable of producing 2.8W (2.3W) into 3Ω with less than 10% (1.0%) THD+N. - DC Volume Control Interface , 0d B to - 78d B APA4838 includes a DC volume control , stereo bridge-tied and single-ended audio power amplifiers with precision scale , stereo docking outputs , and a selectable gain con- - Supply Current , IDD = 15m A at Stereo BTL - Low Shutdown Current , IDD = 0.7µA trol , that makes it optimally fittable for notebook PC , multimedia monitors , and other portable applications. The attenuator range of the volume - Bridge-Tied Load (BTL) or Single-Ended-(SE) control in APA4838 is from 0d B (DC_Vol=0.8VDD) to Modes Operation - Output Power at 1% THD+N , V =5V DD - 78d B (DC_Vol=0V) with 31 steps. Both of the depop circuitry and the thermal shutdown protection circuitry are integrated in APA4838 , that reduces pops and - 2.3W/Ch (typ) into a 3 Ω Load clicks noise during power up or shutdown mode op- - 2.0W/Ch (typ) into a 4 Ω Load eration , and protects the chip from being destroyed by over temperature failure. To simplify the audio - 1.2W/Ch (typ) into a 8 Ω Load - Output Power at 10% THD+N , VDD=5V - 2.8W/Ch (typ) into a 3 Ω Load system design , APA4838 bines a stereo bridgetied 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 - 2.3W/Ch (typ) into a 4 Ω Load - 1.5W/Ch (typ) into a 8Ω Load - Single-ended mode at 1.0% THD+N - 95m W/Ch (typ) into 32Ω Load by the HP Sense input control pin signal. Besides the low supply current design to increase the efficiency of the amplifiers , APA4838 also Features a shutdown...