General Description

The APA4838 is a monolithic integrated circuit , which provides DC volume control , and a stereo bridged audio power amplifiers capable of producing 2.8W (2.3W) into 3? with less than 10 (1.0) THD+N. APA4838 includes a DC volume control , stereo bridge-tied and single-ended audio power amplifiers , stereo docking outputs , and a selectable gain control , that makes it optimally fittable for notebook PC, multimedia monitors, and other portable applications.

特性 Features

? Operating Voltage : 4.5V to 5V

? Stereo switchable bridged/single-ended power amplifiers

? DC Volume Control Interface , 0dB to –78dB with precision scale

? Supply Current, IDD = 15mA at Stereo BTL

? Low Shutdown Current, IDD = 0.7μA

? Bridge-Tied Load (BTL) or Single-Ended-(SE) Modes Operation

? Output Power at 1 THD+N , VDD=5V

– 2.3W/Ch (typ) into a 3 ? Load

– 2.0W/Ch (typ) into a 4 ? Load

– 1.2W/Ch (typ) into a 8 ? Load

? Output Power at 10 THD+N , VDD=5V

– 2.8W/Ch (typ) into a 3 ? Load

– 2.3W/Ch (typ) into a 4 ? Load

– 1.5W/Ch (typ) into a 8? Load

? Single-ended mode at 1.0 THD+N

– 95mW/Ch (typ) into 32? Load

? Depop Circuitry Integrated

? Thermal shutdown protection and over current protection circuitry

? High supply voltage ripple rejection

? PC99 Compliant

? 28-pin TSSOP-P (with enhanced thermal pad) power package available

Applications

? Notebook and Desktop Computers

? Multimedia Monitors

? Portable Applications