DESCRIPTION

The

A2203A is an audio power amplifier primarily

designed for demanding applications in mobile

phones and other portable communication device

applications. It is capable of delivering 1 watt of

continuous average power to an 8Ω BTL load with

less than 1 distortion (THD+N) from a 5V DC power

supply. Boomer audio power amplifiers were

designed specifically to provide high quality output

power with a minimal amount of external components.

The A2203A does not require output coupling

capacitors or bootstrap capacitors, a nd therefore is

ideally suited for mobile phone and other low voltage

applications where minimal power consumption is a

primary requirement.

The

A2203A features a low power consumption

shutdown mode, which is achieved by driving the

shutdown pin with logic low. Additionally, the A2203A

features an internal thermal shutdown protection

mechanism. The A2203A contains advanced pop &

click circuitry which eliminates noises which would

otherwise occur during turn on and turn off

transitions. The A2203A is unity g ain stable and can

be configured by external gain setting resistors.

The

A2203A is available in MSOP8 and SOP8

packages

FEATURES

? Ultra low current shutdown mode

-

Shutdown Current 0.1μA(typ.)

? BTL output can drive capacitive loads

-

Power Output @V DD = 5.0V 1 THD 1W(typ.)

-

Power Output @V DD =3.3V &1 THD 400mW (

? Improved pop & click circuitry eliminates

noises during turn on and turn off transitions

-

PSRR @f IN =217Hz, V DD = 5V 62dB(typ.)

? 2.2 5.0V operation

? No output coupling capacitors, snubber

networks or bootstrap capacitors required

? Thermal shutdown protection

? Unity gain stable

? External gain configuration capability

? Available in MSOP8 and SOP8 p ackage s

APPLICATION

? Mobile Phones

? PDAs

? Portable electronic devices