Publication date: June 2003

1

SDC00047AEB

ICs for Audio Common Use

AN12942B

Audio signal processing IC for notebook PC

Overview

AN12942B is an one-chip IC for the stereo speakers which can output 1 W by 8

Ω, headphone amplifiers, line amplifiers, and

electronic volumes.

The AGC circuit is built-in to prevent the resonance or the vibration by the speaker’s energy and the clipping distortion what is

called "broken up sound".

Also the AN12942B is built-in power saving on/off function automatically detecting input signal to save the power of speaker

amplifier.

Features

• Speaker amplifier

1 W

• Built-in AGC circuit

Prevention of the resonance or the vibration due to the speaker and the clipping distortion by AGC at excessive input signal

(with AGC on/off switch).

• Built-in automatic power saving function.

It detects input signals and switches on/off (with the on/off switch for the auto power saving).

•Built-in headphone amplifier and line amplifier

Applications

• Notebook PC

Package

• Dual surface implementing package (HSOP056-P-0300A)

Type

• Silicon monolithic bipolar IC