AN12941A Datasheet, PDF (1/41 Pages) Panasonic Semiconductor – The AN12941A is an amplifier IC for stereo speakers which can output 1 W by 8 Ohm or 2 W by 4 Ohm

ICs for Audio Common Use
AN12941A
Audio power IC for notebook PC
■ Overview
The AN12941A is an amplifier IC for stereo
speakers which can output 1 W by 8 Ω or 2 W by 4 Ω.
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."
of the speakers.
Also, to reduce power consumption, AN12941A
has a built-in function which automatically detects the
input signal and can automatically enter power save
mode when there is no signal.
■ Features
 Speaker amplifier is
1 W × 2-channel: 8 Ω, V_CC = 5 V or
2 W × 2-channel: 4 Ω, V_CC = 5 V
 Built-in AGC circuit
Prevention of the resonance or the vibration by
the speaker's energy and the clipping distortion
of the speaker 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 automatic power saving).
 Operating supply voltage: V_CC 3.0 V to 5.5 V/
V_CC_SP 3.0 V to 5.5 V
■ Applications
 Notebook PC, LCD monitor with speaker
Unit: mm
14.00±0.10
(6.90)
Area of no resin flash
(5.45)
56
29
1
(0.25)
28
(1.00)
0.10
0.50
0.20±0.05
0.10 M
Seating plane
0° to 8°
0.50±0.10
HSOP056-P-0300A (Lead-free package)
■ Block Diagram
Publication date: April 2004
Mix circuit
AGC
AGC
Automatic detection
Automatic power save
SDC00056AEB
1