Global Mixed-mode Technology Inc.
G1431
2W Stereo Audio Amplifier
Features
Internal Gain Control, Which Eliminates Exter-
nal Gain-Setting Resistors
Depop Circuitry Integrated
Output Power at 1% THD+N, VDD=5V
--2.0W/CH (typical) into a 4Ω Load
--1.2W/CH (typical) into a 8Ω Load
Bridge-Tied Load (BTL) Supported
Fully differential Input
Shutdown Control Available
Surface-Mount Power Package
20-Pin TSSOP-P
General Description
G1431 is a stereo audio power amplifier in 20pin
TSSOP thermal pad package. It can drive 2.0W con-
tinuous RMS power into 4Ω load per channel in
Bridge-Tied Load (BTL) mode at 5V supply voltage. Its
THD is smaller than 1% under the above operation
condition. To simplify the audio system design in the
notebook application and to enlarge the driving power,
G1431 supports the Bridge-Tied Load (BTL) mode for
driving the speakers. For the low current consumption
applications, the SHDN mode is supported to disable
G1431 when it is idle. The current consumption can be
reduced to 150µA (typically).
Amplifier gain is internally configured and controlled by
two terminals (GAIN0, GAIN1). BTL gain settings of
6dB, 10dB, 15.6dB, 21.6dB are provided.
Applications
Stereo Power Amplifiers for Notebooks or
Desktop Computers
Multimedia Monitors
Stereo Power Amplifiers for Portable Audio
Systems
Ordering Information
ORDER
MARKING
NUMBER
G1431F2U
G1431
TEMP.
RANGE
PACKAGE
(Pb free)
-40°C to +85°C TSSOP-20 (FD)
Pin Configuration
G1431
GND
GAIN0
GAIN1
LOUT+
LIN-
PVDD
RIN+
LOUT-
LIN+
1
2
3
4
5
6
7
8
9
20
19
18
17
16
15
14
13
12
11
GND
SHUTDOWN
ROUT+
RIN-
VDD
PVDD
ROUT-
GND
NC
GND
Thermal
Pad
BYPASS 10
Top View
TSSOP-20
Bottom View
Ver: 1.3
Sep 23, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
1
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
