G1431 Datasheet, PDF (1/13 Pages) Global Mixed-mode Technology Inc – 2W Stereo Audio Amplifier

Global Mixed-mode Technology Inc.
2W Stereo Audio Amplifier
G1431
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
Applications
„ Stereo Power Amplifiers for Notebooks or
Desktop Computers
„ Multimedia Monitors
„ Stereo Power Amplifiers for Portable Audio
Systems
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.
Ordering Information
ORDER
NUMBER
MARKING
TEMP.
RANGE
PACKAGE
(Pb free)
G1431F2U G1431 -40°C to +85°C TSSOP-20 (FD)
Pin Configuration
GND 1
GAIN0 2
GAIN1 3
LOUT+ 4
LIN- 5
PVDD 6
RIN+ 7
LOUT- 8
LIN+ 9
BYPASS 10
G1431
Top View
TSSOP-20
20 GND
19 SHUTDOWN
18 ROUT+
17 RIN-
16 VDD
15 PVDD
14 ROUT-
13 GND
12 NC
11 GND
Thermal
Pad
Bottom View
Ver: 1.3
Sep 23, 2005
TEL: [phone]
http://www.gmt.com.tw
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