Global Mixed-mode Technology Inc.
G1427
2W Stereo Audio Amplifier
6dB\10dB\15.6dB\21.6dB Selectable Gain Settings
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), Single-Ended (SE)
Stereo Input MUX
PC-Beep Input
Fully differential Input
Shutdown Control Available
Surface-Mount Power Package
24-Pin TSSOP-P
General Description
G1427 is a stereo audio power amplifier in 24pin
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, G1427 supports the Bridge-Tied
Load (BTL) mode for driving the speakers, Single-End
(SE) mode for driving the headphone. For the low
current consumption applications, the SHDN mode is
supported to disable G1427 when it is idle. The current
consumption can be reduced to 160µA (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, while SE
gain is always configured as 4.1dB (inverting) for
headphone driving. G1427 also supports two input
paths, that means two different amplitude AC signals
can be applied and chosen by setting HP/
LINE
pin. It
enhances the hardware designing flexibility.
Applications
Stereo Power Amplifiers for Notebooks or
Desktop Computers
Multimedia Monitors
Stereo Power Amplifiers for Portable Audio
Systems
Ordering Information
ORDER
NUMBER
G1427F31U
Note: U:Tape & Reel
(FD): Thermal Pad
ORDER NUMBER
(Pb free)
G1427F31Uf
TEMP.
RANGE
-40°C to +85°C
PACKAGE
TSSOP-24 (FD)
Pin Configuration
G1427
GND/HS
GAIN0
GAIN1
LOUT+
LLINEIN
LPHIN
PVDD
RIN
LOUT-
LIN
BYPASS
1
2
3
4
5
6
7
8
9
10
11
24
23
22
21
20
19
18
17
16
15
14
13
GND/HS
RLINEIN
SHUTDOWN
ROUT+
RHPIN
VDD
PVDD
HP/LINE
ROUT-
SE/BTL
PC-BEEP
GND/HS
Thermal
Pad
GND/HS 12
Top View
TSSOP-24
Bottom View
Ver: 1.3
Sep 23, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
1
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
