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G1427 Datasheet

2W Stereo Audio Amplifier

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G1427 pdf
Global Mixed-mode Technology Inc.
2W Stereo Audio Amplifier
6dB\10dB\15.6dB\21.6dB Selectable Gain Settings
G1427
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)
www.DataSheet„4U.Scotmereo Input MUX
„ PC-Beep Input
„ Fully differential Input
„ Shutdown Control Available
„ Surface-Mount Power Package
24-Pin TSSOP-P
Applications
„ Stereo Power Amplifiers for Notebooks or
Desktop Computers
„ Multimedia Monitors
„ Stereo Power Amplifiers for Portable Audio
Systems
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.
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
GND/HS
GAIN0
GAIN1
LOUT+
LLINEIN
LPHIN
PVDD
RIN
LOUT-
LIN
BYPASS
GND/HS
1
2
3
4
5
6
7
8
9
10
11
12
G1427
Top View
TSSOP-24
24 GND/HS
23 RLINEIN
22 SHUTDOWN
21 ROUT+
20 RHPIN
19 VDD
18 PVDD
17 HP/LINE
16 ROUT-
15 SE/BTL
14 PC-BEEP
13 GND/HS
Ver: 1.3
Sep 23, 2005
1
Thermal
Pad
Bottom View
TEL: 886-3-5788833
http://www.gmt.com.tw
Global Mixed-mode Technology
Global Mixed-mode Technology



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