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G1427 Datasheet, PDF (1/16 Pages) Global Mixed-mode Technology Inc – 2W Stereo Audio Amplifier | |||
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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)
 Stereo 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 1
GAIN0 2
GAIN1 3
LOUT+ 4
LLINEIN 5
LPHIN 6
PVDD 7
RIN 8
LOUT- 9
LIN 10
BYPASS 11
GND/HS 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
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