G1428F31UF
| Model | G1428F31UF |
| Description | 2W Stereo Audio Amplifier |
| PDF file | Total 16 pages (File size: 339K) |
| Chip Manufacturer | GMT |
Global Mixed-mode Technology Inc.
G1428
2W Stereo Audio Amplifier
2X\6X\12X\24X 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
G1428 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, G1428 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 G1428 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 2,
6, 12, 24V/V are provided, while SE gain is always
configured as 1V/V for headphone driving. G1428 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 de-
signing flexibility.
Applications
Stereo Power Amplifiers for Notebooks or
Desktop Computers
Multimedia Monitors
Stereo Power Amplifiers for Portable Audio
Systems
Ordering Information
ORDER
NUMBER
G1428F31U
Note: U: Tape & Reel
(FD): Thermal Pad
ORDER NUMBER
(Pb free)
G1428F31Uf
MARKING
G1428
TEMP.
RANGE
-40°C to +85°C
PACKAGE
TSSOP-24 (FD)
Pin Configuration
GND/HS
GAIN0
GAIN1
LOUT+
LLINEIN
LPHIN
PVDD
RIN
LOUT-
1
2
3
4
5
6
7
8
9
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
14
Thermal
Pad
LIN 10
BYPASS 11
GND/HS 12
Top View
TSSOP-24
Bottom View
Ver: 1.2
Mar 31, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
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