G1422
Global Mixed-mode Technology Inc.
2W Stereo Audio Amplifier
Features
General Description
Depop Circuitry Integrated
The G1422 is a stereo audio power amplifier in 20pin
TSSOP thermal pad package. It can drive 2W 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, the G1422 supports the Bridge-
Tied Load (BTL) mode for driving the speakers, Sin-
gle-End (SE) mode for driving the headphone. For the
low current consumption applications, the SHDN mode
is supported to disable the G1422 when it is idle. The
current consumption can be further reduced to below
2µA.
Output Power at 1% THD+N, VDD=5V
--2W/CH (typical) into a 4Ω Load
--1.2W/CH (typical) into a 8Ω Load
Bridge-Tied Load (BTL), Single-Ended (SE)
Shutdown Control Available
Thermal protection
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
Ordering Information
ORDER
NUMBER
G1422F2U
ORDER NUMBER
TEMP.
RANGE
MARKING
G1422
PACKAGE
(Pb free)
G1422F2Uf
-40°C to +85°C
TSSOP-20 (FD)
Note:F2: TSSOP-20 (FD)
U: Tape & Reel
Pin Configuration
G1422
SHUTDOWN
GND/HS
1
2
3
4
5
6
HP-IN
20
19
18
GND/HS
+OUTB
+OUTA
VDD
-OUTA
-INA
17 VDD
-OUTB
16
15
Thermal
-INB
Pad
GND/HS
BYPASS
+INB
14
13
12
7
8
9
+INA
GND/HS
GND/HS
GND/HS
GND/HS
10
11
Top View
Bottom View
TSSOP-20 (FD)
Note: Recommend connecting the Thermal Pad to the GND for excellent power dissipation.
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.2
Jun 29, 2005
1