Global Mixed-mode Technology Inc.
G1422
2W Stereo Audio Amplifier
Features
Depop Circuitry Integrated
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
General Description
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.
Applications
Stereo Power Amplifiers for Notebooks or
Desktop Computers
Multimedia Monitors
Stereo Power Amplifiers for Portable Audio
Systems
Ordering Information
ORDER
NUMBER
G1422F2U
Note:F2: TSSOP-20 (FD)
U: Tape & Reel
ORDER NUMBER
(Pb free)
G1422F2Uf
MARKING
G1422
TEMP.
RANGE
-40°C to +85°C
PACKAGE
TSSOP-20 (FD)
Pin Configuration
G1422
SHUTDOWN
GND/HS
+OUTA
VDD
-OUTA
-INA
GND/HS
+INA
GND/HS
1
2
3
4
5
6
7
8
9
20 HP-IN
19 GND/HS
18
17
16
15
14
13
12
+OUTB
VDD
-OUTB
-INB
BYPASS
+INB
GND/HS
Thermal
Pad
GND/HS 10
11 GND/HS
Top View
TSSOP-20 (FD)
Bottom View
Note: Recommend connecting the Thermal Pad to the GND for excellent power dissipation.
Ver: 1.2
Jun 29, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
1
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
