Global Mixed-mode Technology Inc.
G1432
2W Stereo Audio Amplifier
Features
Depop Circuitry Integrated
Output Power at 1% THD+N, VDD=5V
--1.8W/CH (typical) into a 4Ω Load
--1.2W/CH (typical) into a 8Ω Load
Maximum Output Power Clamping Circuitry
Integrated
Bridge-Tied Load (BTL)
Stereo Input MUX
Mute and Shutdown Control Available
Surface-Mount Power Package
24-Pin TSSOP-P & 24-Pin QFN Available
General Description
The G1432 is a stereo audio power amplifier in 24pin
TSSOP thermal pad package or 24pin QFN package.
It can drive 1.8W continuous 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. The G1432 can mute the
output when Mute is activated. For the low current
consumption applications, the SHDN mode is sup-
ported to disable the G1432 when it is idle. The cur-
rent consumption can be further reduced to below
5µA.
The G1432 also supports two input paths, that means
two different gain loops can be set in the same PCB
and choosing either one by setting
IN1
/IN2 pin. It en-
hances the hardware designing flexibility. The G1432
also supports an extra function -- the maximum output
power clamping function to protect the speakers from
burned-out.
Applications
Stereo Power Amplifiers for Notebooks or
Desktop Computers
Multimedia Monitors
Stereo Power Amplifiers for Portable Audio
Systems
Ordering Information
ORDER
MARKING
NUMBER
G1432F3U
G1432Q5U
G1432
G1432
TEMP.
RANGE
PACKAGE
(Pb free)
-40°C to +85°C TSSOP-24 (FD)
-40°C to +85°C QFN4X4-24
Note: F3:TSSOP-24 (FD) Q5:QFN4X4-24
U: Tape & Reel
Pin Configuration
RBYPBASS
RIN1
RIN2
RVDD
G1432
GND/HS
NC
LOUT+
LIN1
LIN2
LBYPASS
LVDD
SHUTDOWN
NC
1
2
3
4
5
6
7
8
9
24
23
22
21
20
19
18
17
16
15
14
13
GND/HS
VOL
ROUT+
RIN1
RIN2
RBYPASS
RVDD
GND
IN1/IN2
ROUT-
MUTE
GND/HS
ROUT+
VOL
GND/HS
19
20
21
22
23
24
17
16
15
14
GND
18
13
12
11
IN1/IN2
ROUT-
MUTE
GND/HS
GND/HS
NC
LOUT-
Thermal
Pad
GND/HS
NC
LOUT+
Thermal
Pad
10
9
8
7
LIN1
LBYPASS
GND/HS 12
Top View
TSSOP-24 (FD)
Bottom View
G1432 QFN4X4-24
Note: Recommend connecting the Thermal Pad to the GND for excellent power dissipation.
Ver: 1.1
Jun 21, 2006
TEL: 886-3-5788833
http://www.gmt.com.tw
1
SHUTDOWN
LVDD
LIN2
NC
LOUT- 10
NC 11
2
5
1
3
4
6
GMT [ GLOBAL MIXED-MODE TECHNOLOGY INC ]
