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Global Mixed-mode Technology Inc.
2W Stereo Audio Amplifier
G1432
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
www.DataSheet„4U.cSoumrface-Mount Power Package
24-Pin TSSOP-P & 24-Pin QFN Available
Applications
„ Stereo Power Amplifiers for Notebooks or
Desktop Computers
„ Multimedia Monitors
„ Stereo Power Amplifiers for Portable Audio
Systems
Pin Configuration
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.
Ordering Information
ORDER
NUMBER
MARKING
TEMP.
RANGE
PACKAGE
(Pb free)
G1432F3U G1432 -40°C to +85°C TSSOP-24 (FD)
G1432Q5U G1432 -40°C to +85°C QFN4X4-24
Note: F3:TSSOP-24 (FD) Q5:QFN4X4-24
U: Tape & Reel
G1432
GND/HS 1
NC 2
LOUT+ 3
LIN1 4
LIN2 5
LBYPASS 6
LVDD 7
SHUTDOWN 8
NC 9
LOUT- 10
NC 11
GND/HS 12
24 GND/HS
23 VOL
22 ROUT+
21 RIN1
20 RIN2
19 RBYPASS
18 RVDD
17 GND
16 IN1/IN2
15 ROUT-
14 MUTE
13 GND/HS
Top View
TSSOP-24 (FD)
Thermal
Pad
Bottom View
ROUT+ 19
VOL 20
GND/HS 21
GND/HS 22
NC 23
LOUT+ 24
Thermal
Pad
12 ROUT-
11 MUTE
10 GND/HS
9 GND/HS
8 NC
7 LOUT-
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

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Global Mixed-mode Technology Inc.
G1432
Absolute Maximum Ratings
Supply Voltage, VDD . . . . . . . . . . . . . . . . . . . . . . . . .6V
Input Voltage, VI . . . . . . . . . . . . . . . -0.3V to VDD+0.3V
Operating Ambient Temperature Range
TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40°C to +85°C
Maximum Junction Temperature,
TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150°C
Storage Temperature Range,
TSTG . . . . . . . . . . . . . . . . . . . . . . . . . . .-65°C to+150°C
Reflow Temperature (soldering, 10sec) . . . . . . 260°C
Power Dissipation (1)
TSSOP-24 (FD)
TA 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.7W
TA 70°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.7W
TA 85°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.4W
Electrostatic Discharge, VESD
Human body mode . . . . . . . . . . . . . . .-3000 to 3000V(2)
Note:
(1) : Recommended PCB Layout.
www.DataSheet(42)U: .Hcuomman body model : C = 100pF, R = 1500Ω, 3 positive pulses plus 3 negative pulses
Electrical Characteristics
DC Electrical Characteristics, TA=+25°C
PARAMETER
Supply Current in Mute Mode
DC Differential Output Voltage
IDD in Shutdown
SYMBOL
IDD(MUTE)
VO(DIFF)
ISD
CONDITION
VDD =3.3V
Stereo BTL
VDD = 5V
Stereo BTL
VDD = 5V,Gain = 2
VDD = 5V
MIN
---
---
---
---
TYP
7
8
5
2
MAX
13
16
50
5
UNIT
mA
mV
µA
(AC Operation Characteristics, VDD = 5.0V, TA=+25°C, RL = 4Ω, unless otherwise noted)
PARAMETER
Output power (each channel) see Note
Total harmonic distortion plus noise
Maximum output power bandwidth
Phase margin
Power supply ripple rejection
Mute attenuation
Channel-to-channel output separation
SYMBOL
P(OUT)
THD+N
BOM
PSRR
CONDITION
THD = 1%, BTL, RL = 4Ω
THD = 1%, BTL, RL = 8Ω
THD = 10%, BTL, RL = 4Ω
THD = 10%, BTL, RL = 8Ω
PO = 1.6W, BTL, RL = 4Ω
PO = 1W, BTL, RL = 8Ω
VI = 1V, RL = 10KΩ, G = 1
G = 1, THD =1%
RL = 4Ω, Open Load
f = 120Hz
f = 1kHz
IN1/IN2 input separation
Input impedance
ZI
Signal-to-noise ratio
PO = 500mW, BTL
Output noise voltage
Vn Output noise voltage
Note :Output power is measured at the output terminals of the IC at 1kHz.
MIN
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
TYP
1.8
1.2
2
1.4
500
150
10
20
60
75
85
82
80
2
90
55
MAX
---
---
---
---
---
---
---
---
---
---
---
---
---
UNIT
W
m%
kHz
°
dB
dB
dB
dB
--- MΩ
--- dB
--- µV (rms)
Ver: 1.1
Jun 21, 2006
TEL: 886-3-5788833
http://www.gmt.com.tw
2

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Global Mixed-mode Technology Inc.
G1432
(AC Operation Characteristics, VDD = 3.3V, TA=+25°C, RL = 4Ω, unless otherwise noted)
PARAMETER
SYMBOL
CONDITION
Output power (each channel) see Note
Total harmonic distortion plus noise
Maximum output power bandwidth
Phase margin
Power supply ripple rejection
www.DataSheet4U.com
Mute attenuation
P(OUT)
THD+N
BOM
PSRR
THD = 1%, BTL, RL = 4Ω
THD = 1%, BTL, RL = 8Ω
THD = 10%, BTL, RL = 4Ω
THD = 10%, BTL, RL = 8Ω
PO = 0.7W, BTL, RL = 4Ω
PO = 0.45W, BTL, RL = 8Ω
VI = 1V, RL = 10KΩ, G = 1
G = 1, THD 1%
RL = 4Ω, Open Load
f = 120Hz
Channel-to-channel output separation
f = 1kHz
IN1/IN2 input separation
Input impedance
ZI
Signal-to-noise ratio
Output noise voltage
PO = 500mW, BTL
Vn Output noise voltage
Note : Output power is measured at the output terminals of the IC at 1kHz.
MIN
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
---
TYP
0.8
0.5
1
0.6
270
100
10
20
60
75
85
80
80
2
90
55
MAX UNIT
---
--- W
---
---
---
--- m%
---
--- kHz
--- °
--- dB
--- dB
--- dB
--- dB
--- MΩ
--- dB
--- µV (rms)
Ver: 1.1
Jun 21, 2006
TEL: 886-3-5788833
http://www.gmt.com.tw
3