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 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. To simplify the audio system design in the notebook application, the G1422 supports the BridgeTied 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 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 19 18 17 16 15 14 13 12 HP-IN 20 HP-IN GND/HS +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
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Global Mixed-mode Technology Inc.
Absolute Maximum Ratings
Supply Voltage, VCC…………………..…...…….……...6V 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
G1422
Power Dissipation (1) TA ≤ 25°C………………………………………….2.7W TA ≤ 70°C………………………………………….1.7W TA ≤ 85°C………………….………………………1.4W Electrostatic Discharge, VESD Human body mode..………………….…-3000 to 3000(2)
Note:
(1) (2)
: Recommended PCB Layout : Human body model : C = 100pF, R = 1500Ω, 3 positive pulses plus 3 negative pulses
Electrical Characteristics
DC Electrical Characteristics, VDD = 5.0V, TA=+25°C, unless otherwise noted PARAMETER
Supply Current DC Differential Output Voltage IDD in Shutdown Headphone High Input Voltage Headphone Low Input Voltage
SYMBOL
IDD VO(DIFF) ISD VIH VIL VDD = 5V
CONDITION
Stereo BTL STEREO SE VDD = 5V,Gain = 2 VDD = 5V
MIN
--------4 ---
TYP
8.5 4 5 0.1 -----
MAX
15 8 50 2 --0.8
UNIT
mA mV µA V V
(AC Operation Characteristics, VDD = 5.0V, TA=+25°C, RL = 4Ω, unless otherwise noted) PARAMETER SYMBOL CONDITION
THD = 1%, BTL, RL = 4Ω THD = 1%, BTL, RL = 8Ω THD = 10%, BTL, RL = 4Ω Output power (each channel) see Note P(OUT) THD = 10%, BTL, RL = 8Ω THD = 1%, SE, RL = 4Ω THD = 1%, SE, RL = 8Ω THD = 10%, SE, RL = 4Ω THD = 10%, SE, RL L = 8Ω THD = 0.5%, SE, RL = 32Ω PO = 1.6W, BTL, RL = 4Ω Total harmonic distortion plus noise THD+N PO = 1W, BTL, RL = 8Ω PO = 75mW, SE, RL = 32Ω VI = 1V, RL = 10KΩ, G = 1, SE G = 1, THD = 1% RL = 4Ω, Open Load f = 120Hz f = 1kHz
MIN
---------------------------------------------
TYP
2 1.25 2.5 1.6 550 340 700 440 92 300 100 15 2.5 20 65 75 80 80 85 2 90 55
MAX
---------------------------------------------
UNIT
W
mW
m%
Maximum output power bandwidth Phase margin Power supply ripple rejection Channel-to-channel output separation Input separation BTL attenuation in SE mode Input impedance Signal-to-noise ratio Output noise voltage
BOM PSRR
kHz ° dB dB dB dB MΩ dB µV (rms)
ZI Vn PO = 500mW, BTL Output noise voltage
Note :Output power is measured at the output terminals of the IC at 1kHz.
Ver: 1.2 Jun 29, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Typical Characteristics
Table of Graphs
G1422
FIGURE
2,4,6,9,11,15,17 1,3,5,7,8,10,12,13,14,16,18 20 19 22,23 21 24 25,26 27,28 29,30,31,32
THD +N Total harmonic distortion plus noise Output noise voltage Vn Supply ripple rejection ratio Crosstalk Open loop response IDD PO PD Supply current Output power Power dissipation
vs Frequency vs Output Power vs Frequency vs Frequency vs Frequency vs Frequency Vs Supply Voltage vs Load Resistance Vs Load Resistance vs Output Power
Total Harmonic Distortion Plus Noise vs Output Power
10 5 10 5
Total Harmonic Distortion Plus Noise vs Frequency
20kHz
2 1 0.5 % 0.2 0.1 0.05
2 1
Po=1.8W
1kHz
%
0.5
0.2
20 Hz
0.02 0.01 3m
VDD=5V RL=3Ω BTL Av=-2V/V
20m 50m 100m W 200m 500m 1 2 3
0.1 0.05
0.02 0.01 20
VDD=5V RL=3Ω BTL Av=-2V/V
50 100 200 500 Hz 1k 2k 5k 10k 20k
5m
10m
Figure 1
Figure 2
Total Harmonic Distortion Plus Noise vs Output Power
10 5 10 5
Total Harmonic Distortion Plus Noise vs Frequency
Av=-4V/V Av=-2V/V
20kHz
2 1 0.5 % 0.2 0.1 0.05
2 1
1kHz
%
0.5
0.2
20 Hz
0.02 0.01 3m
VDD=5V RL=4Ω BTL Av=-2V/V
10m 20m 50m 100m W 200m 500m 1 2 3
0.1 0.05
Av=-1V/V
0.02 0.01 20
VDD=5V RL=4Ω BTL Po=2W
200 500 Hz 1k 2k 5k 10k 20k
5m
50
100
Figure 3
Figure 4
Ver: 1.2 Jun 29, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Total Harmonic Distortion Plus Noise vs Output Power
10 5 10
G1422
Total Harmonic Distortion Plus Noise vs Frequency
20kHz
2 1 0.5 % 0.2 0.1 0.05
VDD=5V RL=8Ω BTL Av=-2V/V
5
2 1 0.5
VDD=5V RL=8Ω BTL Po=1W
Av=-4V/V
1kHz
% 0.2 0.1
Av=-2V/V
20 Hz
0.05
0.02 0.01 2m
0.02 0.01 20
Av=-1V/V
50 100 200 500 Hz 1k 2k 5k 10k 20k
5m
10m
20m
50m W
100m
200m
500m
1
2
Figure 5
Figure 6
Total Harmonic Distortion Plus Noise vs Output Power
10 5 10
Total Harmonic Distortion Plus Noise vs Frequency
5
2 1 0.5 % 0.2 0.1 0.05
20kHz
VDD=5V RL=32Ω BTL Av=-2V/V
20kH
2 1 0.5 % 0.2
1kHz
1kHz
0.1 0.05
0.02 0.01 1m
20 Hz
2m 5m 10m 20m W 50m 100m 200m 500m 1
0.02 0.01 1m
VDD=3.3V RL=4Ω BTL Av=-2V/V
2m 5m 10m
20 Hz
20m W
50m
100m
200m
500m
1
Figure 7
Figure 8
Total Harmonic Distortion Plus Noise vs Frequency
10 5 10
Total Harmonic Distortion Plus Noise vs Output Power
5
2 1 0.5 % 0.2 0.1 0.05
VDD=3.3V RL=4Ω BTL Po=0.75W
Av=-4V/V
2 1 0.5
20kHz
Av=-2V/V
% 0.2 0.1 0.05
1kHz
0.02 0.01 20
Av=-1V/V
50 100 200 500 Hz 1k 2k 5k 10k 20k
0.02 0.01 1m
VDD=3.3V RL=8Ω BTL Av=-2V/V
2m 5m 10m
20 Hz
20m W
50m
100m
200m
500m
1
Figure 9
Figure 10
Ver: 1.2 Jun 29, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
G1422
Total Harmonic Distortion Plus Noise vs Output Power
Total Harmonic Distortion Plus Noise vs Frequency
10 5 10
2 1 0.5 % 0.2 0.1 0.05
VDD=3.3V RL=8Ω BTL Po=0.45W
5
2
20kHz
Av=-4V/V
%
1 0.5
VDD=5V RL=4Ω SE Av=-2V/V
0.2
1kHz
Av=-2V/V
0.1 0.05
0.02 0.01 20
Av=-1V/V
50 100 200 500 Hz 1k 2k 5k 10k 20k
0.02
100Hz
2m 5m 10m 20m W 50m 100m 200m 500m 1
0.01 1m
Figure 11
Figure 12
Total Harmonic Distortion Plus Noise vs Output Power
10 5 10
Total Harmonic Distortion Plus Noise vs Output Power
5
2 1 0.5 % 0.2 0.1 0.05
VDD=5V RL=8Ω SE Av=-2V/V 20kHz
%
2 1 0.5
VDD=5V RL=16Ω SE Av=-2V/V 20kHz
0.2
1kHz
0.1 0.05
20 Hz 1kHz
2m 5m 10m 20m W 50m 100m 200m 500m
0.02
100kHz
2m 5m 10m 20m W 50m 100m 200m 500m 1
0.02 0.01 1m
0.01 1m
Figure 13
Figure 14
Total Harmonic Distortion Plus Noise vs Frequency
10 5 10 5
Total Harmonic Distortion Plus Noise vs Output Power
VDD=5V RL=32Ω SE Av=-2V/V 20kHz
2 1 0.5 % 0.2 0.1 0.05
VDD=5V RL=16Ω SE Po=150mW Av=-4V/V
%
2 1 0.5
0.2 0.1 0.05
Av=-2V/V
1kHz
20 Hz
0.02 0.01 20
Av=-1V/V
50 100 200 500 Hz 1k 2k 5k 10k 20k
0.02 0.01 1m
2m
5m
10m
20m W
50m
100m
200m
500m
1
Figure 15
Figure 16
Ver: 1.2 Jun 29, 2005
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Total Harmonic Distortion Plus Noise vs Frequency
10 5 2 1 0.5 0.2 % 0.1 0.05 0.02 0.01 0 .005 0 .002 0 .001 20 50 100 200 50 0 Hz 1k 2k 5k 10k 20 k % 10
G1422
VDD=3.3V RL=32Ω SE A v=-2V/V
Total Harmonic Distortion Plus Noise vs Output Power
5 2 1
VDD=5V RL=32Ω SE Po=75mW
A v=-4V/V
0.5 0.2 0.1 0.05 0.02 0.01
20kHz
A v=-2V/V
20 Hz 1kHz
A v=-1V/V
0.005 0.002 0.001 1m 2m 5m 10 m W 2 0m 5 0m 100m
Figure 17
Figure 18
Supply Ripple Rejection Ratio vs Frequency
+0 -10 -20 -30 -40 d B -50 -60 -70 -80 -90 -100 20 V
Output Noise Voltage vs Frequency
100u 90u 80u 70u 60u 50u 40u
T
VDD=5V RL=4Ω CB=4.7µF Vripple=0.5Vpp
VDD=5V RL=4Ω BTL Mode 20kHz LP
30u
SE Mode
20u
VDD=5V RL=32Ω SE Mode BW