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G1420 Schematic ( PDF Datasheet ) - Global Mixed-mode Technology

Teilenummer G1420
Beschreibung 2W Stereo Audio Amplifier
Hersteller Global Mixed-mode Technology
Logo Global Mixed-mode Technology Logo 




Gesamt 20 Seiten
G1420 Datasheet, Funktion
Global Mixed-mode Technology Inc.
2W Stereo Audio Amplifier
G1420
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
„ Bridge-Tied Load (BTL), Single-Ended (SE)
„ Stereo Input MUX
„ Mute and Shutdown Control Available
„ Surface-Mount Power Package
24-Pin TSSOP-P
www.DataSheet4U.com
Applications
„ Stereo Power Amplifiers for Notebooks or
Desktop Computers
„ Multimedia Monitors
„ Stereo Power Amplifiers for Portable Audio
Systems
General Description
G1420 is a stereo audio power amplifier in 24pin
TSSOP thermal pad package. It can drive 1.8W 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, G1420 supports the Bridge-Tied
Load (BTL) mode for driving the speakers, Single-End
(SE) mode for driving the headphone. G1420 can
mute the output when Mute-In is activated. For the low
current consumption applications, the SHDN mode is
supported to disable G1420 when it is idle. The current
consumption can be further reduced to below 5µA.
G1420 also supports two input paths, that means two
different gain loops can be set in the same PCB and
choosing either one by setting HP/ LINE pin. It en-
hances the hardware designing flexibility.
Ordering Information
ORDER
NUMBER
G1420F31U
Note: F3: TSSOP-24 (FD)
U: Tape & Reel
ORDER NUMBER
(Pb free)
G1420F31Uf
Pin Configuration
TEMP.
RANGE
-40°C to +85°C
PACKAGE
TSSOP-24 (FD)
GND/HS 1
TJ 2
LOUT+ 3
LLINEIN 4
LHPIN 5
LBYPASS 6
LVDD 7
SHUTDOWN 8
MUTE OUT 9
LOUT- 10
MUTE IN 11
GND/HS 12
G1420
24 GND/HS
23 NC
22 ROUT+
21 RLINEIN
20 RHPIN
19 RBYPASS
18 RVDD
17 NC
16 HP/LINE
15 ROUT-
14 SE/BTL
13 GND/HS
Thermal
Pad
Top View
TSSOP-24 (FD)
Bottom View
Note: Recommend connecting the Thermal Pad to the GND for excellent power dissipation.
14
Ver: 1.5
Aug 04, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
1






G1420 Datasheet, Funktion
Global Mixed-mode Technology Inc.
G1420
Total Harmonic Distortion Plus
Noise vs Output Frequency
10
5 VDD=3.3V
RL=4Ω
2 BTL
1 Po=0.65W
Av=-4V/V
Av=-2V/V
0.5
%
0.2
0.1
www.DataSheet40U.05.com
Av=-1V/V
0 .02
0 .01
20
50 10 0 2 00
5 00
Hz
1k
2k
Figure 11
5k 10k 20k
10
5
2
1
0.5
%
0.2
0.1
0 .05
Total Harmonic Distortion Plus
Noise vs Output Frequency
VDD=3.3V
RL=4Ω
BTL
Av=-2V/V
Po=0.7W
Po=0.1W
Po=0.35W
0 .02
0 .01
20
50 100 2 00
5 00
Hz
1k
2k
Figure 12
5k 10k 20k
Total Harmonic Distortion Plus
Noise vs Output Power
10
5 VDD=3.3V
RL=8Ω
2
20kHz
BTL
1
0.5
%
0.2
1kHz
0.1
0 .05
20Hz
0 .02
0 .01
1m
2m
5m 10m 20 m
50 m 10 0m 2 00m
W
500 m 1
Figure 13
10
5
2
1
0.5
%
0.2
0.1
0 . 05
Total Harmonic Distortion Plus
Noise vs Output Frequency
VDD=3.3V
RL=8Ω
BTL
Po=0.4W
Av=-4V/V
Av=-2V/V
Av=-1V/V
0 . 02
0 . 01
20
50 10 0 200
5 00
Hz
1k
2k
5 k 10 k 20k
Figure 14
Total Harmonic Distortion Plus
Noise vs Output Frequency
10
5 VDD=3.3V
RL=8Ω
2 BTL
Av=-2V/V
1
Po=0.4W
0.5
%
0.2
Po=0.1W
0.1
0 .05
Po=0.25W
0 .02
0 .01
20
50 10 0 2 00
5 00
Hz
1k
2k
Figure 15
5k 10k 20k
Ver: 1.5
Aug 04, 2005
Total Harmonic Distortion Plus
Noise vs Output Power
10
5 VDD=5V
RL=4Ω
2 SE
1
20kHz
0.5
%
0.2
0.1
1kHz
0 . 05
100Hz
0 . 02
0 . 01
1m
2m
5m 1 0m 20m
50 m 10 0m 2 00 m
W
Figure 16
500 m 1
TEL: 886-3-5788833
http://www.gmt.com.tw
6

6 Page









G1420 pdf, datenblatt
Global Mixed-mode Technology Inc.
G1420
Output Power vs Supply Voltage
2.5
THD+N=1%
2 BTL
RL=4Ω
Each Channel
1.5
1
0.5
www.DataSheet4U.com
0
2.5
RL=3Ω
RL=8Ω
3.5 4.5
Supply Voltage (V)
Figure 47
5.5
6.5
Output Power vs Supply Voltage
0.7
0.6 THD+N=1%
SE
0.5 Each Channel
0.4
0.3 RL=4Ω
RL=8Ω
0.2 RL=32Ω
0.1
0
2.5
3.5 4.5 5.5
Supply Voltage(V)
6.5
Figure 48
Output Power vs Load Resistance
2
1.8 VDD=5V
1.6
THD+N=1%
BTL
Each Channel
1.4
1.2
1 VDD=3.3V
0.8
0.6
0.4
0.2
0
0 4 8 12 16 20 24 28
Load Resistance()
Figure 49
32
Output Power vs Load Resistance
0.7
0.6 VDD=5V
0.5
THD+N=1%
SE
Each Channel
0.4
0.3
0.2
0.1 VDD=3.3V
0
0 4 8 12 16 20 24 28 32
Load Resistance()
Figure 50
Power Dissipation vs Output Power
1.8
1.6 RL=3Ω
1.4
1.2
1 RL=4Ω
0.8
VDD=5V
0.6 BTL
0.4
Each Channel
RL=8Ω
0.2
0
0 0.5 1 1.5 2 2.5
Po-Output Pow er(W)
Figure 51
Power Dissipation vs Output Power
0.8
0.7 RL=3Ω
0.6
0.5 RL=4Ω
0.4
0.3 VDD=3.3V
0.2
RL=8Ω
BTL
Each Channel
0.1
0
0 0.25 0.5 0.75 1
Output Pow er(W)
Figure 52
Ver: 1.5
Aug 04, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
12

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