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PDF G1428 Data sheet ( Hoja de datos )
| Número de pieza | G1428 | |
| Descripción | 2W Stereo Audio Amplifier | |
| Fabricantes | Global Mixed-mode Technology | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de G1428 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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Global Mixed-mode Technology Inc.
2W Stereo Audio Amplifier
2X\6X\12X\24X Selectable Gain Settings
G1428
Features
Internal Gain Control, Which Eliminates Exter-
nal Gain-Setting Resistors
Depop Circuitry Integrated
Output Power at 1% THD+N, VDD=5V
--2.0W/CH (typical) into a 4Ω Load
--1.2W/CH (typical) into a 8Ω Load
Bridge-Tied Load (BTL), Single-Ended (SE)
www.DataSheet4U.cSotmereo Input MUX
PC-Beep Input
Fully differential Input
Shutdown Control Available
Surface-Mount Power Package
24-Pin TSSOP-P
Applications
Stereo Power Amplifiers for Notebooks or
Desktop Computers
Multimedia Monitors
Stereo Power Amplifiers for Portable Audio
Systems
General Description
G1428 is a stereo audio power amplifier in 24pin
TSSOP thermal pad package. It can drive 2.0W 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, G1428 supports the Bridge-Tied
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 G1428 when it is idle. The current
consumption can be reduced to 160µA (typically).
Amplifier gain is internally configured and controlled by
two terminals (GAIN0, GAIN1). BTL gain settings of 2,
6, 12, 24V/V are provided, while SE gain is always
configured as 1V/V for headphone driving. G1428 also
supports two input paths, that means two different
amplitude AC signals can be applied and chosen by
setting HP/ LINE pin. It enhances the hardware de-
signing flexibility.
Ordering Information
ORDER
NUMBER
G1428F31U
Note: U: Tape & Reel
(FD): Thermal Pad
ORDER NUMBER
(Pb free)
G1428F31Uf
Pin Configuration
MARKING
G1428
TEMP.
RANGE
-40°C to +85°C
PACKAGE
TSSOP-24 (FD)
GND/HS 1
GAIN0 2
GAIN1 3
LOUT+ 4
LLINEIN 5
LPHIN 6
PVDD 7
RIN 8
LOUT- 9
LIN 10
BYPASS 11
GND/HS 12
Top View
TSSOP-24
24 GND/HS
23 RLINEIN
22 SHUTDOWN
21 ROUT+
20 RHPIN
19 VDD
18 PVDD
17 HP/LINE
16 ROUT-
15 SE/BTL
14 PC-BEEP
13 GND/HS
Ver: 1.2
Mar 31, 2005
1
Thermal
Pad
14
Bottom View
TEL: 886-3-5788833
http://www.gmt.com.tw
1 page  
Global Mixed-mode Technology Inc.
G1428
Toal Harmonic Distortion Plus
Noise vs Output Power
10
5 15kHz
2
1 1kHz
0.5
%
0.2
0.1
www.DataSheet4U.com0.05
0.02
VDD=5V
RL=4Ω
BTL,Av=-12V/V
20Hz
0.01
3m 5m 10m 20m
50 m
100m
W
200 m
Figure 11
50 0m
1
23
Toal Harmonic Distortion Plus
Noise vs Output Power
10
5 15kHz
2
1 1kHz
0.5
%
0.2
0.1
0.05
0.02
VDD=5V
RL=4Ω
BTL,Av=-24V/V
20Hz
0.01
3m 5m 10m 20m
50 m
100m
W
200 m
Figure 12
50 0m
1
23
Toal Harmonic Distortion Plus
Noise vs Frequency
10
5 VDD=5V
RL=8Ω
2 BTL,Av=-2V/V
1
0.5
%
0.2
0.1
0.05
Po=1W
Po=0.25W
0.02 Po=0.5W
0.01
20
50 100 20 0
5 00
Hz
1k
2k
Figure 13
5k 10k 20 k
10
5
2
1
0.5
%
0.2
0.1
0.05
Toal Harmonic Distortion Plus
Noise vs Frequency
VDD=5V
RL=8Ω
BTL
Po=1W
Av=-24V/V
Av=-12V/V
Av=-2V/V
0.02
0.01
20
Av=-6V/V
50 100 20 0
5 00
Hz
1k
2k
Figure 14
5k 10k 20 k
Toal Harmonic Distortion Plus
Noise vs Output Power
10
5
2 15kHz
1
VDD=5V
RL=8Ω
BTL,Av=-2V/V
0.5
%
0.2
1kHz
0.1
0.05
20Hz
0.02
0.01
3m 5m 10m 20m
50 m
100m
W
200 m
Figure 15
50 0m
1
23
Toal Harmonic Distortion Plus
Noise vs Output Power
10
5 15kHz
2
VDD=5V
RL=8Ω
BTL,Av=-6V/V
1
0.5
%
0.2
1kHz
0.1
0.05 20Hz
0.02
0.01
3m 5m 10m 20m
50 m
100m
W
200 m
Figure 16
50 0m
1
23
Ver: 1.2
Mar 31, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
5
5 Page 
Global Mixed-mode Technology Inc.
Application Circuit
G1428
Right Linein Negative
Differential Input 1µF
1µF
Right Hpin Negative
Differential Input
Right Hpin/Linein Positive
Differential Input 1µF
www.DataSheet4U.com
1µF
PC-BEEP Input Signal
2.2µF
Left Linein Negative
Differential Input 1µF
Left Hpin Negative 1µF
Differential Input
Left Hpin/Linein Positive
Differential Input
1µF
23 RLINEIN
20 RHPIN
Right
MUX
8 RIN
14 PC-Beep PC-Beep
11 BYPASS Depop
Circuitry
2 GAIN0
3 GAIN1
15
SE/BTL
Gain/MUX
Control
17 HP/LINE
5 LLINEIN
6 LHPIN
Left
MUX
10 LIN
ROUT+ 21
ROUT- 16
VDD
220µF
1K
PVDD
Power
VDD
Management SHUTDOWN
1,12,13,24
GND
7,18 VDD
19
22 1µF 10µF
Note
100K
LOUT+ 4
1K
220µF
LOUT- 3
0.1µF
Application Circuit Using Differential Inputs
Note: 1µF ceramic capacitor should be placed as close as possible to the IC to filter the higher-frequency noise.
Ver: 1.2
Mar 31, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet G1428.PDF ] | |
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