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부품번호 | G1428 기능 |
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기능 | 2W Stereo Audio Amplifier | ||
제조업체 | Global Mixed-mode Technology | ||
로고 | |||
전체 16 페이지수
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
Global Mixed-mode Technology Inc.
G1428
Toal Harmonic Distortion Plus
Noise vs Output Power
10
5 15kHz
2
1
0.5
%
0.2
1kHz
0.1
www.DataSheet4U.com0.05
0.02
VDD=5V
RL=3Ω
BTL,Av=-12V/V
20Hz
0.01
3m 5m 10m 20m
50 m
100m
W
200 m
Figure 5
50 0m
1
23
Toal Harmonic Distortion Plus
Noise vs Output Power
10
5
1kHz
2
15kHz
1
0.5
%
0.2
20Hz
0.1 VDD=5V
0.05 RL=3Ω
BTL,Av=-24V/V
0.02
0.01
3m 5m
10m 20m
50 m
100m
W
200 m
Figure 6
50 0m
1
23
Toal Harmonic Distortion Plus
Noise vs Frequency
10
5 Av=-24V/V
2
1
0.5
%
0.2
0.1
0.05
Av=-12V/V
0.02 Av=-2V/V
Av=-6V/V
VDD=5V
RL=4Ω
BTL
Po=1.75W
0.01
20
50 100 200
5 00
Hz
1k
2k
5k 10k 20 k
Figure 7
10
5
2
1
0.5
%
0.2
0.1
0.05
Toal Harmonic Distortion Plus
Noise vs Frequency
VDD=5V
RL=4Ω
BTL,Av=-2V/V
Po=1.5W
Po=0.25W
0.02
0.01
20
Po=1W
50 100 20 0
5 00
Hz
1k
2k
Figure 8
5k 10k 20 k
Toal Harmonic Distortion Plus
Noise vs Output Power
10
5 15kHz
2
VDD=5V
RL=4Ω
BTL,Av=-2V/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 9
50 0m
1
23
Ver: 1.2
Mar 31, 2005
Toal Harmonic Distortion Plus
Noise vs Output Power
10
5
15kHz
2
1
0.5
%
0.2
1kHz
0.1
VDD=5V
0.05 RL=4Ω
BTL,Av=-6V/V
0.02
20Hz
0.01
3m 5m
10m 20m
50 m
100m
W
200 m
Figure 10
50 0m
1
23
TEL: 886-3-5788833
http://www.gmt.com.tw
4
4페이지 Global Mixed-mode Technology Inc.
G1428
Supply Ripple Rejection Ratio
vs Frequency
+0T T
-10
-20
-30
TT
VDD=5V
RL=8Ω
Cb=1µF
BTL
T TT
-40
d
B
-50
-60
Av=-24V/V
-70
www.DataSheet4U.com
-80
Av=-2V/V
-90
-100
20
50 100 200
5 00
Hz
1k
2k
Figure 23
5 k 10k 20 k
+0
-10
-20
-30
-40
d
B
-50
-60
-70
-80
-90
-100
20
Supply Ripple Rejection Ratio
vs Frequency
VDD=5V
RL=8Ω
Cb=1µF
SE
50 100 200
5 00
Hz
1k
2k
Figure 24
5 k 10k 20 k
-20 T
-25
-30
-35
-40
-45
-50
-55
d
B
-60
-65
-70
-75
-80
-85
-90
-95
-100
20
Channel Separation
VDD=5V
Po=1W
RL=8Ω
BTL,Av=-2V/V
L TO R
R TO L
50 100 200
5 00
Hz
1k
2k
Figure 25
5k
10k 20 k
5 00u
4 00u
3 00u
2 00u
1 00u
V 70u
60u
50u
40u
30u
20u
Output Noise vs Frequency
VDD=5V
RL=4Ω
BTL,Av=-2V/V
A-Weighted filter
10u
20
50 100 200
5 00
Hz
1k
2k
5 k 10k 20 k
Figure 27
+0
-10
-20
-30
-40
-50
d
B
-60
-70
-80
-90
-100
-110
-120
20
Channel Separation
VDD=5V
Vo=1Vrms
RL=10kΩ
SE,Av=-1V/V
L TO R
R TO L
50 100 200
5 00
Hz
1k
2k
Figure 26
5 k 10k 20 k
Output Power vs Load Resistance
2.5
2 VDD=5V
THD+N=1%
BTL
1.5 Each Channel
1
0.5
0
0 10 20 30 40
Load Resistance(Ω)
Figure 28
Ver: 1.2
Mar 31, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
7
7페이지 | |||
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DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |