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Электронный компонент: G1421F

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Ver: 1.6
Aug 04, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
1
G1421
Global Mixed-mode Technology Inc.
2W Stereo Audio Amplifier with No Headphone
Coupling Capacitor Function
Features
Depop Circuitry Integrated
Output Power at 1% THD+N, VDD=5V
--1.8W/CH (typical) into a 4
Load
--1.2W/CH (typical) into a 8
Load
Eliminates Headphone Amplifier Output Cou-
pling Capacitors
Maximum Output Power Clamping Circuitry
Integrated
Bridge-Tied Load (BTL), Single-Ended (SE),
and Stereo Headphone Amplifier (HP-IN) modes
Supported
Stereo Input MUX
Mute and 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
G1421 is a stereo audio power amplifier in 24pin
TSSOP thermal pad package. It can drive 1.8W con-
tinuous RMS power into 4
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, G1421 supports the Bridge-Tied
Load (BTL) mode for driving the speakers, Single-End
(SE) mode for driving the headphone. In the HP-IN
mode, it can support a DC value to the phone-jacket
and drive the headphone without the audio amplifier
outputs coupling capacitors. G1421 can mute the out-
put when Mute-In is activated. For the low current
consumption applications, the SHDN mode is sup-
ported to disable G1421 when it is idle. The current
consumption can be further reduced to below 5A.
G1421 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. G1421 also
supports an extra function -- the maximum output
power clamping function to protect the speakers or
headphones from burned-out.
Ordering Information
ORDER
NUMBER
ORDER NUMBER
(Pb free)
TEMP.
RANGE
PACKAGE
G1421
G1421f
-40C to +85C
TSSOP-24 (FD)
Note: U: Tape & Reel
(FD): Thermal Pad

Pin Configuration

ROUT+
RLINEIN
RHPIN
RBYPASS
RVDD
HP-IN
HP/LINE
ROUT-
SE/BTL
GND/HS
LOUT+
LLINEIN
LHPIN
LBYPASS
LVDD
SHUTDOWN
MUTE OUT
LOUT-
MUTE IN
G1421
GND/HS
TSSOP-24 (FD)
13
24
23
22
21
20
19
18
17
16
15
5
6
7
8
9
10
11
12
1
4
3
2
14
TJ
VOL
14
Thermal
Pad
Top View
Bottom View
GND/HS
GND/HS
Note: Recommend connecting the Thermal Pad to the GND for excellent power dissipation.
ROUT+
RLINEIN
RHPIN
RBYPASS
RVDD
HP-IN
HP/LINE
ROUT-
SE/BTL
GND/HS
LOUT+
LLINEIN
LHPIN
LBYPASS
LVDD
SHUTDOWN
MUTE OUT
LOUT-
MUTE IN
G1421
GND/HS
TSSOP-24 (FD)
13
24
23
22
21
20
19
18
17
16
15
5
6
7
8
9
10
11
12
1
4
3
2
14
TJ
VOL
14
Thermal
Pad
Top View
Bottom View
GND/HS
GND/HS
Note: Recommend connecting the Thermal Pad to the GND for excellent power dissipation.
Ver: 1.6
Aug 04, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
2
G1421
Global Mixed-mode Technology Inc.
Absolute Maximum Ratings
Supply Voltage, V
DD
............................................6V
Input Voltage, V
I
...........................-0.3V to V
DD
+0.3V
Operating Ambient Temperature Range
T
A
..................................................-40C to +85C
Maximum Junction Temperature, T
J
.................150C
Storage Temperature Range, T
STG...
....-65C to+150C
Reflow Temperature (soldering, 10sec)............260C
Power Dissipation
(1)
T
A
25C..................................................2.7W
T
A
70C..................................................1.7W
T
A
85C..................................................1.4W
Electrostatic Discharge, V
ESD
Human body mode
Lout- pin.........................................-8000 to 8000V
Other pins.......................................-3000 to 3000
(2)
Note:
(1)
: Recommended PCB Layout.
(2)
: Human body model : C = 100pF, R = 1500
, 3 positive pulses plus 3 negative pulses
Electrical Characteristics
DC Electrical Characteristics, T
A
=+25C
PARAMETER SYMBOL
CONDITION
MIN
TYP
MAX
UNIT
V
DD
=3.3V
HP-IN
---
5.5
11
V
DD
= 5V
HP-IN
---
6.5
14
Stereo BTL
---
7
13
V
DD
=3.3V
Stereo SE
---
3.5
8
Stereo BTL
---
8
16
Supply Current
I
DD
V
DD
= 5V
Stereo SE
---
4
10
mA
DC Differential Output Voltage
V
O(DIFF)
V
DD
= 5V,Gain = 2
---
5
50
mV
Stereo BTL
---
8
16
HP-IN ---
6.5
14
Supply Current in Mute Mode
I
DD(MUTE)
V
DD
= 5V
Stereo SE
---
4
10
mA
I
DD
in Shutdown
I
SD
V
DD
= 5V
---
2
5
A
(AC Operation Characteristics, V
DD
= 5.0V, T
A
=+25C, R
L
= 4
, unless otherwise noted)
PARAMETER SYMBOL
CONDITION
MIN
TYP
MAX
UNIT
THD = 1%, BTL, R
L
= 4
--- 1.8 ---
THD = 1%, BTL, R
L
= 8
--- 1.12 ---
THD = 10%, BTL, R
L
= 4
--- 2 ---
THD = 10%, BTL, R
L
= 8
--- 1.4 ---
W
THD = 1%, SE, R
L
= 4
--- 500 ---
THD = 1%, SE, R
L
= 8
--- 320 ---
THD = 10%, SE, R
L
= 4
--- 650 ---
THD = 10%, SE, R
L
L = 8
--- 400 ---
Output power (each channel) see Note
P
(OUT)
THD = 0.5%, SE, R
L
= 32
--- 90 ---
mW
P
O
= 1.6W, BTL, R
L
= 4
--- 500 ---
P
O
= 1W, BTL, R
L
= 8
--- 150 ---
P
O
= 75mW, SE, R
L
= 32
--- 20 ---
Total harmonic distortion plus noise
THD+N
V
I
= 1V, RL = 10K
, G = 1
--- 10 ---
m%
Maximum output power bandwidth
B
OM
G = 1, THD =1%
---
20
---
kHz
Phase margin
R
L
= 4
, Open Load
--- 60 ---
Power supply ripple rejection
PSRR
f = 120Hz
---
75
---
dB
Mute
attenuation
--- 85 --- dB
Channel-to-channel output separation
f = 1kHz
---
82
---
dB
Line/HP input separation
---
80
---
dB
BTL attenuation in SE mode
---
85
---
dB
Input impedance
ZI
---
2
---
M
Signal-to-noise ratio
P
O
= 500mW, BTL
---
90
---
dB
Output noise voltage
V
n
Output noise voltage
---
55
---
V (rms)
Note :Output power is measured at the output terminals of the IC at 1kHz.
Ver: 1.6
Aug 04, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
3
G1421
Global Mixed-mode Technology Inc.
(AC Operation Characteristics, V
DD
= 3.3V, T
A
=+25C, R
L
= 4
, unless otherwise noted)
PARAMETER SYMBOL
CONDITION
MIN
TYP
MAX
UNIT
THD = 1%, BTL, R
L
= 4
--- 0.8 ---
THD = 1%, BTL, R
L
= 8
--- 0.5 ---
THD = 10%, BTL, R
L
= 4
--- 1 ---
THD = 10%, BTL, R
L
= 8
--- 0.6 ---
W
THD = 1%, SE, R
L
= 4
--- 230 ---
THD = 1%, SE, R
L
= 8
--- 140 ---
THD = 10%, SE, R
L
= 4
--- 290 ---
THD = 10%, SE, R
L
L = 8
--- 180 ---
Output power (each channel) see Note
P
(OUT)
THD = 0.5%, SE, R
L
= 32
--- 43 ---
mW
P
O
= 1.6W, BTL, R
L
= 4
--- 270 ---
P
O
= 1W, BTL, R
L
= 8
--- 100 ---
P
O
= 75mW, SE, R
L
= 32
--- 20 ---
Total harmonic distortion plus noise
THD+N
V
I
= 1V, RL = 10K
, G = 1
--- 10 ---
m%
Maximum output power bandwidth
B
OM
G = 1, THD 1%
---
20
---
kHz
Phase margin
R
L
= 4
, Open Load
--- 60 ---
Power supply ripple rejection
PSRR
f = 120Hz
---
75
---
dB
Mute
attenuation
--- 85 --- dB
Channel-to-channel output separation
f = 1kHz
---
80
---
dB
Line/HP input separation
---
80
---
dB
BTL attenuation in SE mode
---
85
---
dB
Input impedance
ZI
---
2
---
M
Signal-to-noise ratio
P
O
= 500mW, BTL
---
90
---
dB
Output noise voltage
V
n
Output noise voltage
---
55
---
V (rms)
Note :Output power is measured at the output terminals of the IC at 1kHz.
Ver: 1.6
Aug 04, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
4
G1421
Global Mixed-mode Technology Inc.
Typical Characteristics
Table of Graphs
FIGURE
vs Output Power 1,3,6,9,10,13,16,19,22,25,26,27,33,36,39
THD +N Total Harmonic Distortion Plus Noise vs Frequency
2,4,5,7,8,11,12,14,15,17,18,20,21,23,24,28,29
30,31,32,34,35,37,38,40,41
Output Noise Voltage
vs Frequency
42,43,44
Supply Ripple Rejection Ratio
vs Frequency
45,46,47
Crosstalk
vs Frequency
48,49,50,51,52
V
n
Closed loop Response
vs Frequency
53,54,55,56
I
DD
Supply Current
vs Supply Voltage
57
vs Supply Voltage
58,59
P
O
Output Power
vs Load Resistance
60,61
P
D
Power Dissipation
vs Output Power
62,63,64,65
0 .01
10
0 .02
0 .05
0.1
0.2
0.5
1
2
5
%
2 0
20k
50
100
2 00
5 00
1k
2 k
5 k
10 k
Hz
0 .01
10
0 .02
0 .05
0.1
0.2
0.5
1
2
5
%
3m
3
5 m
10 m
20m
5 0m
100m
20 0m
500 m
1
2
W
0 .01
10
0 .02
0 .05
0.1
0.2
0.5
1
2
5
%
3m
3
5 m
10 m
20m
50m
100m
20 0m
500 m
1
2
W
0 .01
10
0 .02
0 .05
0.1
0.2
0.5
1
2
5
%
2 0
20k
50
100
2 00
5 00
1k
2 k
5 k
10 k
Hz
VDD=5V
RL=3
BTL
20kHz
1kHz
20 Hz
VDD=5V
RL=3
BTL
Av=-2V/V
Po=1.8W
Po=1.5W
VDD=5V
RL=4
BTL
20kHz
1kHz
20 Hz
VDD=5V
RL=4
BTL
Po=1.5W
Av=-1V/V
Av=-4V/V
Av=-2V/V
Figure 1
Figure 2
Figure 3
Figure 4
Total Harmonic Distortion Plus
Noise vs Output Power
Total Harmonic Distortion Plus
Noise vs Output Frequency
Total Harmonic Distortion Plus
Noise vs Output Power
Total Harmonic Distortion Plus
Noise vs Output Frequency
Ver: 1.6
Aug 04, 2005
TEL: 886-3-5788833
http://www.gmt.com.tw
5
G1421
Global Mixed-mode Technology Inc.
0.01
10
0.02
0.05
0.1
0.2
0.5
1
2
5
%
2 0
20k
50
100
200
500
1k
2 k
5k
10k
Hz
0.01
10
0.02
0.05
0.1
0.2
0.5
1
2
5
%
3 m
3
5 m
10m
20m
50m
100m
20 0m
500 m
1
2
W
0.01
10
0.02
0.05
0.1
0.2
0.5
1
2
5
%
2 0
20k
50
100
200
500
1k
2 k
5k
10k
Hz
0.01
10
0.02
0.05
0.1
0.2
0.5
1
2
5
%
20
20k
50
10 0
2 00
5 00
1k
2 k
5 k
10k
Hz
0.01
10
0.02
0.05
0.1
0.2
0.5
1
2
5
%
1m
1
2m
5m
10m
20m
50m
100m
200 m
500 m
W
0.01
10
0.02
0.05
0.1
0.2
0.5
1
2
5
%
1 m
1
2m
5m
10m
20 m
50 m
100m
2 00 m
500 m
W
VDD=5V
RL=4
BTL
Av=-2V/V
Po=1.5W
Po=0.75W
Po=0.25W
VDD=5V
RL=8
BTL
Av=-2V/V
20kHz
1kHz
20Hz
VDD=5V
RL=8
BTL
Av=-2V/V
Po=1W
Po=0.25W
Po=0.5W
VDD=5V
RL=8
BTL
Po=1W
Av=-4V/V
Av=-2V/V
Av=-1V/V
VDD=3.3V
RL=3
BTL
20kHz
1kHz
20Hz
VDD=3.3V
RL=4
BTL
20kHz
1kHz
20Hz
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Total Harmonic Distortion Plus
Noise vs Output Frequency
Total Harmonic Distortion Plus
Noise vs Output Power
Total Harmonic Distortion Plus
Noise vs Output Frequency
Total Harmonic Distortion Plus
Noise vs Output Frequency
Total Harmonic Distortion Plus
Noise vs Output Power
Total Harmonic Distortion Plus
Noise vs Output Power