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Datasheet: G1426F2U (Global Mixed-mode Technology Inc)

2.2W Stereo Audio Amplifier

 

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Global Mixed-mode Technology Inc
Ver: 1.0
Dec 04, 2003
TEL: 886-3-5788833
http://www.gmt.com.tw
1
G1426
Global Mixed-mode Technology Inc.
2.2W Stereo Audio Amplifier
Features
Depop Circuitry Integrated
Output Power at 10% THD+N, VDD=5V
--2.2W/CH (typical) into a 4
Load
Output Power at 1% THD+N, VDD=5V
--2W/CH (typical) into a 4
Load
--1.2W/CH (typical) into a 8
Load
Bridge-Tied Load (BTL)
Shutdown Control Available
Thermal protection
Surface-Mount Power Package
20-Pin TSSOP-P
Applications
Stereo Power Amplifiers for Notebooks or
Desktop Computers
Multimedia Monitors
Stereo Power Amplifiers for Portable Audio
Systems
General Description
The G1426 is a stereo audio power amplifier in 20pin
TSSOP package. It can deliver 2W continuous RMS
power into 4
load per channel in Bridge-Tied Load
(BTL) mode at 5V supply voltage under 1% THD. To
simplify the audio system design in the notebook ap-
plication, The G1426 supports the Bridge-Tied Load
(BTL) mode for driving the speakers. For the low cur-
rent consumption applications, the SHDN mode is
supported to disable the G1426 when it is idle. The
current consumption can be further reduced to below
2A.
Ordering Information
ORDER
NUMBER
MARKING
TEMP.
RANGE
PACKAGE
G1426D5X
G1426
-40C to +85C
TSSOP-20L
G1426F2X
G1426
-40C to +85C TSSOP-20L (FD)
Note: X Specify the packing type
U: Tape & Reel T: Tube
* TSSOP-20L (FD): Thermal Pad
Pin Configuration
GND/HS
+OUTB
VDD
-OUTB
-INB
BYPASS
SHUTDOWN
+OUTA
VDD
-OUTA
-INA
GND/HS
+INA
NC
G1426
20Pin TSSOP
13
20
19
18
17
16
15
5
6
7
8
9
10
1
4
3
2
14
GND/HS
Thermal
Pad
Top View
Bottom View
+INB
11
12
NC
GND/HS
NC
GND/HS
GND/HS
+OUTB
VDD
-OUTB
-INB
BYPASS
SHUTDOWN
+OUTA
VDD
-OUTA
-INA
GND/HS
+INA
NC
G1426
20Pin TSSOP
13
20
19
18
17
16
15
5
6
7
8
9
10
1
4
3
2
14
GND/HS
Thermal
Pad
Top View
Bottom View
+INB
11
12
NC
GND/HS
NC
GND/HS
Ver: 1.0
Dec 04, 2003
TEL: 886-3-5788833
http://www.gmt.com.tw
2
G1426
Global Mixed-mode Technology Inc.
Absolute Maximum Ratings
Supply Voltage, V
CC
.............................................6V
Operating Ambient Temperature Range
T
A
...................................................-40C to +85C
Maximum Junction Temperature, T
J
...................150C
Storage Temperature Range, T
STG
........-65C to+150C
Soldering Temperature, 10seconds, T
S
................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...........................-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, V
DD
= 5.0V, T
A
=+25C, unless otherwise noted
PARAMETER SYMBOL
CONDITION
MIN
TYP
MAX
UNIT
Supply Current
I
DD
V
DD
= 5V
-
8.5
15
mA
DC Differential Output Voltage
V
O(DIFF)
V
DD
= 5V,Gain = 2
-
5
50
mV
I
DD
in Shutdown
I
SD
V
DD
= 5V
-
0.1
2
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
-
2
-
THD = 1%, BTL, R
L
= 8
-
1.25
-
THD = 10%, BTL, R
L
= 4
- 2.5 -
Output power (each channel) see Note
P
(OUT)
THD = 10%, BTL, R
L
= 8
- 1.6 -
W
P
O
= 1.6W, BTL, R
L
= 4
-
300
-
P
O
= 1W, BTL, R
L
= 8
-
100
-
Total harmonic distortion plus noise
THD+N
V
I
= 1V, RL = 10K
, G = 1
-
10
-
m%
Maximum output power bandwidth
B
OM
G = 10, THD = 1%
-
20
-
kHz
Phase margin
R
L
= 4
, Open Load
-
65
-
Power supply ripple rejection
PSRR
f = 120Hz
-
75
-
dB
Channel-to-channel output separation
f = 1kHz
-
80
-
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: 1.0
Dec 04, 2003
TEL: 886-3-5788833
http://www.gmt.com.tw
3
G1426
Global Mixed-mode Technology Inc.
Pin Description
PIN NAME I/O
FUNCTION
1
SHUTDOWN
I
Shutdown mode control signal input, places entire IC in shutdown mode when held
high, I
DD
is below 2A.
2,7,10,19,20
GND/HS
Ground connection for circuitry, directly connected to thermal pad.
3
+OUTA
O
A channel + output
4,17
VDD
Supply voltage for circuitry.
5
-OUTA
O
A channel - output
6
-INA
I
A channel input signal
8
+INA
I
A channel positive input of OPAMP, biasing DC operation of OPAMP
9 NC I
NC
11 NC I
NC
12 NC
NC
13
+INB
I
B channel positive input of OPAMP, biasing DC operation of OPAMP
14
BYPASS
Connect to voltage divider for internal mid-supply bias.
15
-INB
I
B channel input signal
16
-OUTB
O
B channel - output
18
+OUTB
O
B channel + output
Typical Characteristics
Table of Graphs
V
n
Output noise voltage
Supply ripple rejection ratio
Crosstalk
Closed loop response
17
I
DD
Supply current
P
D
Power dissipation
TOTAL HARMONIC DISTORTION PLUS NOISE
TOTAL HARMONIC DISTORTION PLUS NOISE
vs OUTPUT POWER
vs FREQUENCY
vs Output power
19,20
FIGURE
THD +N Total harmonic distortion plus noise
vs Frequency
2,4,6,9,11
vs Output power
1,3,5,7,8,10
vs Frequency
13
vs Frequency
12
vs Frequency
14
vs Frequency
vs supply voltage
15
P
O
Output power
vs supply voltage
16
vs Load resistance
18
0.01
10
0.02
0.05
0.1
0.2
0.5
1
2
5
%
3m
3
5m
10m
20m
50m
100m
200m
500m
1
2
W
VDD=5V
RL=3
BTL
Av=-2V/V
1kHz
20kHz
20Hz
0.01
10
0.02
0.05
0.1
0.2
0.5
1
2
5
%
20
20k
50
100
200
500
1k
2k
5k
10k
Hz
Po=1.8W
VDD=5V
RL=3
BTL
Av=-2V/V
Figure 1
Figure 2
Global Mixed-mode Technology Inc.
G1426
Ver: 1.0
Dec 04, 2003
TEL: 886-3-5788833
http://www.gmt.com.tw
4
TOTAL HARMONIC DISTORTION PLUS NOISE
TOTAL HARMONIC DISTORTION PLUS NOISE
vs OUTPUT POWER
vs FREQUENCY
TOTAL HARMONIC DISTORTION PLUS NOISE
TOTAL HARMONIC DISTORTION PLUS NOISE
vs OUTPUT POWER
vs FREQUENCY
0.01
10
0.02
0.05
0.1
0.2
0.5
1
2
5
%
3m
3
5m
10m
20m
50m
100m
200m
500m
1
2
W
VDD=5V
RL=4
BTL
Av=-2V/V
1kHz
20Hz
20kHz
0.01
10
0.02
0.05
0.1
0.2
0.5
1
2
5
%
20
20k
50
100
200
500
1k
2k
5k
10k
Hz
VDD=5V
RL=4
BTL
Po=2W
Av=-1V/V
Av=-2V/V
Av=-4V/V
0.01
10
0.02
0.05
0.1
0.2
0.5
1
2
5
%
2m
2
5m
10m
20m
50m
100m
200m
500m
1
W
VDD=5V
RL=8
BTL
Av=-2V/V
20kHz
1kHz
20Hz
0.01
10
0.02
0.05
0.1
0.2
0.5
1
2
5
%
20
20k
50
100
200
500
1k
2k
5k
10k
Hz
VDD=5V
RL=8
BTL
Po=1W
Av=-1V/V
Av=-2V/V
Av=-4V/V
Figure 3
Figure 4
Figure 5
Figure 6
Global Mixed-mode Technology Inc.
G1426
Ver: 1.0
Dec 04, 2003
TEL: 886-3-5788833
http://www.gmt.com.tw
5
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