YOUDA INTEGRATED CIRCUIT
YD2025D
1.3W STEREO AUDIO AMPLIFIER----YD2025D
DESCRIPTION
The YD2025D is a monolithic integrated audio Amplifier in a SOP20. It is designed for portable cassette
players and radios.
FEATURES
*Working voltage down to 3V;
*Few external components;
*High channel isolation;
*Voltage gain up to 45dB (Adjustable with external resistor);
*Soft clipping;
*Internal thermal protection;
BLOCK DIAGRAM
2 0
1 9
1 8
1 7
1 6
1 5
1 4
1 3
1 2
1 1
R
I
P
P
L
E
F
I
L
T
E
R
1 0
9
8
7
6
5
4
3
2
1
+
-
+
-
WuXi YouDa Electronics Co., Ltd
Add: No.5 Xijin Road, National Hi-Tech Industrial Development Zone, Wuxi Jiangsu China
Tel: 86-510-85205117 86-510-85205106 Fax: 86-510-85205110 Website: www.e-youda.com
SHENZHEN OFFICE Tel 86-755-83740369 Fax 86-755-83741418
Ver 5.0 1 of 4 2006-06-28
YOUDA INTEGRATED CIRCUIT
YD2025D
ABSOLUTE MAXIMUM RATINGS
(Tamb=25)
PARAMETER SYMBOL
VALUE
UNIT
Supply Voltage
Vcc
15
V
Output Peak Current
Io
1.5
A
Power Dissipation (No Heat Sink)
P
D
1.0
W
Ambient operating temperature range
Topr
-20+75
Storage Temperature
Tstg
-40+150
Electrical CHARACTERISTICS
(Tamb=20, Vcc=9V,
f=1kHz, Stereo, Unless otherwise specified)
PARAMETER SYMBOL TEST
CONDITIONS NIN
TYP
MAX
UNIT
Supply
Voltage
Vcc
3 9 V
Quiescent Current
Iccq
40
50
mA
Quiescent Output
Voltage
Vo
4.5 V
Stereo
43 45 47
Voltage Gain
Gv
Bridge
49 51 53
dB
Voltage Gain Difference
Gv
1
dB
Input
Impedance
Zi
30 k
Vcc=9V, R
L
=8
1.3 W
Vcc=6V, R
L
=4 0.7
1
W
Vcc=6V, R
L
=8
0.6 W
Output Power
(STEREO)
Vcc=3V, R
L
=4
0.1 W
Output Power
(BTL)
Po
(THD
=10%)
Vcc=6V, R
L
=8
1.5 W
Stereo ,R
L
=8, Po=250mW
0.3
1.5
%
Distortion THD
BTL,R
L
=8,
Po=250mW 0.5 %
Supply Voltage
Rejection
RR
Rg=0, G
V
=45dB,
Vr=150mV, f=100Hz
40 46 dB
Rg=0
1.5
3
V
Input Noise Voltage
V
NI
G
V
=45dB,
BPF=20Hz
20kHz
Rg=10k 3 6 V
Cross-Talk CT
Rg=10k, f=1kHz,
R
L
=8, Po=0.5W
40 55 dB
WuXi YouDa Electronics Co., Ltd 2 of 4 Website: www.e-youda.com
YOUDA INTEGRATED CIRCUIT
YD2025D
APPLICATION CIRCUIT
1YD2025D TYPE APPLICATION
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+
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9
10
20
2
3
11
8
Vcc
IN2
0.1 100
2.2
100
2.2
100
470
4.7
0.1
100
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12
19
18
13
IN1
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470
4.7
0.1
1
+
100
100
47 / 1417
(2) YD2025D BTL APPLICATION
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9
10
20
2
3
11
8
Vcc
0.1 100
100
2.2
100
4.7
0.1
100
+
+
12
19
18
13
IN1
4.7
0.1
1
100
100
47 / 1417
WuXi YouDa Electronics Co., Ltd 3 of 4 Website: www.e-youda.com
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