YOUDA INTEGRATED CIRCUIT
YD2025A
2.4W STEREO AUDIO POWER AMP----YD2025A
DESCRIPTION
The YD2025A is a monolithic integrated circuit consisting of a 2-channel power amplifier. It is suitable for
stereo and bridge amplifier application of radio cassette tape recorder.
FEATURES
*High output power
Stereo: Po=2.4W(Typ) at Vcc=9V,R
L
=4,THD=10%
Bridge: Po=4.7W(Typ) at Vcc=9V,R
L
=8,THD=10%
*Small shock noise at the time of power on/off due to a built-in muting circuit
*Good ripple rejection due to a built-in ripple filter
*Good channel separation
*Soft tone at the time of output saturation
*Closed loop voltage gain fixed 45dB (Bridge: 51dB) but availability with external resistor added
*Minimum number of external parts required
BLOCK DIAGRAM
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
-
+
+
-
5k
50
RIPPLE FILTER
GND
GND
Pre-GND
Vcc
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 2006-06-18
YOUDAINTEGRATED CIRCUIT
YD2025A
ABSOLUTE MAXIMUM RATINGS
(Tamb=25)
PARAMETER
SYMBOL VALUE UNIT
Vi=0 20
Supply Voltage
Vi>0
V
CC
15
V
Output Peak Current
Iop
2.0 A
80*60*1.2mm
3
PCB P
D
1
3.5
W
Power
Dissipation
No Heat Sink
P
D
2 1.6
W
Operating Temperature
Topr
-20+75
Storage Temperature
Tstg
-55+150
ELECTRICAL CHARACTERISTICS
(Tamb=25, Vcc=9V, f=1kHz, Rg=600, Unless otherwise specified)
PARAMETER SYMBOL TEST
CONDITIONS MIN
TYP
MAX
UNIT
Operating Supply
Voltage
Vcc Vi>0 6
9
15
V
Quiescent Circuit
Current
I
CCQ
Vi=0
26
40
mA
THD=10%, R
L
=4
2.0 2.4
Output Power
P
O
THD=10%, R
L
=3
3.0
W/CH
Total Harmonic
Distortion
THD P
O
=0.4W/CH
0.2
1.0
%
Stereo 43
45
47
Closed Loop Voltage
Gain
Gv
Bridge 49
51
53
dB
Input Resistance
Zi
f=1kHz
30
k
Output Noise Voltage
V
NO
Rg=10k,
BPF=22Hz22kHz
0.3
1.0 mV
Ripple Rejection Ratio
RR
F=100Hz, Rg=600
46 dB
Cross-Talk CT
V
O
=0dBm 46
55
dB
WuXi YouDa Electronics Co., Ltd 2 of 4 Website: www.e-youda.com
YOUDA INTEGRATED CIRCUIT
YD2025A
APPLICATION CIRCUIT
1YD2025A TYPE APPLICATION
16
4
8
6
5
7
12
10
9
13
11
+
100
+
2.2
+
100
+
2.2
+
470 0.1
+
100
Vcc
IN 1
IN 2
2
3
14
+
100
+
470
0.15
RL
15
+
100
+
470
0.15
RL
1
+
_
_
+
(2) YD2025A BTL APPLICATION
16
4
8
6
5
7
12
10
9
13
11
+
100
+
100
+
2.2
+
470
+
100
Vcc
IN
1
2
3
14
+
100
0.15
15
+
100
0.15
RL
+
_
_
+
WuXi YouDa Electronics Co., Ltd 3 of 4 Website: www.e-youda.com
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