yd2025a
TRANSCRIPT
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YOUD INTEGR TED CIRCUIT YD2 25A
2.4W STEREO AUDIO POWER AMP YD2025ADESCRIPTION
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,RL=4,THD=10%
Bridge: Po=4.7W(Typ) at Vcc=9V,RL=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
910111213141516
-
+
+
-
5k
50 RIPP
LE
FILTER
GND
GNDPre-GNDVcc
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 86-755-83741418Ver 5.0 1 of 4 2006-06-18
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YOUD INTEGR TED CIRCUIT YD2 25A
ABSOLUTE MAXIMUM RATINGS (Tamb=25)
PARAMETERSYMBOL VALUE UNIT
Vi=0 20Supply Voltage
Vi>0VCC
15V
Output Peak Current Iop 2.0 A
80*60*1.2mm3
PCB PD1 3.5 WPowerDissipation
No Heat Sink PD2 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 SupplyVoltage
Vcc Vi>0 6 9 15 V
Quiescent Circuit
CurrentICCQ Vi=0 26 40 mA
THD=10%, RL=4 2.0 2.4Output Power PO
THD=10%, RL=3 3.0W/CH
Total HarmonicDistortion
THD PO=0.4W/CH 0.2 1.0 %
Stereo 43 45 47Closed Loop Voltage
GainGv
Bridge 49 51 53dB
Input Resistance Zi f=1kHz 30 k
Output Noise Voltage VNORg=10k,
BPF=22Hz22kHz 0.3 1.0 mV
Ripple Rejection Ratio RR F=100Hz, Rg=600 46 dB
Cross-Talk CT VO=0dBm 46 55 dB
WuXi YouDa Electronics Co., Ltd 2 of 4 Website: www.e-youda.com
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YOUD INTEGR TED CIRCUIT YD2 25A
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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YOUD INTEGR TED CIRCUIT YD2 25A
OUTLINE DRAWING
WuXi YouDa Electronics Co., Ltd 4 of 4 Website: www.e-youda.com