UTC TEA2025 LINEAR INTEGRATED CIRCUIT
STEREO AUDIO AMPLIFIER
DESCRIPTION
The UTC TEA2025 is a monolithic integrated audio
amplifier in a 16-pin plastic dual in line package. 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
PIN CONFIGURATIONS
BRIDGE
BOOT.2
FEEDBACK
IN.2 (+)
OUT.2
GND
GND
1
2
3
4
5
6
7
16
+Vs
15
OUT.1
14
BOOT.1
13
GND
12
GND
11
FEEDBACK
10
IN.1 (+)
98
GND (sub)SVR
DIP-16
BLOCK DIAGRAM
9 10 11 12 13 14 15
50
8
7
THERMAL
PROTECTION
START
CIRCUIT
Ω
50
Ω
10k
Ω
DECOUPLING
10k
Ω
4
5k
Ω
16
50
Ω
1
2356
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R107-003,A
1
UTC TEA2025 LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
PARAMETER SYMBOL VALUE UNIT
Supply Voltage VS 15 V
Output Peak Current IO 1.5 A
Junction Temperature Tj 150 °C
Storage Temperature Tstg -40 ~ +150 °C
ELECTRICAL CHARACTERISTICS(Ta=25°C,VCC=9V,Stereo,Unless otherwise specified)
PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT
Supply Voltage VS 3 12 V
Quiescent Current IQ 40 50 mA
Quiescent output voltage VO 4.5 V
Voltage gain AV Stereo 43 45 47 dB
Bridge 49 51 53
Voltage gain difference ∆AV +-1 dB
Input impedance Ri 30 kΩ
f=1kHz;d=10%
Stereo per channel
VCC=9V;RL=4Ω
RL=8Ω
Output Power PO VCC=6V;RL=4Ω
Distortion d
Supply voltage Rejection SVR
Input noise Voltage Vn
Cross-Talk C.T. RG=10kΩ;
RL=8Ω
VCC=3V;RL=4Ω 0.1
Bridge
VCC=9V;RL=8Ω
VCC=6V;RL=4Ω 2.8
VCC=9V;RL=4Ω
f=1kHz;PO=250mW
Stereo 0.3 1.5 %
Bridge 0.5
RG=0;AV=45dB
Vripple=150mVRMS
Fripple=100Hz
AV=200
Bandwidth:
20Hz to 20kHz
RG=0
RG=10kΩ
f=1kHz;RL=4Ω
PO=1W
1.7 2.3
1.3
0.7 1
0.6 W
4.7
40 46 dB
1.5
40 55 dB
3
3
6
µV
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R107-003,A
2
UTC TEA2025 LINEAR INTEGRATED CIRCUIT
THERMAL RESISTANCE
Rth(j-c):Junction to case thermal resistance 15°C/W
Rth(j-a):Junction to ambient thermal resistance 60°C/W
TYPICAL PERFORMANCE CHARACTERISTICS
d(%)
10
1
0 0.2 0.4 0.6 0.8 1.0 1.2
10
d(%)
1
0.1
10
Distortion versus output power
Vcc=6V
RL=40Ω
Distortion versus output Frequency
Vcc=9V
RL=9Ω
Po=1.5W
100 1k 10k 100k
f(Hz)
P0(W)
Po(W)
Distortion versus output power
d(%)
1
Vcc=6V
RL=8Ω
0.1
0
0.2 0.4 0.6 0.8 1.0 1.2
Output power/versus supply voltage
8
6
f=1kHz
d=10%
4
2
0
RL=4Ω
4
8
P0(W)
120
Vcc(V)
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R107-003,A
3
UTC TEA2025 LINEAR INTEGRATED CIRCUIT
OUT1
OUT2
RL
RL
APPLICATION CIRCUIT
Vin
Vcc
0.22 µF
100 µF
100 µF
100µF
100 µF
10
11
7
6
1
8
16
4,5,9,12,13
100 µF
14
15
0.15µF
RL
3
2
100µF
0.15µF
Vin
Vin
Vcc
1
2
0.22 µF
100 µF
0.22 µF
100 µF
100 µF
100 µF
10
11
7
6
8
16
4,5,9,12,13
14
15
3
2
100 µF
0.15 µF
100 µF
0.15 µF
Fig. 5 Bridge Application Fig.6 Stereo Application
SCHEMATIC DIAGRAM
I2+ I2-
678
+Vs
16
3
470 µF
470 µF
OUT 2
2
GND
9
I1+ I1-
1
1110
4
5
14
OUT 1
15
12
13
UTC UNISONIC TECHNOLOGIES CO., LTD.
QW-R107-003,A
4
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