UTC TEA2025
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R107-003,A
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
DIP-16
PIN CONFIGURATIONS
1
2
3
4
16
15
14
13
12
11
10
9
8
7
6
5
+Vs
OUT.1
BOOT.1
GND
GND
FEEDBACK
IN.1 (+)
GND (sub)
SVR
IN.2 (+)
FEEDBACK
GND
GND
BOOT.2
OUT.2
BRIDGE
BLOCK DIAGRAM
7
8
9
10
11
12
13
14
15
16
1
2
3
5
6
4
THERMAL
PROTECTION
START
CIRCUIT
DECOUPLING
10k
10k
50
50
50
5k
UTC TEA2025
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R107-003,A
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
VALUE
UNIT
Supply Voltage
V
S
15
V
Output Peak Current
I
O
1.5
A
Junction Temperature
Tj
150
C
Storage Temperature
Tstg
-40 ~ +150
C
ELECTRICAL CHARACTERISTICS
(Ta=25
C,V
CC
=9V,Stereo,Unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Supply Voltage
V
S
3
12
V
Quiescent Current
I
Q
40
50
mA
Quiescent output voltage
V
O
4.5
V
Voltage gain
A
V
Stereo
43
45
47
dB
Bridge
49
51
53
Voltage gain difference
A
V
+-1
dB
Input impedance
Ri
30
k
f=1kHz;d=10%
Stereo per channel
V
CC
=9V;R
L
=4
R
L
=8
1.7
2.3
1.3
Output Power
P
O
V
CC
=6V;R
L
=4
R
L
=8
0.7
1
0.6
W
V
CC
=3V;R
L
=4
0.1
Bridge
V
CC
=9V;R
L
=8
4.7
V
CC
=6V;R
L
=4
2.8
Distortion
d
V
CC
=9V;R
L
=4
f=1kHz;P
O
=250mW
Stereo
0.3
1.5
%
Bridge
0.5
Supply voltage Rejection
SVR
R
G
=0;A
V
=45dB
Vripple=150mVRMS
Fripple=100Hz
40
46
dB
Input noise Voltage
Vn
A
V
=200
Bandwidth:
20Hz to 20kHz
R
G
=0
R
G
=10k
1.5
3
3
6
V
Cross-Talk
C.T.
R
G
=10k
;
f=1kHz;R
L
=4
P
O
=1W
40
55
dB
UTC TEA2025
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R107-003,A
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
1
10
0
0.2
0.4
0.6
0.8
1.0
1.2
P0(W)
d(%)
Distortion versus output power
0.1
1
0
0.2
0.4
0.6
0.8
1.0
1.2
P0(W)
d(%)
Distortion versus output power
Vcc=6V
RL=40
Vcc=6V
RL=8
10
100
1k
10k
100k
0.1
1
10
d(%)
f(Hz)
Vcc=9V
RL=9
Po=1.5W
Distortion versus output Frequency
4
8
12
0
0
2
4
6
8
Po(W)
Vcc(V)
f=1kHz
d=10%
RL=4
Output power/versus supply voltage
UTC TEA2025
LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
4
QW-R107-003,A
APPLICATION CIRCUIT
16
10
11
7
6
1
8
4,5,9,12,13
14
15
3
2
100
F
0.15
F
100
F
0.15
F
RL
100
F
100
F
100
F
0.22
F
100
F
Vin
Vcc
16
10
11
7
6
8
4,5,9,12,13
14
15
3
2
100
F
0.15
F
470
F
100
F
100
F
0.22
F
100
F
Vin
1
Vcc
100
F
0.22
F
Vin
2
470
F
0.15
F
100
F
OUT1
OUT2
RL
RL
Fig. 5 Bridge Application Fig.6 Stereo Application
SCHEMATIC DIAGRAM
16
3
6
7
8
2
4
5
15
12
13
14
11
10
9
1
OUT 1
OUT 2
I1+
I1-
I2+
I2-
+Vs
GND
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