UTC TEA2025A LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
1
QW-R107-012,A
2.3W DUAL AUDIO POWER
AMPLIFIER
DESCRIPTION
The UTC TEA2025A 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
recorders.
FEATURES
*High output power
Stereo: Po=2.3W (Typ) at Vcc=9V, RL=4
Bridge: Po=4.7W (Typ) at Vcc=9V, RL=8
*Low switching distortion at high frequency
*Small shock noise at the time of power on/off dur 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 straiten
*Closed loop voltage gain fixed 45dB (Bridge: 51dB) but
availability with external resistor added
*Minimum number of external parts required
*Easy to design radiator fin
DIP-12H
BLOCK DIAGRAM
UTC TEA2025A LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
2
QW-R107-012,A
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
VALUE
UNIT
Supply Voltage
V
S
15
V
Power Dissipation
Pd
4*
W
Operating Temperature
Topr
-20 ~ +70
C
Storage Temperature
Tstg
-40 ~ +150
C
ELECTRICAL CHARACTERISTICS
(Ta=25
C
,V
CC
=9V, Rg=600
, Unless otherwise specified)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Operating Supply Voltage
Vcc
9
11
V
Quiescent Current
Icc
Vi=0, Stereo
40
55
mA
Closed Loop Voltage Gain
Av
Stereo, Vi=-45dBm
43
45
47
dB
Bridge, Vi=-45dBm
49
51
53
dB
Channel Balance
CB
Stereo
-1
0
+1
dB
Output Power
PO
Stereo, RL=4
, THD=10%
1.7
2.3
W
Stereo, RL=8
, THD=10%
1.3
W
Bridge, RL=8
, THD=10%
4.7
W
Total Harmonic Distortion
THD
Stereo, Po=250mW, R
L
=4
0.3
1.5
%
Bridge, Po=250mW, R
L
=4
0.5
%
Input Resistance
Ri
21
30
k
Rijpple Rejection
RR
Stereo, Rg=0
, Vr=150mV,
f=100Hz
40
46
dB
Output Noise Voltage
V
NO
Stereo, Rg=0
0.3
1
mV
Stereo, Rg=10K
0.5
2
mV
Cross-Talk
CT
Stereo, Rg=10K
, Vo=0dBm
40
55
dB
UTC TEA2025A LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
3
QW-R107-012,A
APPLICATION CIRCUIT: Stereo Amplifier
APPLICATION CIRCUIT: Bridge Amplifier
UTC TEA2025A LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
4
QW-R107-012,A
VOLTAGE GAIN ADJUSTMENT
1. Stereo application
2. Bridge application
UTC TEA2025A LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
5
QW-R107-012,A
OUTPUT PORWER-INPUT VOLTAGE
PREQUENCY RESPONSE
UTC TEA2025A LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
6
QW-R107-012,A
UTC TEA2025A LINEAR INTEGRATED CIRCUIT
UTC
UNISONIC TECHNOLOGIES CO., LTD.
7
QW-R107-012,A
QUIESCENT CIRCUIT CURRENT SUPPLY VOLTAGE
QUIESCENT CIRCUIT CURRENT AMBIENT TEMPERATURE
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