NTE7155
Integrated Circuit
Dual LowVoltage Power Amplifier
Description:
The NTE7155 is a monolithic integrated circuit in an 8Lead DIP type package designed for use as
a dual audio power amplifier in portable cassette players and radios.
Features:
D
Supply Voltage Down To 1.8V
D
Low Crossover Distortion
D
Low Quiescent Current
D
Bridge or Stereo Configuration
Absolute Maximum Ratings:
Supply Voltage, V
S
15V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Peak Output Current, I
O
1A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total Power Dissipation, P
D
T
A
= +50
C
1.0W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T
C
= +50
C
1.4W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Junction Temperature Range, T
J
40
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage Temperature Range, T
stg
40
to +150
C
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Resistance, JunctiontoAmbient, R
thJA
100
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Thermal Resistance, JunctiontoCase (Pin4), R
thJC
70
C/W
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Charactgeristics: (V
S
= 6V, T
A
= +25
C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Stereo
Supply Voltage
V
S
1.8
15
V
Quiescent Output Voltage
V
O
2.7
V
V
S
= 3V
1.2
V
Quiescent Drain Current
I
D
6
9
mA
Input Bias Current
I
B
100
nA
Electrical Charactgeristics (Cont'd): (V
S
= 6V, T
A
= +25
C unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Stereo (Cont'd)
Output Power (Each Channel)
P
O
R
L
= 32
V
S
= 9V
300
mW
(f = 1kHz, d = 10%)
V
S
= 6V
90
120
mW
V
S
= 4.5V
60
mW
V
S
= 3V
15
20
mW
V
S
= 2V
5
mW
R
L
= 16
V
S
= 6V
170
220
mW
R
L
= 8
V
S
= 9V
1000
mW
V
S
= 6V
300
380
mW
R
L
= 4
V
S
= 6V
450
650
mW
V
S
= 4.5V
320
mW
V
S
= 3V
110
mW
Distortion (f = 1kHz)
d
R
L
= 32
, P
O
= 40mW
0.2
%
R
L
= 16
, P
O
= 75mW
0.2
%
R
L
= 8
, P
O
= 150mW
0.2
%
Closed Loop Voltage Gain
G
V
f = 1kHz
36
39
41
dB
Channel Balance
G
V
1
dB
Input Resistance
R
I
f = 1kHz
100
k
Total Input Noise
e
N
R
S
= 10k
B = Curve A
2.0
V
B = 22Hz to 22kHz
2.5
V
Supply Voltage Rejection
SVR
f = 100Hz, C1 = C2 = 100
F
24
30
dB
Channel Separation
C
S
f = 1kHz
50
dB
Bridge
Supply Voltage
V
S
1.8
15
V
Quiescent Drain Current
I
D
R
L
=
6
9
mA
Output Offset Voltage (Between Outputs)
V
OS
R
L
= 8
50
mV
Input Bias Current
I
B
100
nA
Output Power (f = 1kHz, d = 10%)
P
O
R
L
= 32
V
S
= 9V
1000
mW
V
S
= 6V
320
400
mW
V
S
= 4.5V
200
mW
V
S
= 3V
50
65
mW
V
S
= 2V
8
mW
R
L
= 16
V
S
= 9V
2000
mW
V
S
= 6V
800
mW
V
S
= 3V
120
mW
R
L
= 8
V
S
= 6V
900
1350
mW
V
S
= 4.5V
700
mW
V
S
= 3V
220
mW
R
L
= 4
V
S
= 4.5V
1000
mW
V
S
= 3V
200
350
mW
V
S
= 2V
80
mW
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