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NTE7155
Integrated Circuit
Dual Low–Voltage Power Amplifier
Description:
The NTE7155 is a monolithic integrated circuit in an 8–Lead 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
Peak Output Current, I
Total Power Dissipation, P
S
O
D
TA = +50°C 1.0W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T
= +50°C 1.4W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C
Operating Junction Temperature Range, T
Storage Temperature Range, T
stg
Thermal Resistance, Junction–to–Ambient, R
J
thJA
Thermal Resistance, Junction–to–Case (Pin4), R
–40° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–40° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
thJC
15V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
100°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
70°C/W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Charactgeristics: (VS = 6V, TA = +25°C unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Stereo
Supply Voltage V
Quiescent Output Voltage V
Quiescent Drain Current I
Input Bias Current I
S
O
VS = 3V – 1.2 – V
D
B
1.8 – 15 V
– 2.7 – V
– 6 9 mA
– 100 – nA
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Electrical Charactgeristics (Cont’d): (VS = 6V, TA = +25°C unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Stereo (Cont’d)
Output Power (Each Channel)
P
(f = 1kHz, d = 10%)
Distortion (f = 1kHz) d RL = 32Ω, PO = 40mW – 0.2 – %
Closed Loop Voltage Gain G
Channel Balance ∆G
Input Resistance R
Total Input Noise e
Supply Voltage Rejection SVR f = 100Hz, C1 = C2 = 100µF 24 30 – dB
Channel Separation C
Bridge
Supply Voltage V
Quiescent Drain Current I
Output Offset Voltage (Between Outputs) V
Input Bias Current I
Output Power (f = 1kHz, d = 10%)
P
RL = 32Ω VS = 9V – 300 – mW
O
VS = 6V 90 120 – mW
VS = 4.5V – 60 – mW
VS = 3V 15 20 – mW
VS = 2V – 5 – mW
RL = 16Ω VS = 6V 170 220 – mW
RL = 8Ω VS = 9V – 1000 – mW
VS = 6V 300 380 – mW
RL = 4Ω VS = 6V 450 650 – mW
VS = 4.5V – 320 – mW
VS = 3V – 110 – mW
RL = 16Ω, PO = 75mW – 0.2 – %
RL = 8Ω, PO = 150mW – 0.2 – %
f = 1kHz 36 39 41 dB
V
V
f = 1kHz 100 – – kΩ
I
N
RS = 10kΩ
B = Curve A – 2.0 – µV
– – ±1 dB
B = 22Hz to 22kHz – 2.5 – µV
f = 1kHz – 50 – dB
S
S
RL = ∞ – 6 9 mA
D
RL = 8Ω – – ±50 mV
OS
B
RL = 32Ω VS = 9V – 1000 – mW
O
1.8 – 15 V
– 100 – nA
VS = 6V 320 400 – mW
VS = 4.5V – 200 – mW
VS = 3V 50 65 – mW
VS = 2V – 8 – mW
RL = 16Ω VS = 9V – 2000 – mW
VS = 6V – 800 – mW
VS = 3V – 120 – mW
RL = 8Ω VS = 6V 900 1350 – mW
VS = 4.5V – 700 – mW
VS = 3V – 220 – mW
RL = 4Ω VS = 4.5V – 1000 – mW
VS = 3V 200 350 – mW
VS = 2V – 80 – mW
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Electrical Charactgeristics (Cont’d): (VS = 6V, TA = +25°C unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
Bridge (Cont’d)
Distortion d RL = 8Ω, PO = 0.5W, f = 1kHz – 0.2 – %
Closed Loop Voltage Gain G
Input Resistance R
Total Input Noise e
Supply Voltage Rejection SVR f = 100Hz – 40 – dB
Power bandwidth (–3dB) B RL = 8Ω, PO = 1W – 120 – kHz
Pin Connection Diagram
f = 1kHz – 39 – dB
V
f = 1kHz 100 – – kΩ
I
N
RS = 10kΩ
B = Curve A – 2.5 – µV
B = 22Hz to 22kHz – 3.0 – µV
Output 1
Supply Voltage
Output 2
GND
85
14
.430 (10.92)
Max
1
2
3
4
(–) Input 1
8
(+) Input 1
7
6
(+) Input 2
(–) Input 2
5
.260 (6.6) Max
.300 (7.62)
.100 (2.54)
.200
(5.08)
.125 (3.18) Min
.300 (7.62)
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