NTE NTE1232 Datasheet
NTE1232
Integrated Circuit
Audio Amplifier for Car Radio, 8W
Description:
The NTE1232 is a Class B audio amplifier in a 5–Lead TO220 type package designed for driving low
impedance loads (down to 1.6Ω). This device provides a high output current capability (up to 3.5A),
very low harmonic and cross–over distortion.
Features:
D Low Number of External Components
D No Electrical Insulation Requirement
D Space and Cost Saving
D High Reliability
D Flexibility in Use
D Complete Safety During Operation due to Protection Against:
Short Circuit
Thermal Over Range
Fortuitous Open Ground
Polarity Inversion (V
Load Dump Voltage Surge
= 12V Max)
s
Absolute Maximum Ratings;
Peak Supply Voltage (50ms), V
DC Supply Voltage, V
s
Operating Supply Voltage, V
Output Peak Current, I
o
s
s
Repetitive 3.5A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Non–Repetitive 4.5A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Dissipation (T
= +90°C), P
C
tot
Operating Junction Temperature Range, T
Storage Temperature Range, T
stg
Thermal Resistance, Junction–to–Case, R
J
thJC
40V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15W. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–40° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
–40° to +150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4°C/W max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Characteristics: (VS = 14.4V, TA = +25°C unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
DC Characteristics
Supply Voltage V
Quiescent Output Voltage (Pin4) V
Quiescent Drain Current (Pin5) I
s
o
d
8 – 18 V
6.4 7.2 8.0 V
– 45 80 mA
AC Characteristics (GV = 40dB)
Output Power P
d = 10%, f = 1kHz
o
RL = 4Ω 4.8 5.2 – W
RL = 2Ω 7.0 8.0 – W
Vs = 16V, d = 10%, f = 1kHz
RL = 4Ω – 6.5 – W
RL = 2Ω – 10 – W
Input Saturation Voltage V
i(rms)
Input Sensitivity V
f = 1kHz, Po = 0.5W
i
RL = 4Ω – 15 – mV
600 – – mV
RL = 2Ω – 11 – mV
f = 1kHz, Po = 5.2W, RL = 4Ω – 55 – mV
f = 1kHz, Po = 8W, RL = 2Ω – 50 – mV
Frequency Response (–3dB) B RL = 4Ω, Po = 1W 40 to 15,000 Hz
Distortion d f = 1kHz, Po = 0.05 to 3.5W, RL = 4Ω – 0.2 – %
f = 1kHz, Po = 0.05 to 5W, RL = 2Ω – 0.2 – %
Input Resistance (Pin1) R
Voltage Gain (Open Loop) G
Voltage Gain (Closed Loop) G
Input Noise Voltage e
Input Noise Current i
N
f = 1kHz 70 150 – kΩ
i
f = 1kHz, RL = 4Ω – 80 – dB
V
f = 1kHz, RL = 4Ω 39.5 40.0 40.5 dB
V
Note 1 – 4 – µV
N
Note 1 – 60 – pA
Efficiency η Po = 5.2W, RL = 4Ω
Po = 8W, RL = 2Ω – 58 – %
Supply Voltage Rejection SVR RL = 4Ω, Rg = 10kΩ, f
Note 1. Filter with noise bandwidth: 22Hz to 22kHz.
f = 1kHz
= 100Hz 30 35 – dB
ripple
– 68 – %
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