1232

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 (Vs = 12V Max)
Load Dump Voltage Surge
Absolute Maximum Ratings;
Peak Supply Voltage (50ms), Vs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40V
DC Supply Voltage, Vs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28V
Operating Supply Voltage, Vs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V
Output Peak Current, Io
Repetitive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5A
Non-Repetitive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.5A
Power Dissipation (TC = +90°C), Ptot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15W
Operating Junction Temperature Range, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40° to +150°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40° to +150°C
Thermal Resistance, Junction-to-Case, RthJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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
Vs
8
-
18
V
Quiescent Output Voltage (Pin4)
Vo
6.4
7.2
8.0
V
Quiescent Drain Current (Pin5)
Id
-
45
80
mA
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
600
-
-
mV
RL = 4Ω
-
15
-
mV
RL = 2Ω
-
11
-
mV
f = 1kHz, Po = 5.2W, RL = 4Ω
-
55
-
mV
f = 1kHz, Po = 8W, RL = 2Ω
-
50
-
mV
AC Characteristics (GV = 40dB)
Output Power
Input Saturation Voltage
Input Sensitivity
Po
d = 10%, f = 1kHz
Vi(rms)
Vi
f = 1kHz, Po = 0.5W
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)
Ri
f = 1kHz
70
150
-
kΩ
Voltage Gain (Open Loop)
GV
f = 1kHz, RL = 4Ω
-
80
-
dB
Voltage Gain (Closed Loop)
GV
f = 1kHz, RL = 4Ω
Input Noise Voltage
eN
Note 1
-
4
-
μV
Input Noise Current
iN
Note 1
-
60
-
pA
Efficiency
η
Po = 5.2W, RL = 4Ω
-
68
-
%
Po = 8W, RL = 2Ω
-
58
-
%
RL = 4Ω, Rg = 10kΩ, fripple = 100Hz
30
35
-
dB
Supply Voltage Rejection
SVR
Note 1. Filter with noise bandwidth: 22Hz to 22kHz.
39.5 40.0 40.5
f = 1kHz
dB
Pin Connection Diagram
Non-Invert Input
VCC
Invert Input
Output
GND
.408 (10.37
Max
0.45 (1.37) Max
.114 (2.9)
.619
(15.72)
Max
.896
(22.76)
Max
.364
(9.25)
Max
.850
(21.6)
Max
.135 (3.45)
.150 (3.81)
1
3
2
5
4
.182 (4.62) Max
.182 (4.62)
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