NSC LM383T, LM383AT Datasheet
LM383/LM383A 7W Audio Power Amplifier
LM383/LM383A 7W Audio Power Amplifier
February 1995
General Description
The LM383 is a cost effective, high power amplifier suited
for automotive applications. High current capability (3.5A)
enables the device to drive low impedance loads with low
distortion. The LM383 is current limited and thermally protected. High voltage protection is available (LM383A) which
enables the amplifier to withstand 40V transients on its supply. The LM383 comes in a 5-pin TO-220 package.
Equivalent Schematic
Features
Y
High peak current capability (3.5A)
Y
Large output voltage swing
Y
Externally programmable gain
Y
Wide supply voltage range (5V–20V)
Y
Few external parts required
Y
Low distortion
Y
High input impedance
Y
No turn-on transients
Y
High voltage protection available (LM383A)
Y
Low noise
Y
AC short circuit protected
TL/H/7145– 1
Connection Diagram
Plastic Package
Order Number LM383T or LM383AT
See NS Package Number T05B
C
1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.
TL/H/7145
TL/H/7145– 2
Absolute Maximum Ratings
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Peak Supply Voltage (50 ms)
LM383A (Note 2) 40V
LM383 25V
Operating Supply Voltage 20V
Output Current
Repetitive 3.5A
Non-repetitive 4.5A
Input Voltage
g
0.5V
Power Dissipation (Note 3) 15W
Operating Temperature 0§Ctoa70§C
b
Storage Temperature
60§Ctoa150§C
Lead Temperature (Soldering, 10 sec.) 260§C
Electrical Characteristics V
S
e
14.4V, T
TAB
e
25§C, A
e
100 (40 dB), R
V
e
4X, unless otherwise specified
L
Parameter Conditions Min Typ Max Units
DC Output Level 6.4 7.2 8 V
Quiescent Supply Current Excludes Current in Feedback Resistors 45 80 mA
Supply Voltage Range 5 20 V
Input Resistance 150 kX
Bandwidth Gaine40 dB 30 kHz
Output Power V
THD P
Ripple Rejection R
Input Noise Voltage R
Input Noise Current R
Note 1: A 0.2 mF capacitor in series with a 1X resistor should be placed as close as possible to pins 3 and 4 for stability.
Note 2: The LM383 shuts down above 25V.
Note 3: For operating at elevated temperatures, the device must be derated based on a 150
junction to case.
e
13.2V, fe1 kHz
S
e
R
4X, THDe10% 4.7 W
L
e
R
2X, THDe10% 7.2 W
L
e
V
13.8V, fe1 kHz
S
e
R
4X, THDe10% 5.1 W
L
e
R
2X, THDe10% 7.8 W
L
e
V
14.4V, fe1 kHz
S
e
R
4X, THDe10% 4.8 5.5 W
L
e
R
2X, THDe10% 7 8.6 W
L
e
R
1.6X, THDe10% 9.3 W
L
e
V
16V, fe1 kHz
S
e
R
4X, THDe10% 7 W
L
e
R
2X, THDe10% 10.5 W
L
e
R
1.6X, THDe10% 11 W
L
e
o
e
P
o
e
S
e
R
S
e
S
e
S
e
2W, R
4W, R
4X,fe1 kHz 0.2 %
L
e
2X,fe1 kHz 0.2 %
L
50X,fe100 Hz 30 40 dB
50X,fe1 kHz 44 dB
0, 15 kHz Bandwidth 2 mV
100 kX, 15 kHz Bandwidth 40 pA
C maximum junction temperature and a thermal resistance of 4§C/W
§
2
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