NSC LM383A, LM383 Datasheet

LM383/LM383A
7W Audio Power Amplifier

March 1997

LM383/LM383A 7W Audio Power Amplifier

LM383/LM383A

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. TheLM383iscurrentlimitedand 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

n High peak current capability (3.5A)
n Large output voltage swing
n Externally programmable gain
n Wide supply voltage range (5V–20V)
n Few external parts required
n Low distortion
n High input impedance
n No turn-on transients
n High voltage protection available (LM383A)
n Low noise
n AC short circuit protected

Connection Diagram

Plastic Package

DS007145-2

Order Number LM383T or LM383AT

See NS Package Number T05D

© 1997 National Semiconductor Corporation DS007145 http:\\www.national.com

PrintDate=1997/04/01 PrintTime=11:52:16 7152 ds007145 Rev. No. 1

Proof 1

DS007145-1

1

Absolute Maximum Ratings (Note *NO

TARGET FOR FNXref NS0064*),

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

Repetitive 3.5A
Non-repetitive 4.5A

Input Voltage

±

Power Dissipation (Note 3) 15W
Operating Temperature 0˚C to +70˚C
Storage Temperature −60˚C to +150˚C
Lead Temperature

(Soldering, 10 sec.) 260˚C
Operating Supply Voltage 20V
Output Current

Electrical Characteristics

=

V

14.4V, T

S

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 kΩ
Bandwidth Gain=40 dB 30 kHz
Output Power V

THD P

Ripple Rejection R

Input Noise Voltage R
Input Noise Current R

Note 1: A 0.2 µF capacitor in series with a 1Ω 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˚C maximum junction temperature and a thermal resistance of 4˚C/W

junction to case.

TAB

=

25˚C, A

=

100 (40 dB), R

V

=

13.2V, f=1 kHz

S

=

R

4Ω, THD=10

L

=

R

2Ω, THD=10

L

=

V

13.8V, f=1 kHz

S

=

R

4Ω, THD=10

L

=

R

2Ω, THD=10

L

=

V

14.4V, f=1 kHz

S

=

R

4Ω, THD=10

L

=

R

2Ω, THD=10

L

=

R

1.6Ω, THD=10

L

=

V

16V, f=1 kHz

S

=

R

4Ω, THD=10

L

=

R

2Ω, THD=10

L

=

R

1.6Ω, THD=10

L

=

2W, R

o

P

o
S

R

S
S
S

L

=

4W, R

L

=

50Ω,f=100 Hz 30 40 dB

=

50Ω,f=1 kHz 44 dB

=

0, 15 kHz Bandwidth 2 µV

=

100 kΩ, 15 kHz Bandwidth 40 pA

=

4Ω, unless otherwise specified

L

%
%

%
%

%
%

4.8 5.5 W
7 8.6 W

%

%
%

%

=

4Ω,f=1 kHz 0.2

=

2Ω,f=1 kHz 0.2

4.7 W

7.2 W

5.1 W

7.8 W

9.3 W

7W

10.5 W
11 W

%
%

0.5V

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