Datasheet LM383T, LM383AT Datasheet (NSC)

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

Typical Performance Characteristics

Device Dissipation vs
Ambient Temperature

Open Loop Gain
vs Frequency

Output Power vs
Supply Voltage

Power Dissipation vs
Output Power

Supply Ripple Rejection
vs Frequency

Distortion vs Output Power Distortion vs Frequency

Power Dissipation vs
Output Power

Supply Current vs
Supply Voltage

Distortion vs Frequency Supply Voltage

Output Swing vs

3

TL/H/7145– 4

Typical Applications

Single Amplifier

TL/H/7145– 3

16W Bridge Amplifier

Component Layout

Single Amplifier

e

V

20V

S

e

R

4X

L

Heatsink from:

Staver Company

41 Saxon Ave.

P.O. Drawer H

Bay Shore, NY 11706

Tel: [phone] TL/H/7145– 6

4

TL/H/7145– 5

Physical Dimensions inches (millimeters)

LM383/LM383A 7W Audio Power Amplifier

Order Number LM383T or LM383AT

NS Package Number T05B

LIFE SUPPORT POLICY

NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL
SEMICONDUCTOR CORPORATION. As used herein:

1. Life support devices or systems are devices or 2. A critical component is any component of a life
systems which, (a) are intended for surgical implant support device or system whose failure to perform can
into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life
failure to perform, when properly used in accordance support device or system, or to affect its safety or
with instructions for use provided in the labeling, can effectiveness.
be reasonably expected to result in a significant injury
to the user.

National Semiconductor National Semiconductor National Semiconductor National Semiconductor
Corporation Europe Hong Kong Ltd. Japan Ltd.

1111 West Bardin Road Fax: (
Arlington, TX 76017 Email: [e-mail] Ocean Centre, 5 Canton Rd. Fax: [phone]
Tel: [phone] Deutsch Tel: (
Fax: [phone] English Tel: (

National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.

Fran3ais Tel: (
Italiano Tel: (

a

49) 0-180-530 85 86 13th Floor, Straight Block, Tel: [phone]

a

49) 0-180-530 85 85 Tsimshatsui, Kowloon

a

49) 0-180-532 78 32 Hong Kong

a

49) 0-180-532 93 58 Tel: [phone]

a

49) 0-180-534 16 80 Fax: [phone]