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General Description

The LM380 is a power audio amplifier for consumer applications.

In order to hold system cost to a minimum, gain is

internally fixed at 34 dB. A unique input stage allows ground

referenced input signals. The output automatically selfcenters

to one-half the supply voltage.

The output is short circuit proof with internal thermal limiting.

The package outline is standard dual-in-line. The LM380N

uses a copper lead frame. The center three pins on either

side comprise a heat sink. This makes the device easy to

use in standard PC layouts.

Uses include simple phonograph amplifiers, intercoms, line

drivers, teaching machine outputs, alarms, ultrasonic drivers,

TV sound systems, AM-FM radio, small servo drivers,

power converters, etc.

A selected part for more power on higher supply voltages is

available as the LM384. For more information see AN-69.

Features

n Wide supply voltage range: 10V-22V

n Low quiescent power drain: 0.13W (VS= 18V)

n Voltage gain fixed at 50

n High peak current capability: 1.3A

n Input referenced to GND

n High input impedance: 150kΩ

n Low distortion

n Quiescent output voltage is at one-half of the supply

voltage

n Standard dual-in-line package