LM380_00 Datasheet, PDF (1/9 Pages) National Semiconductor (TI) – 2.5W Audio Power Amplifier

August 2000
LM380
2.5W Audio Power Amplifier
General Description
The LM380 is a power audio amplifier for consumer applica-
tions. 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 self-
centers 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 driv-
ers, 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 (V_S= 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
Connection Diagrams (Dual-In-Line Packages, Top View)
00697701
Order Number LM380N
See NS Package Number N14A
Order Number LM380N-8
See NS Package Number N08E
00697702
© 2004 National Semiconductor Corporation DS006977
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