TLH7934

December 1994

LM2878 Dual 5 Watt Power Audio Amplifier

General Description

The LM2878 is a high voltage stereo power amplifier de-

signed to deliver 5Wchannel continuous into 8X loads The

amplifier is ideal for use with low regulation power supplies

due to the absolute maximum rating of 35V and its superior

power supply rejection The LM2878 is designed to operate

with a low number of external components and still provide

flexibility for use in stereo phonographs tape recorders and

AM-FM stereo receivers The flexibility of the LM2878 al-

lows it to be used as a power operational amplifier power

comparator or servo amplifier The LM2878 is internally

compensated for all gains greater than 10 and comes in an

11-lead single-in-line package (SIP) The package has been

redesigned resulting in the slightly degraded thermal char-

acteristics shown in the figure Device Dissipation vs Ambi-

ent Temperature

Features

Y

Wide operating range 6V – 32V

Y

5Wchannel output

Y

60 dB ripple rejection output referred

Y

70 dB channel separation output referred

Y

Low crossover distortion

Y

AC short circuit protected

Y

Internal thermal shutdown

Applications

Y

Stereo phonographs

Y

AM-FM radio receivers

Y

Power op amp power comparator

Y

Servo amplifiers

Typical Applications

TLH7934 – 1

of Bass Tone Control

Frequency Response

TLH7934 – 2

FIGURE 1 Stereo Phonograph Amplifier with Bass Tone Control

C1995 National Semiconductor Corporation

RRD-B30M115Printed in U S A