February 1995
LM1877
Dual Audio Power Amplifier
n Wide supply range, 6V–24V
n Very low cross-over distortion
n Low audio band noise
n AC short circuit protected
n Internal thermal shutdown
General Description
The LM1877 is a monolithic dual power amplifier designed to
deliver 2W/channel continuous into 8Ω loads. The LM1877 is
designed to operate with a low number of external compo-
nents, and still provide flexibility for use in stereo phono-
graphs, tape recorders and AM-FM stereo receivers, etc.
Each power amplifier is biased from a common internal regu-
lator to provide high power supply rejection, and output Q
point centering. The LM1877 is internally compensated for
all gains greater than 10.
Applications
n Multi-channel audio systems
n Stereo phonographs
n Tape recorders and players
n AM-FM radio receivers
n Servo amplifiers
Features
n 2W/channel
n −65 dB ripple rejection, output referred
n −65 dB channel separation, output referred
n Intercom systems
n Automotive products
Connection Diagram
Dual-In-Line Package
or Surface Mount Package
DS007913-1
Top View
Order Number LM1877M-9 or LM1877N-9
See NS Package Number M14B or N14A
© 1999 National Semiconductor Corporation
DS007913
www.national.com