LM1876 Overture
™
Audio Power Amplifier Series
Dual 20W Audio Power Amplifier with Mute and Standby Modes
February 1998
LM1876
Overture
™
Audio Power Amplifier Series
Dual 20W Audio Power Amplifier with Mute and Standby
Modes
General Description
The LM1876 is a stereo audio amplifier capable of delivering
typically 20W per channel of continuous average output
power into a 4Ω or 8Ω load with less than 0.1% (THD + N).
Each amplifier has an independent smooth transition fade-in/
out mute and a power conserving standby mode which can
be controlled by external logic.
The performance of the LM1876, utilizing its Self Peak In-
stantaneous Temperature (˚Ke) (SPiKe
™
) Protection Cir-
cuitry, places it in a class above discrete and hybrid amplifi-
ers by providing an inherently, dynamically protected Safe
Operating Area (SOA).
SPiKe
Protection means that these
parts are safeguarded at the output against overvoltage, un-
dervoltage, overloads, including thermal runaway and in-
stantaneous temperature peaks.
Key Specifications
j
j
j
THD+N at 1 kHz at 2 x 15W continuous average
output power into 4Ω or 8Ω:
THD+N at 1 kHz at continuous average
output power of 2 x 20W into 8Ω:
Standby current:
0.009% (typ)
4.2 mA (typ)
0.1% (max)
Features
n
n
n
n
n
n
SPiKe Protection
Minimal amount of external components necessary
Quiet fade-in/out mute mode
Standby-mode
Isolated 15-lead TO-220 package
Non-Isolated 15-lead TO-220 package
Applications
n
High-end stereo TVs
n
Component stereo
n
Compact stereo
Typical Application
Connection Diagram
Plastic Package
DS012072-2
DS012072-1
FIGURE 1. Typical Audio Amplifier Application Circuit
Note:
Numbers in parentheses represent pinout for amplifier B.
*
Optional component dependent upon specific design requirements.
Top View
Isolated Package
Order Number LM1876TF
See NS Package Number TF15B
Non-Isolated Package
Order Number LM1876T
See NS Package Number TA15A
SPiKe
™
Protection and
Overture
™
are trademarks of National Semiconductor Corporation.
© 1999 National Semiconductor Corporation
DS012072
www.national.com
NSC [ NATIONAL SEMICONDUCTOR ]
