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 4

Ω 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-

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,

undervoltage, overloads, including thermal runaway and in-

stantaneous temperature peaks.

Key Specifications

output power into 4

Ω or 8Ω:

0.1% (max)

output power of 2 x 20W into 8

Ω:

0.009% (typ)

4.2mA (typ)

Features

n

SPiKe protection

n

Minimal amount of external components necessary

n

Quiet fade-in/out mute mode

n

Standby-mode

n

Isolated 15-lead TO-220 package

n

Non-Isolated 15-lead TO-220 package

n

Wide supply range 20V - 64V

Applications

n

High-end stereo TVs

n

Component stereo

n

Compact stereo

Connection Diagram

Plastic Package

01207202

Top View

Isolated Package

Order Number LM1876TF

See NS Package Number TF15B

Non-Isolated Package

Order Number LM1876T

See NS Package Number TA15A

July 2003

© 2003 National Semiconductor Corporation

DS012072

www.national.com