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LM2876

Overture

Audio Power Amplifier Series

High-Performance 40W Audio Power Amplifier w/Mute

August 1995

LM2876

Overture

鈩?/div>

Audio Power Amplifier Series

High-Performance 40W Audio Power Amplifier w/Mute

General Description

The LM2876 is a high-performance audio power amplifier

capable of delivering 40W of continuous average power to

an 8鈩?load with 0.1% (THD + N) from 20 Hz鈥?0 kHz.

The performance of the LM2876, utilizing its Self Peak In-

stantaneous Temperature (藲Ke) (SPiKe

鈩?/div>

) Protection Cir-

cuitry, puts it in a class above discrete and hybrid amplifiers

by providing an inherently, dynamically protected Safe Oper-

ating Area (SOA).

SPiKe

Protection means that these parts

are completely safeguarded at the output against overvolt-

age, undervoltage, overloads, including shorts to the sup-

plies, thermal runaway, and instantaneous temperature

peaks.

The LM2876 maintains an excellent Signal-to-Noise Ratio of

greater than 95 dB(min) with a typical low noise floor of

2.0 碌V. It exhibits extremely low (THD + N) values of 0.06%

at the rated output into the rated load over the audio spec-

trum, and provides excellent linearity with an IMD (SMPTE)

typical rating of 0.004%.

Features

40W continuous average output power into 8鈩?/div>

75W instantaneous peak output power capability

Signal-to-Noise Ratio

鈮?/div>

95 dB(min)

An input mute function

Output protection from a short to ground or to the

supplies via internal current limiting circuitry

n

Output over-voltage protection against transients from

inductive loads

n

Supply under-voltage protection, not allowing internal

biasing to occur when |V

EE

| + |V

CC

|

鈮?/div>

12V, thus

eliminating turn-on and turn-off transients

n

11-lead TO-220 package

n

Applications

n

Component stereo

Compact stereo

Self-powered speakers

Surround-sound amplifiers

High-end stereo TVs

Typical Application

DS011775-1

* Optional components dependent upon specific design requirements. Refer to the External Components Description section for a component functional

description.

FIGURE 1. Typical Audio Amplifier Application Circuit

Overture

鈩?/div>

and

SPiKe

鈩?/div>

Protection are trademarks of National Semiconductor Corporation.

漏 1999 National Semiconductor Corporation

DS011775

www.national.com

型號

版本

描述

廠商

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