lm2876t National Semiconductor Corporation, lm2876t Datasheet

lm2876t

Manufacturer Part Number

lm2876t

Description

Overture? Audio Power Amplifier Series High-performance 40w Audio Power Amplifier W/mute

Manufacturer

National Semiconductor Corporation

Datasheet

1.LM2876T.pdf (22 pages)

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LM2876

Overture

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 8Ω load with 0.1% THD+N from 20Hz–20kHz.

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

stantaneous Temperature (˚Ke) (SPiKe

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

by providing an inherently, dynamically protected Safe Op-

erating Area (SOA). SPiKe protection means that these

parts are completely safeguarded at the output against ov-

ervoltage, undervoltage, overloads, including shorts to the

supplies, thermal runaway, and instantaneous temperature

peaks.

The LM2876 maintains an excellent signal-to-noise ratio of

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

2.0µV. It exhibits extremely low THD+N values of 0.06% at

the rated output into the rated load over the audio spectrum,

and provides excellent linearity with an IMD (SMPTE) typical

rating of 0.004%.

Typical Application

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

description.

Overture

™

and SPiKe

™

Protection are trademarks of National Semiconductor Corporation.

™

Audio Power Amplifier Series

FIGURE 1. Typical Audio Amplifier Application Circuit

DS011775

™

) protection cir-

Features

n 40W continuous average output power into 8Ω

n 75W instantaneous peak output power capability

n Signal-to-Noise Ratio ≥ 95 dB(min)

n An input mute function

n Output protection from a short to ground or to the

n Output over-voltage protection against transients from

n Supply under-voltage protection, not allowing internal

n 11-lead TO-220 package

n Wide supply range 20V - 72V

Applications

n Component stereo

n Compact stereo

n Self-powered speakers

n Surround-sound amplifiers

n High-end stereo TVs

supplies via internal current limiting circuitry

inductive loads

biasing to occur when |V

eliminating turn-on and turn-off transients

01177501

| + |V

| ≤ 12V, thus

www.national.com

August 2000

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