LM4765

Audio Power Amplifier Series Dual 30W Audio Power

Amplifier with Mute and Standby Modes

General Description

The LM4765 is a stereo audio amplifier capable of delivering

typically 30W per channel of continuous average output

power into an 8

Ω 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 LM4765, 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, un-

dervoltage, overloads, including thermal runaway and in-

stantaneous temperature peaks.

Key Specifications

output power into 8

Ω:

0.1% (max)

output power of 2 x 30W into 8

Ω:

0.009% (typ)

6.5 mA (typ)

Features

n SPiKe Protection

n Minimal amount of external components necessary

n Quiet fade-in/out mute mode

n Standby-mode

n Non-Isolated 15-lead TO-220 package

Applications

n High-end stereo TVs

n Component stereo

n Compact stereo

Typical Application

Note: Numbers in parentheses represent pinout for amplifier B.

Connection Diagram

DS100927-1

FIGURE 1. Typical Audio Amplifier Application Circuit

Plastic Package

DS100927-2

Top View

Non-Isolated Package

Order Number LM4765T

See NS Package Number TA15A

August 1998

© 1999 National Semiconductor Corporation

DS100927

www.national.com