LM4765| Datasheet

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LM4765 OvertureTM Audio Power Amplifier Series Dual 30W Audio Power Amplifier with Mute and Standby Modes

August 2000

LM4765 OvertureTM 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 load with less than 0.1% THD+N. Each amplifier has an independent smooth transition fadein/out mute and a power conserving standby mode which can be controlled by external logic. The performance of the LM4765, utilizing its Self Peak Instantaneous Temperature ( Ke) (SPiKeTM) protection circuitry, places it in a class above discrete and hybrid amplifiers 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 instantaneous temperature peaks.

Key Specifications
jTHD+N at 1kHz at 2 x 25W continuous average

output power into 8:
jTHD+N at 1kHz at continuous average

0.1% (max) 0.009% (typ) 6.5mA (typ)

output power of 2 x 30W into 8:
jStandby current:

Features
n n n n n n SPiKe Protection Minimal amount of external components necessary Quiet fade-in/out mute mode Standby-mode Non-Isolated 15-lead TO-220 package Wide supply range 20V - 66V

Applications
n High-end stereo TVs n Component stereo n Compact stereo

Typical Application

Connection Diagram
Plastic Package

10092702

Top View Non-Isolated Package Order Number LM4765T See NS Package Number TA15A
10092701

Numbers in parentheses represent pinout for amplifier B. *Optional component dependent upon specific design requirements.

FIGURE 1. Typical Audio Amplifier Application Circuit

SPiKeTM Protection and OvertureTM are trademarks of National Semiconductor Corporation.

2004 National Semiconductor Corporation

DS100927

www.national.com