LM4780 Datasheet

IC型號(hào)：
LM4780
PDF描述：
Audio Power Amplifier Series Stereo 60W, Mono 120W Audio Pow...
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1024.72KB
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24頁
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NSC

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LM4780 Overture

鈩?/div>

Audio Power Amplifier Series

Stereo 60W, Mono 120W Audio Power Amplifier with Mute

July 2003

LM4780

Overture

鈩?/div>

Audio Power Amplifier Series

Stereo 60W, Mono 120W Audio Power Amplifier with

Mute

General Description

The LM4780 is a stereo audio amplifier capable of typically

delivering 60W per channel of continuous average output

power into an 8鈩?load with less than 0.5% THD+N from

20Hz - 20kHz.

The LM4780 is fully protected utilizing National鈥檚 Self Peak

Instantaneous Temperature (藲Ke) (SPiKe

) protection cir-

cuitry. SPiKe provides a dynamically optimized Safe Operat-

ing Area (SOA). SPiKe protection completely safeguards the

LM4780鈥檚 outputs against over-voltage, under-voltage, over-

loads, shorts to the supplies or GND, thermal runaway and

instantaneous temperature peaks. The advanced protection

features of the LM4780 places it in a class above discrete

and hybrid amplifiers.

Each amplifier of the LM4780 has an independent smooth

transition fade-in/out mute.

The LM4780 can easily be configured for bridge or parallel

operation for 120W mono solutions.

Key Specifications

Output Power/Channel with 0.5% THD+N, 1kHz into

8鈩?/div>

60W (typ)

THD+N at 2 x 30W into 8鈩?(20Hz - 20kHz) 0.03% (typ)

THD+N at 2 x 30W into 6鈩?(20Hz - 20kHz) 0.05% (typ)

THD+N at 2 x 30W into 4鈩?(20Hz - 20kHz) 0.07% (typ)

Mute Attenuation

110dB (typ)

PSRR

85dB (min)

Slew Rate

19V/碌s (typ)

Features

SPiKe Protection

Low external component count

Quiet fade-in/out mute mode

Wide supply range: 20V - 84V

Signal-to-Noise Ratio

鈮?/div>

97dB (ref. to P

= 1W)

Applications

Audio

amplifier

for

component stereo

compact stereo

self-powered speakers

high-end and HD TVs

Typical Application

20058622

FIGURE 1. Typical Audio Amplifier Application Circuit

SPiKe

鈩?/div>

Protection and

Overture

鈩?/div>

are trademarks of National Semiconductor Corporation.

漏 2003 National Semiconductor Corporation

DS200586

www.national.com

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