L4782TA Datasheet

IC型號(hào)：
L4782TA
PDF描述：
3 Channel 25W Audio Power Amplifier with Mute and Standby
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1151.34KB
PDF頁(yè)數(shù)：
26頁(yè)
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NSC

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LM4782 Overture

鈩?/div>

Audio Power Amplifier Series

3 Channel 25W Audio Power Amplifier with Mute and Standby

February 2004

LM4782

Overture

鈩?/div>

Audio Power Amplifier Series

3 Channel 25W Audio Power Amplifier with Mute and

Standby

General Description

The LM4782 is a three channel audio amplifier capable of

typically delivering 25W per channel of continuous average

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

from 20Hz - 20kHz.

The LM4782 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

LM4782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 LM4782 places it in a class above discrete

and hybrid amplifiers.

Each amplifier of the LM4782 has an independent smooth

transition fade-in/out mute and a power conserving standby

mode. The mute and standby modes can be controlled by

external logic.

The LM4782 can easily be configured for bridge or parallel

operation for higher power and bi-amp solutions.

Key Specifications

Output Power/Channel with 0.5% THD+N,

1kHz into 8鈩?/div>

THD+N at 3x15W into 8鈩?(20Hz - 20kHz)

THD+N at 3x15W into 6鈩?(20Hz - 20kHz)

THD+N at 3x15W into 4鈩?(20Hz - 20kHz)

Mute Attenuation

PSRR

Slew Rate

25W (typ)

0.2% (typ)

0.3% (typ)

0.4% (typ)

115dB (typ)

85dB (min)

18V/碌s (typ)

Features

SPiKe Protection

Low external component count

Quiet fade-in/out mute mode

Low power standby mode

Wide supply range: 20V - 64V

Signal-to-Noise Ratio

鈮?/div>

98dB (ref. to P

= 1W)

Applications

Audio

amplifier

for

component stereo

compact stereo

home theater in a box (HTB)

self-powered speakers

high-end and HD TVs

Typical Application

200811D2

FIGURE 1. Typical Audio Amplifier Application Circuit

SPiKe

鈩?/div>

Protection and

Overture

鈩?/div>

are trademarks of National Semiconductor Corporation.

漏 2004 National Semiconductor Corporation

DS200811

www.national.com

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