LM4734 Datasheet

IC型號(hào)：
LM4734
PDF描述：
3 Channel 20W Audio Power Amplifier with Mute and Standby
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LM4734 3 Channel 20W Audio Power Amplifier with Mute and Standby

February 2004

LM4734

3 Channel 20W Audio Power Amplifier with Mute and

Standby

General Description

The LM4734 is a three channel audio amplifier capable of

typically delivering 20W per channel of continuous average

output power into a 4鈩?or 8鈩?load with less than 10%

THD+N from 20Hz - 20kHz.

The LM4734 has short circuit protection and a thermal shut

down feature that is activated when the die temperature

exceeds 150藲C. The LM4734 also has an under voltage lock

out feature for click and pop free power on and off.

Each amplifier of the LM4734 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 LM4734 has a wide supply operating supply range from

鹵

10V -

鹵

30V allowing for lower cost unregulated power

supplies to be used.

The LM4734 can easily be configured for bridge or parallel

operation for higher power and bi-amp solutions.

Key Specifications

Output Power/Channel with 10% THD+N,

1kHz into 4鈩?or 8鈩?/div>

THD+N at 3x1W into 8鈩? 1kHz

Mute Attenuation

PSRR

Slew Rate

20W (typ)

0.03% (typ)

110dB (typ)

64dB (typ)

18V/碌s (typ)

Features

Low external component count

Quiet fade-in/out mute mode

Low power standby mode

Wide supply range: 20V - 60V

Applications

Audio

amplifier

for

component stereo

compact stereo

home theater in a box (HTB)

high-end and HD TVs

Typical Application

200898D2

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

DS200898

www.national.com

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