LM4730 datasheet(1/17 Pages) NSC | Stereo 14W Audio Power Amplifier with Mute and Standby Modes

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LM4730

Stereo 14W Audio Power Amplifier with Mute and

Standby Modes

General Description

The LM4730 is a stereo audio amplifier capable of delivering

typically 14W per channel of continuous average output

power into a 4

Ω or 8Ω load with less than 10% THD+N from

20Hz - 20kHz.

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 LM4730 has short circuit protection and a thermal shut

down feature that is activated when the die temperature

exceeds 150˚C. The LM4730 also has a under voltage lock

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

The LM4730 has a wide operating supply range from +/-10V

- +/-25V allowing for lower cost unregulated power supplies

to be used.

Key Specifications

Output power into 4

Ω or 8Ω, 10% THD+N

14W (typ)

THD+N at 1kHz with2X1W into 8

Ω

0.02% (typ)

Mute Attenuation

85dB (typ)

PSRR with f

RIPPLE = 120Hz, VRIPPLE =1VRMS 50dB (typ)

Slew Rate

18V/µs (typ)

Standby Current (+/-17V)

3.5mA (typ)

Features

Minimal amount of external components necessary

Quiet fade-in/out mute mode

Low current Standby-mode

Applications

Audio amplifier for high-end stereo TVs

Audio amplifier for component stereo

Audio amplifier for compact stereo

Audio amplifier for PC satellite speaker systems

Audio amplifier for self powered speakers

Connection Diagrams

Plastic Package (Note 12)

TO-220 Top Marking (Note 12)

20059452

Top View

Non-Isolated Package

Order Number LM4730TA

See NS Package Number TA15A

20059474

Top View

U - Wafer Fab Code

Z - Assembly Plant Code

XY - Date Code

TT - Die Traceability

LM4730TA - LM4730TA

July 2003

DS200594

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