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LM4730TA Datasheet

  • LM4730TA

  • National Semiconductor [Stereo 14W Audio Power Amplifier wi...

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  • NSC

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LM4730 Stereo 14W Audio Power Amplifier with Mute and Standby Modes
July 2003
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鈩?or 8鈩?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藲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
n
n
n
n
n
n
Output power into 4鈩?or 8鈩? 10% THD+N
14W (typ)
THD+N at 1kHz with 2 X 1W into 8鈩?/div>
0.02% (typ)
Mute Attenuation
85dB (typ)
PSRR with f
RIPPLE
= 120Hz, V
RIPPLE
= 1V
RMS
50dB (typ)
Slew Rate
18V/碌s (typ)
Standby Current (+/-17V)
3.5mA (typ)
Features
n
Minimal amount of external components necessary
n
Quiet fade-in/out mute mode
n
Low current Standby-mode
Applications
n
n
n
n
n
Audio
Audio
Audio
Audio
Audio
amplifier
amplifier
amplifier
amplifier
amplifier
for
for
for
for
for
high-end stereo TVs
component stereo
compact stereo
PC satellite speaker systems
self powered speakers
Connection Diagrams
Plastic Package
(Note 12)
TO-220 Top Marking (Note 12)
20059474
20059452
Top View
Non-Isolated Package
Order Number LM4730TA
See NS Package Number TA15A
Top View
U - Wafer Fab Code
Z - Assembly Plant Code
XY - Date Code
TT - Die Traceability
LM4730TA - LM4730TA
漏 2003 National Semiconductor Corporation
DS200594
www.national.com

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