LM4700 Datasheet, PDF (1/15 Pages) National Semiconductor (TI) – Overture™ Audio Power Amplifier Series 30W Audio Power Amplifier with Mute and Standby Modes

March 1998
LM4700
Overture^™ Audio Power Amplifier Series
30W Audio Power Amplifier with
Mute and Standby Modes
General Description
The LM4700 is an audio power amplifier capable of deliver-
ing typically 30W of continuous average output power into an
8Ω load with less than 0.1% (THD + N).
The LM4700 has an independent smooth transition fade-in/
out mute and a power conserving standby mode which can
be controlled by external logic.
The performance of the LM4700, utilizing its Self Peak In-
stantaneous Temperature (˚Ke) (SPiKe™) Protection Cir-
cuitry, places it in a class above discrete and hybrid amplifi-
ers by providing an inherently, dynamically protected Safe
Operating Area (SOA). SPiKe Protection means that these
parts are completely safeguarded at the output against over-
voltage, undervoltage, overloads, including thermal runaway
and instantaneous temperature peaks.
Key Specifications
n THD+N at 1 kHz at continuous average output power of
25W into 8Ω:
0.1% (max)
n THD+N from 20 Hz to 20 kHz at 30W of continuous
average output power into 8Ω:
0.08% (typ)
n Standby current:
2.1 mA (typ)
Features
n SPiKe Protection
n Minimal amount of external components necessary
n Quiet fade-in/out mute function
n Power conserving standby-mode
n Isolated 11-lead TO-220 package
Applications
n Component stereo
n Compact stereo
Typical Application
Connection Diagram
Isolated Plastic Package
DS012369-1
*Optional components dependent upon specific design requirements. Refer
to the External Components Description section for a component functional
description.
FIGURE 1. Typical Audio Amplifier Application Circuit
SPiKe™ Protection and Overture™ are trademarks of National Semiconductor Corporation.
© 1999 National Semiconductor Corporation DS012369
DS012369-2
Top View
Order Number LM4700TF
See NS Package Number TF11B
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