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LM2876_00 Datasheet

  • LM2876_00

  • National Semiconductor [Overture Audio Power Amplifier Seri...

  • NSC

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LM2876
Overture
Audio Power Amplifier Series
High-Performance 40W Audio Power Amplifier w/Mute
August 2000
LM2876
Overture
鈩?/div>
Audio Power Amplifier Series
High-Performance 40W Audio Power Amplifier w/Mute
General Description
The LM2876 is a high-performance audio power amplifier
capable of delivering 40W of continuous average power to
an 8鈩?load with 0.1% THD+N from 20Hz鈥?0kHz.
The performance of the LM2876, utilizing its Self Peak In-
stantaneous Temperature (藲Ke) (SPiKe
鈩?/div>
) protection cir-
cuitry, puts it in a class above discrete and hybrid amplifiers
by providing an inherently, dynamically protected Safe Op-
erating Area (SOA).
SPiKe
protection means that these
parts are completely safeguarded at the output against ov-
ervoltage, undervoltage, overloads, including shorts to the
supplies, thermal runaway, and instantaneous temperature
peaks.
The LM2876 maintains an excellent signal-to-noise ratio of
greater than 95dB (min) with a typical low noise floor of
2.0碌V. It exhibits extremely low THD+N values of 0.06% at
the rated output into the rated load over the audio spectrum,
and provides excellent linearity with an IMD (SMPTE) typical
rating of 0.004%.
Features
n
n
n
n
n
n
n
40W continuous average output power into 8鈩?/div>
75W instantaneous peak output power capability
Signal-to-Noise Ratio
鈮?/div>
95 dB(min)
An input mute function
Output protection from a short to ground or to the
supplies via internal current limiting circuitry
Output over-voltage protection against transients from
inductive loads
Supply under-voltage protection, not allowing internal
biasing to occur when |V
EE
| + |V
CC
|
鈮?/div>
12V, thus
eliminating turn-on and turn-off transients
11-lead TO-220 package
Wide supply range 20V - 72V
n
n
Applications
n
n
n
n
n
Component stereo
Compact stereo
Self-powered speakers
Surround-sound amplifiers
High-end stereo TVs
Typical Application
01177501
* 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
Overture
鈩?/div>
and
SPiKe
鈩?/div>
Protection are trademarks of National Semiconductor Corporation.
漏 2004 National Semiconductor Corporation
DS011775
www.national.com

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