參數(shù)資料
型號: LM3875T/NOPB
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 音頻/視頻放大
英文描述: 56 W, 1 CHANNEL, AUDIO AMPLIFIER, PZFM11
封裝: LEAD FREE, PLASTIC, TO-220, 11 PIN
文件頁數(shù): 1/20頁
文件大小: 1006K
代理商: LM3875T/NOPB
LM3875 Overture Audio Power Amplifier Series
High-Performance 56W Audio Power Amplifier
General Description
The LM3875 is a high-performance audio power amplifier
capable of delivering 56W of continuous average power to
an 8
load with 0.1% THD+N from 20Hz to 20kHz.
The performance of the LM3875, utilizing its Self Peak In-
stantaneous Temperature (Ke) (SPiKe) 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, caused by shorts to the
supplies, thermal runaway, and instantaneous temperature
peaks.
The LM3875 maintains an excellent signal-to-noise ratio of
greater than 95dB(min) with a typical low noise floor of
2.0V. 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
56W continuous average output power into 8
n
100W instantaneous peak output power capability
n
Signal-to-Noise Ratio >95dB (min)
n
Output protection from a short to ground or to the
supplies via internal current limiting circuitry
n
Output over-voltage protection against transients from
inductive loads
n
Supply under-voltage protection, not allowing internal
biasing to occur when |V+| + |V|
≤ 12V, thus eliminating
turn-on and turn-off transients
n
11 lead TO-220 package
n
Wide supply voltage range: |V+| + |V| = 20V to 84V
Applications
n
Component or compact stereos
n
Self-powered speakers
n
Surround-sound amplifiers
n
High-end stereo TVs
Typical Application
Overture and SPiKe are trademarks of National Semiconductor Corporation.
01144901
*Optional components dependent upon specific design requirements. Refer to the External Components Description section for a component function
description.
FIGURE 1. Typical Audio Amplifier Application Circuit
August 2000
LM3875
Overture
Audio
Power
Amplifier
Series
High-Performance
56W
Audio
Power
Amplifier
2004 National Semiconductor Corporation
DS011449
www.national.com
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