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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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相关PDF资料
LM399AH-20#TRPBF 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 6.95 V, MBCY4
LM399AH-50#TR 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 6.95 V, MBCY4
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LM399AH-50#PBF 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 6.95 V, MBCY4
LM199AH-20#PBF 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 6.95 V, MBCY4
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LM399AH#TR 1-OUTPUT TWO TERM VOLTAGE REFERENCE, 6.95 V, MBCY4
相关代理商/技术参数
LM3875TF 功能描述:音频放大器 RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel
LM3875TF/NOPB 功能描述:音频放大器 RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel
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LM3876_00 制造商:NSC 制造商全称:National Semiconductor 功能描述:Audio Power Amplifier Series High-Performance 56W Audio Power Amplifier w/Mute
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LM3876T 功能描述:音频放大器 RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel
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