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LM3876_00

更新时间： 2024-01-27 06:48:48
品牌 Logo 应用领域
美国国家半导体 - NSC 放大器功率放大器
页数 文件大小 规格书
22页 1040K
描述
Audio Power Amplifier Series High-Performance 56W Audio Power Amplifier w/Mute

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August 2000  
™
LM3876 Overture  
Audio Power Amplifier Series  
High-Performance 56W Audio Power Amplifier w/Mute  
General Description  
Features  
n 56W continuous average output power into 8Ω  
n 100W instantaneous peak output power capability  
n Signal-to-Noise Ratio ≥ 95 dB(min)  
n An input mute function  
The LM3876 is a high-performance audio power amplifier  
capable of delivering 56W of continuous average power to  
an 8Ω load with 0.1% THD+N from 20Hz–20kHz.  
The performance of the LM3876, utilizing its Self Peak In-  
™
stantaneous Temperature (˚Ke) (SPiKe ) protection cir-  
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 |VEE| + |VCC| ≤ 12V, thus  
eliminating turn-on and turn-off transients  
n 11-lead TO-220 package  
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 LM3876 maintains an excellent signal-to-noise ratio of  
greater than 95dB (min) with a typical low noise floor of  
2.0µV. 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%.  
n Wide supply range 20V - 94V  
Applications  
n Component stereo  
n Compact stereo  
n Self-powered speakers  
n Surround-sound amplifiers  
n High-end stereo TVs  
Typical Application  
01183201  
*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 and SPiKe Protection are trademarks of National Semiconductor Corporation.  
© 2004 National Semiconductor Corporation  
DS011832  
www.national.com  
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