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參數(shù)資料
| 型號(hào)： | LM4781 |
| 廠(chǎng)商： | National Semiconductor Corporation |
| 英文描述： | Overture⑩ Audio Power Amplifier Series 3 Channel 35W Audio Power Amplifier with Mute |
| 中文描述： | 序曲⑩音頻功率放大器系列三通道35W的音頻功率放大器靜音 |
| 文件頁(yè)數(shù)： | 1/25頁(yè) |
| 文件大?。?/td> | 1125K |
| 代理商： | LM4781 |
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LM4781
Overture
Audio Power Amplifier Series
3 Channel 35W Audio Power Amplifier with Mute
General Description
The LM4781 is a three channel audio amplifier capable of
typically delivering 35W per channel of continuous average
output power into an 8
load with less than 0.5% THD+N
from 20Hz - 20kHz.
The LM4781 is fully protected utilizing National’s Self Peak
Instantaneous Temperature (Ke) (SPiKe
TM
) protection cir-
cuitry. SPiKe provides a dynamically optimized Safe Operat-
ing Area (SOA). SPiKe protection completely safeguards the
LM4781’s outputs against over-voltage, under-voltage, over-
loads, shorts to the supplies or GND, thermal runaway and
instantaneous temperature peaks. The advanced protection
features of the LM4781 places it in a class above discrete
and hybrid amplifiers.
Each amplifier of the LM4781 has an independent smooth
transition fade-in/out mute.
The LM4781 can easily be configured for bridge or parallel
operation for higher power and bi-amp solutions.
Key Specifications
j
Output Power/Channel with 0.5% THD+N,
1kHz into 8
j
THD+N at 3 x 20W into 8
(20Hz - 20kHz) 0.2% (typ)
j
THD+N at 3 x 20W into 6
(20Hz - 20kHz) 0.3% (typ)
j
THD+N at 3 x 20W into 4
(20Hz - 20kHz) 0.5% (typ)
j
Mute Attenuation
j
PSRR
j
Slew Rate
35W (typ)
110dB (typ)
85dB (min)
9V/μs (typ)
Features
n
SPiKe Protection
n
Low external component count
n
Quiet fade-in/out mute mode
n
Wide supply range: 20V - 70V
n
Signal-to-Noise Ratio
≥
93dB (ref. to P
O
= 1W)
Applications
n
Audio amplifier for component stereo
n
Audio amplifier for compact stereo
n
Audio amplifier for self-powered speakers
n
Audio amplifier for high-end and HD TVs
Typical Application
SPiKe
Protection and
Overture
are trademarks of National Semiconductor Corporation.
200673B5
FIGURE 1. Typical Audio Amplifier Application Circuit
August 2003
L
3
2003 National Semiconductor Corporation
DS200673
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM4781TA | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4781TA/NOPB | 功能描述:音頻放大器 RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel |
| LM4781TABD | 功能描述:音頻 IC 開(kāi)發(fā)工具 LM4871 EVAL BOARD RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類(lèi)型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V |
| LM4781TABD/NOPB | 功能描述:音頻 IC 開(kāi)發(fā)工具 LM4781TABD EVAL MOD RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類(lèi)型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V |
| LM4782 | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:Overture Audio Power Amplifier Series 3 Channel 25W Audio Power Amplifier with Mute and Standby |
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