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LM4940TS/NOPB

更新时间： 2024-11-21 12:09:47
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德州仪器 - TI 商用集成电路放大器功率放大器
页数 文件大小 规格书
23页 1545K
描述
6W Stereo Audio Power Amplifier

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LM4940TS/NOPB 数据手册

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LM4940  
www.ti.com  
SNAS219C –OCTOBER 2003–REVISED MAY 2013  
LM4940  
6W Stereo Audio Power Amplifier  
Check for Samples: LM4940  
1
FEATURES  
DESCRIPTION  
The LM4940 is a dual audio power amplifier primarily  
designed for demanding applications in flat panel  
monitors and TVs. It is capable of delivering 6 watts  
per channel to a 4Ω load with less than 10% THD+N  
while operating on a 14.4VDC power supply.  
23  
•
Click and Pop Circuitry Eliminates Noise  
During Turn-On and Turn-Off Transitions  
•
•
•
•
•
•
Low Current, Active-Low Shutdown Mode  
Low Quiescent Current  
Stereo 6W Output, RL = 4Ω  
Short Circuit Protection  
Boomer™ audio power amplifiers were designed  
specifically to provide high quality output power with a  
minimal amount of external components. The  
LM4940 does not require bootstrap capacitors or  
snubber circuits. Therefore, it is ideally suited for  
display applications requiring high power and minimal  
size.  
Unity-Gain Stable  
External Gain Configuration Capability  
APPLICATIONS  
•
•
•
Flat Panel Monitors  
Flat Panel TVs  
The LM4940 features a low-power consumption  
active-low shutdown mode. Additionally, the LM4940  
features an internal thermal shutdown protection  
mechanism along with short circuit protection.  
Computer Sound Cards  
The LM4940 contains advanced pop and click  
circuitry that eliminates noises which would otherwise  
occur during turn-on and turn-off transitions.  
KEY SPECIFICATIONS  
•
•
•
Quiscent Power Supply Current: 40mA (max)  
(SE)  
The LM4940 is a unity-gain stable and can be  
configured by external gain-setting resistors.  
POUT  
VDD = 14.4V, RL = 4Ω, 10% THD+N: 6 W (typ)  
Shutdown Current: 40µA (typ)  
TYPICAL APPLICATION  
Figure 1. Typical Stereo Audio Amplifier Application Circuit  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
Boomer is a trademark of Texas Instruments, Inc.  
2
3
All other trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2003–2013, Texas Instruments Incorporated  
 
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LM4940TS/NOPB 替代型号

型号 品牌 替代类型 描述 数据表
LM4940TSX/NOPB TI

完全替代

 6W Stereo Audio Power Amplifier
LM4940TS/NOPB NSC

功能相似

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