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LM4991

更新时间： 2024-01-13 06:15:02
品牌 Logo 应用领域
德州仪器 - TI /
页数 文件大小 规格书
22页 989K
描述
3W Audio Power Amplifier with Shutdown Mode

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LM4991 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active零件包装代码：SOIC
包装说明：SOP, SOP8,.25针数：8
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.33.00.01风险等级：0.86
标称带宽：20 kHz商用集成电路类型：AUDIO AMPLIFIER
谐波失真：1%JESD-30 代码：R-PDSO-G8
JESD-609代码：e3长度：4.9 mm
湿度敏感等级：1信道数量：1
功能数量：1端子数量：8
最高工作温度：85 °C最低工作温度：-40 °C
标称输出功率：1.3 W封装主体材料：PLASTIC/EPOXY
封装代码：SOP封装等效代码：SOP8,.25
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
峰值回流温度（摄氏度）：260电源：2.6/5 V
认证状态：Not Qualified座面最大高度：1.75 mm
子类别：Audio/Video Amplifiers最大压摆率：10 mA
最大供电电压 (Vsup)：5.5 V最小供电电压 (Vsup)：2.2 V
表面贴装：YES温度等级：INDUSTRIAL
端子面层：Matte Tin (Sn)端子形式：GULL WING
端子节距：1.27 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：3.9 mm
Base Number Matches：1

LM4991 数据手册

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LM4991  
www.ti.com  
SNAS217A –MAY 2004–REVISED APRIL 2013  
LM4991  
3W Audio Power Amplifier with Shutdown Mode  
Check for Samples: LM4991  
1
FEATURES  
DESCRIPTION  
The LM4991 is a mono bridged audio power amplifier  
capable of delivering 3W of continuous average  
power into a 3Ω load with less than 10% THD when  
powered by a 5V power supply (see Note below). To  
conserve power in portable applications, the  
LM4991's micropower shutdown mode (ISD = 0.1µA,  
typ) is activated when VDD is applied to the  
SHUTDOWN pin.  
2
•
Available in Space-Saving WSON and SOIC  
Packages  
•
•
•
Ultra Low Current Shutdown Mode  
Can Drive Capacitive Loads up to 500pF  
Improved Click and Pop Circuitry Reduces  
Noises During Turn-On and Turn-Off  
Transitions  
Boomer audio power amplifiers are designed  
specifically to provide high power, high fidelity audio  
output. They require few external components and  
operate on low supply voltages from 2.2V to 5.5V.  
Since the LM4991 does not require output coupling  
capacitors, bootstrap capacitors, or snubber  
networks, it is ideally suited for low-power portable  
systems that require minimum volume and weight.  
•
•
2.2 - 5.5V Operation  
No Output Coupling Capacitors, Snubber  
Networks, Bootstrap Capacitors or Gain-  
Setting Resistors Required  
•
Unity-Gain Stable  
APPLICATIONS  
Additional LM4991 features include thermal shutdown  
protection, unity-gain stability, and external gain set.  
•
•
•
•
Wireless and Cellular Handsets  
PDAs  
Note: An LM4991LD that has been properly mounted  
to a circuit board will deliver 3W into 3Ω (at 10%  
THD). The other package options for the LM4991 will  
deliver 1.5W into 8Ω (at 10% THD). See the  
Portable Computers  
Desktop Computers  
KEY SPECIFICATIONS  
Application  
information  
LM4991M.  
Information  
concerning  
sections  
the LM4991LD  
for  
further  
and  
•
Improved PSRR at 217kHz and 1kHz: 64 dB  
(typ)  
•
PO at VDD = 5.0V, 10% THD, 1kHz  
–
LM4991LD (only), 3Ω, 4Ω: 3W (typ), 2.5 W  
(typ)  
–
All packages, 8Ω load: 1.5 W (typ)  
•
Shutdown current: 0.1µA (typ)  
Connection Diagrams  
Top View  
Top View  
Figure 1. SOIC Package  
See Package Number D0008A  
Figure 2. WSON Package  
See Package Number NGN0008A  
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.  
All trademarks are the property of their respective owners.  
2
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 © 2004–2013, Texas Instruments Incorporated  
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