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LM4905MM

更新时间： 2024-02-29 14:10:03
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
17页 683K
描述
1 Watt Audio Power Amplifier

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中文翻译

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LM4905MM 技术参数

是否Rohs认证： 符合生命周期：Obsolete
包装说明：TSSOP, TSSOP8,.19Reach Compliance Code：compliant
风险等级：5.84商用集成电路类型：AUDIO AMPLIFIER
JESD-30 代码：R-PDSO-G8JESD-609代码：e3
湿度敏感等级：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封装主体材料：PLASTIC/EPOXY
封装代码：TSSOP封装等效代码：TSSOP8,.19
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
电源：2.5/5 V认证状态：Not Qualified
子类别：Audio/Video Amplifiers最大压摆率：10 mA
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：0.635 mm端子位置：DUAL

LM4905MM 数据手册

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July 2003  
LM4905  
1 Watt Audio Power Amplifier  
General Description  
Key Specifications  
The LM4905 is an audio power amplifier primarily designed  
for demanding applications in mobile phones and other por-  
table communication device applications. It is capable of  
delivering 1 watt of continuous average power to an 8Ω BTL  
load with less than 1% distortion (THD+N) from a 5VDC  
power supply.  
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Improved PSRR at 217Hz & 1KHz  
Power Output at 5.0V, 1% THD, 8Ω  
Power Output at 3.0V, 1% THD, 8Ω  
Shutdown Current  
62dB  
1.07W (typ)  
390mW (typ)  
0.1µA (typ)  
Boomer audio power amplifiers were designed specifically to  
provide high quality output power with a minimal amount of  
external components. The LM4905 does not require output  
coupling capacitors or bootstrap capacitors, and therefore is  
ideally suited for mobile phone and other low voltage appli-  
cations where minimal power consumption is a primary re-  
quirement.  
Features  
n Available in space-saving LLP package  
n Ultra low current shutdown mode  
n BTL output can drive capacitive loads  
n Improved pop & click circuitry eliminates noise during  
turn-on and turn-off transitions  
The LM4905 features a low-power consumption shutdown  
mode, which is achieved by driving the shutdown pin with  
logic low. Additionally, the LM4905 features an internal ther-  
mal shutdown protection mechanism.  
n 2.2 - 5.5V operation  
n No output coupling capacitors, snubber networks or  
bootstrap capacitors required  
n Unity-gain stable  
n External gain configuration capability  
The LM4905 contains advanced pop & click circuitry which  
eliminates noise which would otherwise occur during turn-on  
and turn-off transitions.  
Applications  
n Mobile Phones  
n PDAs  
The LM4905 is unity-gain stable and can be configured by  
external gain-setting resistors.  
n Portable electronic devices  
Typical Application  
200508D3  
FIGURE 1. Typical Audio Amplifier Application Circuit  
Boomer® is a registered trademark of National Semiconductor Corporation.  
© 2003 National Semiconductor Corporation  
DS200508  
www.national.com  
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LM4905MM 替代型号

型号 品牌 替代类型 描述 数据表
LM4905MM/NOPB TI

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