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LM4666SD

更新时间： 2024-11-25 22:36:55
品牌 Logo 应用领域
美国国家半导体 - NSC 开关音频放大器
页数 文件大小 规格书
15页 639K
描述
Filterless High Efficiency Stereo 1.2W Switching Audio Amplifier

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中文翻译

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LM4666SD 技术参数

是否Rohs认证： 不符合生命周期：Transferred
包装说明：LLP-14Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.33.00.01
风险等级：5.19标称带宽：22 kHz
商用集成电路类型：AUDIO AMPLIFIER增益：6 dB
谐波失真：1%JESD-30 代码：R-XDSO-N14
JESD-609代码：e0长度：4 mm
湿度敏感等级：1信道数量：2
功能数量：1端子数量：14
最高工作温度：85 °C最低工作温度：-40 °C
标称输出功率：1.2 W封装主体材料：UNSPECIFIED
封装代码：HVSON封装等效代码：SOLCC14,.12,20
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：260电源：3/5 V
认证状态：Not Qualified座面最大高度：0.8 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)：2.8 V
表面贴装：YES温度等级：INDUSTRIAL
端子面层：Tin/Lead (Sn/Pb)端子形式：NO LEAD
端子节距：0.5 mm端子位置：DUAL
处于峰值回流温度下的最长时间：40宽度：3 mm
Base Number Matches：1

LM4666SD 数据手册

 浏览型号LM4666SD的Datasheet PDF文件第2页浏览型号LM4666SD的Datasheet PDF文件第3页浏览型号LM4666SD的Datasheet PDF文件第4页浏览型号LM4666SD的Datasheet PDF文件第5页浏览型号LM4666SD的Datasheet PDF文件第6页浏览型号LM4666SD的Datasheet PDF文件第7页 
May 2004  
LM4666  
Filterless High Efficiency Stereo 1.2W Switching Audio  
Amplifier  
General Description  
Key Specifications  
The LM4666 is a fully integrated single-supply high efficiency  
switching audio amplifier. It features an innovative modulator  
that eliminates the LC output filter used with typical switching  
amplifiers. Eliminating the output filter reduces parts count,  
simplifies circuit design, and reduces board area. The  
LM4666 processes analog inputs with a delta-sigma modu-  
lation technique that lowers output noise and THD when  
compared to conventional pulse width modulators.  
j
Efficiency at 3V, 100mW into 8Ω transducer 79% (typ)  
j
Efficiency at 3V, 450mW into 8Ω transducer 84% (typ)  
j
Efficiency at 5V, 1W into 8Ω transducer  
Total quiescent power supply current  
Total shutdown power supply current  
Single supply range  
85% (typ)  
7.0mA (typ)  
0.02µA (typ)  
2.8V to 5.5V  
j
j
j
The LM4666 is designed to meet the demands of mobile  
phones and other portable communication devices. Operat-  
ing on a single 3V supply, it is capable of driving 8Ω trans-  
ducer loads at a continuous average output of 450mW with  
less than 1%THD+N. Its flexible power supply requirements  
allow operation from 2.8V to 5.5V.  
Features  
n No output filter required for inductive transducers  
n Selectable gain of 6dB or 12dB  
n Very fast turn on time: 6ms (typ)  
n Minimum external components  
n "Click and pop" suppression circuitry  
n Micro-power shutdown mode  
The LM4666 has high efficiency with an 8Ω transducer load  
compared to a typical Class AB amplifier. With a 3V supply,  
the IC’s efficiency for a 100mW power level is 79%, reaching  
84% at 450mW output power.  
n Short circuit protection  
The LM4666 features a low-power consumption shutdown  
mode. Shutdown may be enabled by driving the Shutdown  
pin to a logic low (GND).  
n Available in space-saving SDA package  
Applications  
n Mobile phones  
n PDAs  
The LM4666 has fixed selectable gain of either 6dB or 12dB.  
The LM4666 has short circuit protection against a short from  
the outputs to VDD or GND.  
n Portable electronic devices  
Typical Application  
200558E6  
FIGURE 1. Typical Audio Amplifier Application Circuit  
Boomer® is a registered trademark of National Semiconductor Corporation.  
© 2004 National Semiconductor Corporation  
DS200558  
www.national.com  
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