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LM4670SDX/NOPB PDF预览

LM4670SDX/NOPB

更新时间： 2024-11-16 20:47:47
品牌 Logo 应用领域
德州仪器 - TI 放大器光电二极管商用集成电路
页数 文件大小 规格书
24页 1807K
描述
IC,AUDIO AMPLIFIER,SINGLE,LLCC,8PIN,PLASTIC

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LM4670SDX/NOPB 技术参数

是否Rohs认证： 符合生命周期：Obsolete
包装说明：SON, DILCC8,.46Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.33.00.01
风险等级：5.41商用集成电路类型：AUDIO AMPLIFIER
JESD-30 代码：R-PDSO-N8JESD-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：SON封装等效代码：DILCC8,.46
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
峰值回流温度（摄氏度）：260电源：3/5 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：NO LEAD端子节距：2.54 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
Base Number Matches：1

LM4670SDX/NOPB 数据手册

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LM4670  
www.ti.com  
SNAS240C –DECEMBER 2004–REVISED MAY 2013  
LM4670 Boomer™ Audio Power Amplifier Series Filterless High Efficiency 3W Switching  
Audio Amplifier  
Check for Samples: LM4670  
1
FEATURES  
DESCRIPTION  
The LM4670 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 external  
component count, simplifies circuit design, and  
reduces board area. The LM4670 processes analog  
inputs with a delta-sigma modulation technique that  
lowers output noise and THD when compared to  
conventional pulse width modulators.  
23  
•
No Output Filter Required for Inductive Loads  
Externally Configurable Gain  
•
•
•
•
•
•
•
Very Fast Turn on Time: 1.35ms (Typ)  
Minimum External Components  
"Click and Pop" Suppression Circuitry  
Micro-Power Shutdown Mode  
Short Circuit Protection  
Available in Space-Saving DSBGA and WSON  
Packages  
The LM4670 is designed to meet the demands of  
mobile phones and other portable communication  
devices. Operating on a single 5V supply, it is  
capable of driving a 4Ω speaker load at a continuous  
average output of 2.3W with less than 1% THD+N. Its  
flexible power supply requirements allow operation  
from 2.4V to 5.5V.  
APPLICATIONS  
•
•
•
Mobile Phones  
PDAs  
Portable Electronic Devices  
The LM4670 has high efficiency with speaker loads  
compared to a typical Class AB amplifier. With a 3.6V  
supply driving an 8Ω speaker, the IC's efficiency for a  
100mW power level is 77%, reaching 88% at 600mW  
output power.  
KEY SPECIFICATIONS  
•
•
•
Efficiency at 3.6V, 100mW into 8Ω Speaker,  
77% (Typ)  
Efficiency at 3.6V, 600mW into 8Ω Speaker,  
88% (Typ)  
The LM4670 features a low-power consumption  
shutdown mode. Shutdown may be enabled by  
driving the Shutdown pin to a logic low (GND).  
Efficiency at 5V, 1W into 8Ω Speaker, 87%  
(Typ)  
The gain of the LM4670 is externally configurable  
which allows independent gain control from multiple  
sources by summing the signals.  
•
•
Quiescent Current, 3.6V Supply, 4.8mA (Typ)  
Total Shutdown Power Supply Current, 0.01µA  
(Typ)  
•
Single Supply Range, 2.4 to 5.5V  
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.  
2
3
Boomer is a trademark of Texas Instruments.  
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 © 2004–2013, Texas Instruments Incorporated  
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