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LM4922TLX/NOPB PDF预览

LM4922TLX/NOPB

更新时间： 2024-01-30 10:29:13
品牌 Logo 应用领域
德州仪器 - TI 放大器商用集成电路
页数 文件大小 规格书
26页 1425K
描述
AUDIO AMPLIFIER

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LM4922TLX/NOPB 技术参数

是否Rohs认证： 符合生命周期：Obsolete
包装说明：FBGA, BGA14,4X4,20Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.33.00.01
Factory Lead Time：1 week风险等级：5.81
商用集成电路类型：AUDIO AMPLIFIERJESD-30 代码：S-PBGA-B14
JESD-609代码：e1湿度敏感等级：1
功能数量：2端子数量：14
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：FBGA
封装等效代码：BGA14,4X4,20封装形状：SQUARE
封装形式：GRID ARRAY, FINE PITCH峰值回流温度（摄氏度）：260
电源：3 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技术：CMOS
温度等级：INDUSTRIAL端子面层：Tin/Silver/Copper (Sn/Ag/Cu)
端子形式：BALL端子节距：0.5 mm
端子位置：BOTTOM处于峰值回流温度下的最长时间：NOT SPECIFIED
Base Number Matches：1

LM4922TLX/NOPB 数据手册

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NRND  
LM4922  
www.ti.com  
SNAS327E –NOVEMBER 2005–REVISED APRIL 2013  
LM4922 Boomer™ Audio Power Amplifier Series Ground-Referenced, Ultra Low Noise,  
Fixed Gain, 80mW Stereo Headphone Amplifier  
Check for Samples: LM4922  
1
FEATURES  
DESCRIPTION  
The LM4922 is a ground referenced, fixed-gain audio  
power amplifier capable of delivering 80mW of  
continuous average power into a 16Ω single-ended  
load with less than 1% THD+N from a 3V power  
supply.  
23  
•
Fixed Logic Levels  
•
•
•
•
•
Ground Referenced Outputs  
High PSRR  
Available in Space-Saving DSBGA Package  
Ultra Low Current Shutdown Mode  
The LM4922 features a new circuit technology that  
utilizes a charge pump to generate a negative  
reference voltage. This allows the outputs to be  
biased about ground, thereby eliminating output-  
coupling capacitors typically used with normal single-  
ended loads.  
Improved Pop and Click Circuitry Eliminates  
Noises During Turn-On and Turn-Off  
Transitions  
•
•
No Output Coupling Capacitors, Snubber  
Networks, Bootstrap Capacitors, or Gain-  
Setting Resistors Required  
The LM4922 features an Automatic Standby Mode  
circuitry (patent pending). In the absence of an input  
signal, after approximately 12 seconds, the LM4922  
goes into low current standby mode. The LM4922  
recovers into full power operating mode immediately  
after a signal is applied to either the left or right input  
pins. This feature saves power supply current in  
battery operated applications.  
Shutdown either channel independently  
APPLICATIONS  
•
•
•
•
•
Notebook PCs  
Mobile Phone  
PDAs  
Boomer audio power amplifiers were designed  
specifically to provide high quality output power with a  
minimal amount of external components. The  
LM4922 does not require output coupling capacitors  
or bootstrap capacitors, and therefore is ideally suited  
for mobile phone and other low voltage applications  
where minimal power consumption is a primary  
requirement.  
Portable Electronic Devices  
MP3 Players  
KEY SPECIFICATIONS  
•
•
Improved PSRR at 217Hz, 70dB (Typ)  
Power Output at VDD = 3V,  
RL = 16Ω, THD ≦ 1%, 80mW (Typ)  
The LM4922 features a low-power consumption  
shutdown mode selectable for either channel  
separately. This is accomplished by driving either the  
SD_RC (Shutdown Right Channel) or SD_LC  
(Shutdown Left Channel) (or both) pins with logic low,  
depending on which channel is desired shutdown.  
Additionally, the LM4922 features an internal thermal  
shutdown protection mechanism.  
•
•
•
Shutdown Current, 0.01µA (Typ)  
Internal Fixed Gain, 1.5V/V (Typ)  
Operating Voltage, 1.6V to 4.2V  
The LM4922 contains advanced pop and click  
circuitry that eliminates noises which would otherwise  
occur during turn-on and turn-off transitions.  
The LM4922 has an internal fixed gain of 1.5V/V.  
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 © 2005–2013, Texas Instruments Incorporated  
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