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LM4888SQX/NOPB PDF预览

LM4888SQX/NOPB

更新时间： 2024-09-30 14:52:31
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
27页 688K
描述
IC,AUDIO AMPLIFIER,DUAL,LLCC,24PIN,PLASTIC

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LM4888SQX/NOPB 技术参数

是否Rohs认证：符合生命周期：Obsolete
包装说明：QCCN, LCC24,.16SQ,20Reach Compliance Code：compliant
风险等级：5.83Is Samacsys：N
商用集成电路类型：AUDIO AMPLIFIERJESD-30 代码：S-PQCC-N24
JESD-609代码：e3湿度敏感等级：1
功能数量：2端子数量：24
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：QCCN
封装等效代码：LCC24,.16SQ,20封装形状：SQUARE
封装形式：CHIP CARRIER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：0.5 mm
端子位置：QUADBase Number Matches：1

LM4888SQX/NOPB 数据手册

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OBSOLETE  
LM4888  
www.ti.com  
SNOSAF4D –JANUARY 2005–REVISED APRIL 2013  
LM4888  
Dual 2.1W Audio Amplifier Plus Stereo Headphone & 3D Enhancement  
Check for Samples: LM4888  
1
FEATURES  
DESCRIPTION  
The LM4888 is a dual bridge-connected audio power  
2
•
TI 3D Enhancement  
amplifier which, when connected to a 5V supply, will  
•
•
•
Selectable Headphone Enable Modes  
Stereo Headphone Amplifier Mode  
(1)  
(2)  
deliver 2.1W to a 4Ω load  
with less than 1.0% THD+N.  
or 2.4W to a 3Ω load  
Improved “Click and Pop” Suppression  
Circuitry  
A
user selectable “TI 3D Enhancement” mode  
provides enhanced stereo imaging.  
•
•
•
Thermal Shutdown Protection Circuitry  
PCB Area-Saving WQFN Package  
Micro Power Shutdown Mode  
The LM4888WQFN also has two separate HP  
(headphone) enable inputs, each having different  
logic level thresholds. Either HP enable input  
activates the single ended headphone mode and  
disables the BTL output mode. The HP Sense input is  
for use with a normal stereo headphone jack. The  
remaining input, HP Logic, accepts standard logic  
level thresholds.  
APPLICATIONS  
•
•
•
•
Cell Phones  
Multimedia Monitors  
Portable and Desktop Computers  
Portable Audio Systems  
Boomer audio power amplifiers were designed  
specifically to provide high quality output power from  
a surface mount package while requiring few external  
components. To simplify audio system design, the  
LM4888WQFN combines dual bridge speaker  
amplifiers and stereo headphone amplifiers on one  
chip.  
KEY SPECIFICATIONS  
•
PO at 1% THD+N, VDD = 5V:  
–
–
–
RL = 3Ω at 2.4W (typ)  
RL = 4Ω at 2.1W (typ)  
RL = 8Ω at 1.3W (typ)  
The  
LM4888WQFN  
features  
a
low-power  
consumption shutdown mode and thermal shutdown  
protection. It also utilizes circuitry to reduce “clicks  
and pops” during device turn-on.  
(1) An LM4888WQFN that has been properly mounted to a circuit  
board will deliver 2.1W into 4Ω. See the Application  
Information sections for further information concerning the  
LM4888WQFN.  
•
Single-Ended Mode THD+N at 75mW into  
32Ω (5V, 1kHz): 0.01% (typ)  
•
•
•
Shutdown Current: 0.04µA (typ)  
Supply Voltage Range: 2.7V to 5.5V  
PSRR at 217Hz: 85dB (typ)  
(2) An LM4888WQFN that has been properly mounted to a circuit  
board and forced-air cooled will deliver 2.4W into 3Ω.  
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
All 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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