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LP55271TLX

更新时间： 2024-01-07 09:28:52
品牌 Logo 应用领域
美国国家半导体 - NSC 显示驱动器驱动程序和接口接口集成电路测试闪光灯
页数 文件大小 规格书
21页 825K
描述
Tiny LED Driver for Camera Flash and 4 LEDs with I2C Programmability, Connectivity Test and Audio Synchronization

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LP55271TLX 技术参数

是否Rohs认证： 符合生命周期：Obsolete
零件包装代码：BGA包装说明：VFBGA,
针数：30Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.71数据输入模式：SERIAL
接口集成电路类型：LED DISPLAY DRIVERJESD-30 代码：R-PBGA-B30
JESD-609代码：e1长度：2.97 mm
湿度敏感等级：1复用显示功能：NO
功能数量：1区段数：5
端子数量：30最高工作温度：85 °C
最低工作温度：-30 °C封装主体材料：PLASTIC/EPOXY
封装代码：VFBGA封装形状：RECTANGULAR
封装形式：GRID ARRAY, VERY THIN PROFILE, FINE PITCH认证状态：Not Qualified
座面最大高度：0.675 mm最大供电电压：5.5 V
最小供电电压：3 V标称供电电压：3.6 V
表面贴装：YES温度等级：OTHER
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
宽度：2.54 mm最小 fmax：0.02 MHz
Base Number Matches：1

LP55271TLX 数据手册

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September 2006  
LP55271  
Tiny LED Driver for Camera Flash and 4 LEDs with I2C  
Programmability, Connectivity Test and Audio  
Synchronization  
General Description  
Features  
n High current boost DC-DC converter (up to 1A output  
current)  
The LP55271 is a lighting management unit for handheld  
devices with I2C compatible control interface. The LP55271  
has a step-up DC/DC converter with high current output and  
it drives display and keypad backlights and powers the cam-  
era flash LED. In addition the DC/DC converter has the  
output current to power for example an audio amplifier si-  
multaneously. The chip has four 8-bit programmable high  
efficiency constant current LED drivers and a FLASH LED  
driver. Built-in audio synchronization feature allows the user  
to synchronize one of the LEDs to audio input.  
n Programmable boost output voltage  
n 370 mA flash LED constant current driver with low  
tolerance and a safety circuit  
n Synchronization pin for the flash timing  
n Two single-ended audio inputs with gain control  
n Four constant current 15 mA LED drivers with 8-bit  
programmable brightness control  
n Audio synchronization feature  
The LP55271 has an integrated 370 mA flash driver with a  
safety stop feature and 46 mA torch mode. An external  
enable pin is provided for the synchronizing the flash with the  
camera action. An external software independent test inter-  
face provides a fast way to find a broken path or short on  
LED circuits. Very small microSMD package together with  
minimum number of external components is a best fit for  
handheld devices.  
n I2C compatible control interface  
n Built-in LED connectivity test to maximize manufacturing  
yield  
n Small microSMD-30 package (2.5 mm x 3.0 mm x 0.6  
mm)  
Applications  
n Camera FLASH, funlight and backlight driving in battery  
powered devices  
Typical Application  
20202401  
© 2006 National Semiconductor Corporation  
DS202024  
www.national.com  
1234567...21

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