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首页 > 产品中心 > LED驱动电路 > LED背光 > 白灯背光驱动IC >CXLE8178内部电阻器为四个LED设置偏置电流30毫安时低50毫伏电压降2.5V至5.5V电源电压LED显示背光驱动器 照相机闪光灯的LED
CXLE8178内部电阻器为四个LED设置偏置电流30毫安时低50毫伏电压降2.5V至5.5V电源电压LED显示背光驱动器 照相机闪光灯的LED
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CXLE8178用于白光LED的CXLE8178低压差偏置电源是传统白光LED设计中使用的简单镇流器电阻器的高性能替代品。它是为低功耗键盘和便携式背光应用而优化的。
CXLE8178使用一个内部电阻器为四个LED设置偏置电流,其匹配度为±5%。与镇流器电阻器相比,CXLE8178的优点包括:随电源电压变化的偏置变化小得多,显著降低了漏失电压,在某些应用中,显著提高了效率。
CXLE8178只需要在30毫安负载下为每个输出提供50毫伏的电压降,以匹配LED亮度。

CXLE8178内部电阻器为四个LED设置偏置电流30毫安时低50毫伏电压降2.5V至5.5V电源电压LED显示背光驱动器 照相机闪光灯的LED
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1.产品概述       2.产品特点     SNy嘉泰姆

3.应用范围       4.技术规格书下载(PDF文档)SNy嘉泰姆

5.产品封装       6.电路原理图  SNy嘉泰姆

7.相关产品SNy嘉泰姆

   产品概述 返回TOPSNy嘉泰姆


The CXLE8178 low-dropout bias supply for white LEDs is a high-performance alternative to the simple ballast resistors used in conventional white LED designs. It is optimized for low power keypad and portable backlighting applications.The CXLE8178 uses an internal resistor to set the bias current for four LEDs, which are matched to ±5%. The CXLE8178's advantages over ballast resistors include much lower bias variation with supply voltage variation, significantly lower dropout voltage, and in some applications, significantly improved efficiency.The CXLE8178 requires only a 50mV dropout voltage at a 30mA load on each output to match the LED brightness.The CXLE8178 is available in Green SOT-23-6 package. It operates over an ambient temperature range of -40℃ to +85℃.

   产品特点 返回TOPSNy嘉泰姆


• Support up to 4 LEDsSNy嘉泰姆
• Low 50mV Dropout at 30mASNy嘉泰姆
• Less than ±5% LED Current MatchingSNy嘉泰姆
• Simple LED Brightness ControlSNy嘉泰姆
• Low Shutdown CurrentSNy嘉泰姆
• 2.5V to 5.5V Supply Voltage RangeSNy嘉泰姆
• Thermal Shutdown ProtectionSNy嘉泰姆
• Operating Temperature Range: -40℃ to +85℃SNy嘉泰姆
• Available in Green SOT-23-6 PackageSNy嘉泰姆

   应用范围 返回TOPSNy嘉泰姆


Wireless HandsetsSNy嘉泰姆
MP3, MP4, and PMPSNy嘉泰姆
Cellular PhonesSNy嘉泰姆
Portable Communication DevicesSNy嘉泰姆
Digital Cameras, CamcordersSNy嘉泰姆
PDAs, Palmtops, and Handy TerminalsSNy嘉泰姆
LED/Display Back Light DriverSNy嘉泰姆
LEDs for Camera FlashSNy嘉泰姆
Battery-Powered EquipmentSNy嘉泰姆

   技术规格书(产品PDF) 返回TOP SNy嘉泰姆


     需要详细的PDF规格书请扫一扫微信联系我们,还可以获得免费样品以及技术支持SNy嘉泰姆

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产品封装图 返回TOPSNy嘉泰姆


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电路原理图 返回TOPSNy嘉泰姆


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