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首页 > 产品中心 > LED驱动电路 > LED手电筒IC > LED手电筒专用IC >CXLE8748DA CXLE8749电流调节电荷泵适合为照相机闪光灯应用中的高亮度LED供电充电泵可设置为调节闪光灯和手电筒模式的两个电流水平自动在升压和降压之间切换模式可调闪光模式电流
CXLE8748DA CXLE8749电流调节电荷泵适合为照相机闪光灯应用中的高亮度LED供电充电泵可设置为调节闪光灯和手电筒模式的两个电流水平自动在升压和降压之间切换模式可调闪光模式电流
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CXLE8748DA是一款电流调节电荷泵,非常适合为照相机闪光灯应用中的高亮度LED供电。充电泵可设置为调节闪光灯和手电筒模式的两个电流水平。
CXLE8748DA CXLE8749自动在升压和降压之间切换模式,确保LED电流不依赖于正向电压。它的开关频率为2.2兆赫,允许使用微型元件。电源电压范围从2.7伏到5.5伏,非常适合由一个锂离子电池或三到四个镍镉、镍氢或碱性电池供电的所有应用。
CXLE8748DA CXLE8749还具有非常低的关机电流、自动软启动模式以限制浪涌电流以及过电流、过电压和过热关机控制。
低电流感测参考电压(50mV)允许使用小的0603电流感测电阻器。
输出电流高达1000毫安
●火炬模式下高达95%的效率
●可调闪光模式电流
●自动降压/升压模式切换
●宽输入电压范围:2.7V至5.5V
最小外部组件:无感应器
●高频运行:2.2兆赫
●低损耗传感用低50mV参考电压
●脉宽调制调光控制
●自动软启动限制涌流
●低纹波和电磁干扰

CXLE8748DA CXLE8749电流调节电荷泵适合为照相机闪光灯应用中的高亮度LED供电充电泵可设置为调节闪光灯和手电筒模式的两个电流水平自动在升压和降压之间切换模式可调闪光模式电流
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                          目录jWX嘉泰姆

   1.产品概述      2.产品特点      3.应用范围     4.技术规格书下载(PDF文档)jWX嘉泰姆

   5.产品封装      6.电路原理图     7.相关产品jWX嘉泰姆

一.产品概述jWX嘉泰姆


   The CXLE8748DA CXLE8749 is a current-regulated charge pump ideal for powering high brightness LEDs for camera flash applications. The charge pump can be set to regulate two current levels for FLASH and TORCH modes. jWX嘉泰姆

    The CXLE8748DA CXLE8749 automatically switches modes between step-up and step-down ensuring that LED current does not depend on the forward voltage. It switches at 2.2MHz, allowing the use of tiny components. The supply voltage ranges from 2.7V to 5.5V and is ideally suited for all applications powered by a single LI-Ion battery cell or three to four NiCd, NiMH, or Alkaline battery cells. jWX嘉泰姆

   The CXLE8748DA CXLE8749 also features a very low shutdown current, an automatic soft-start mode to limit inrush current, as well as over current, over voltage and over-Thermal shutdown control. jWX嘉泰姆

   A low current sense reference voltage (50mV) allows the use of small 0603 current sensing resistors. jWX嘉泰姆

   The CXLE8748DA CXLE8749 is available in Green DFN3×3-10L package and is specified over an ambient temperature range of -40℃ to +85℃.  jWX嘉泰姆

二.产品特点jWX嘉泰姆


● Output Current up to 1000mA jWX嘉泰姆

● Up to 95% Efficiency in Torch Mode jWX嘉泰姆

● Adjustable FLASH Mode Current jWX嘉泰姆

● Automatic Buck/Boost Mode Switchover jWX嘉泰姆

● Wide Input Voltage Range: 2.7V to 5.5V jWX嘉泰姆

● Minimum External Components: No Inductors jWX嘉泰姆

● High Frequency Operation: 2.2MHz jWX嘉泰姆

● Low 50mV Reference for Low Loss Sensing jWX嘉泰姆

● PWM Dimming Control jWX嘉泰姆

● Automatic Soft Start Limits Inrush Current jWX嘉泰姆

● Low Ripple and EMIjWX嘉泰姆

三.应用范围jWX嘉泰姆


  CellphonesjWX嘉泰姆

  PADs    jWX嘉泰姆

四.技术规格书(产品PDF)jWX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!jWX嘉泰姆

 QQ截图20160419174301.jpgjWX嘉泰姆

五.产品封装图jWX嘉泰姆


blob.pngblob.png  jWX嘉泰姆

六.电路原理图jWX嘉泰姆


blob.png   jWX嘉泰姆

七.相关芯片选择指南    更多同类产品......jWX嘉泰姆


High Power White LED

ProductjWX嘉泰姆

Character Typ.  Ope. Voltage

Quie.jWX嘉泰姆

Iq  Output  LED Current Package
CXLE87100 1.0MHz OVP 3W LED Asynchronous PWM 90% 0.9~6.5V 1mA 1μA <0.8A Fix(Vfb=95mV) SOT23-6L
CXLE87100B 1.0MHz OVP 3W LED Asynchronous PWM 90% 0.9~6.5V 1mA 1μA <0.8A Auto adjust(Type   Vfb=95mV) SOT23-6L
CXLE87101 2.0MHz 1.5A Flash LED Driver 95% 2.7~5.5V 300μA 1μA 1.5A Independent RSETM/RSETF Current set pins TDFN32-14L
电源管理 > LED驱动 > 闪光灯驱动
Product Topology VIN VOVP IQ IOUT R(ON) Freq. Package Size
Min. Max. Typ. Typ. MAX. Typ. Typ. (L×W)
(V) (V) (uA) (A) (Ω) (MHz) (mm)
CXLE8747 Current Sink 2.7 5.5 - 220 0.2 - - SOT363 2.1 x 2.3
CXLE8748DA Charge Pump 2.7 5.5 5.5 300 1 0.5 2.2 DFN3030-10L 3.0 x 3.0
CXLE8749 Charge Pump 2.7 5.5 5.5 300 1 0.5 2.2 DFN3030-10L 3.0 x 3.0
CXLE8750 Charge Pump 2.7 5.5 5.5 300 0.8 0.8 2.4 DFN3030-10L 3.0 x 3.0
CXLE8751 Charge Pump 2.7 5.5 5.5 300 1 0.6 2.4 DFN3030-10L 3.0 x 3.0