宽输入升/降压白光LED驱动器White LED Driver For Buck-Boost Application CXLE8168是一款具有宽输入电压范围、专为驱动白光LED设计的恒流升压转换器。凭借其特殊的拓扑结构，芯片提供的负载电压既可以高于输入电压，又可以低于输入电压。芯片可以同时对多路串、并联的LED提供精准的电流调制

   产品概述 返回TOPijj嘉泰姆

      CXLE8168是一款具有宽输入电压范围、专为驱动白光LED设计的恒流升压转换器。凭借其特殊的拓扑结构，芯片提供的负载电压既可以高于输入电压，又可以低于输入电压。芯片可以同时对多路串、并联的LED提供精准的电流调制。CXLE8168具有Analog/PWM两种模式的亮度调节功能，只需要在CTRL引脚加入Analog/PWM信号即可对LED亮度进行控制。芯片的工作频率高达1MHz，结合以脉宽调制（PWM）的工作模式，在保证最小输入纹波的情况下允许用户使用较小的输入/输出电容和电感。可编程的软启动能够消除芯片启动时的浪涌电流。CXLE8168采用8-pin 3mmx3mm TDFN封装。The CXLE8168 is a constant current boost converter specially designed for driving white LEDs with wide input range. The unique converter topology provide a load voltage which can be greater or less than the input voltage. With the tightly regulated load current, the CXLE8168 allows series connection with multiple strings of the white LEDs. The brightness of the LEDs can be adjusted through a voltage level on the CTRL pin or by applying a PWM signal to CTRL pin. 1MHz current-mode, pulse-width modulated (PWM) operation allows for small input and output capacitors and a small inductor while minimizing ripple on the input supply/battery. Programmable soft-start eliminates inrush current during startup. The CXLE8168is available in a space-saving, 8-pin 3mm x 3mm TDFN package.

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• 6～25V输入电源电压ijj嘉泰姆

• 32V过压保护ijj嘉泰姆

• 效率高达90%ijj嘉泰姆

• PWM和Analog两种调光方式ijj嘉泰姆

• 高压功率管内置</p>

• 1MHz开关频率</p>

• 小尺寸外围电感、电容</p>

• 3mm × 3mm TDFN8封装ijj嘉泰姆

• 符合RoHS规范及Pb-Freeijj嘉泰姆

􀁺 6V to 25V Input Rangeijj嘉泰姆

􀁺 32V (typ.) Output with Overvoltage Protectionijj嘉泰姆

􀁺 Up to 90% Efficiencyijj嘉泰姆

􀁺 Flexible Analog or PWM Dimming Controlijj嘉泰姆

􀁺 Internal High Power MOSFET Switchijj嘉泰姆

􀁺 1MHz PWM Operationijj嘉泰姆

􀁺 Small, Low-Profile Inductors and Capacitorsijj嘉泰姆

􀁺 3mm× 3mm TDFN-8 Packageijj嘉泰姆

􀁺 RoHS Compliant and 100% Lead (Pb)-Freeijj嘉泰姆

   应用范围 返回TOPijj嘉泰姆

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• 7~10吋白光LED背光显示驱动ijj嘉泰姆

• 12V汽车显示系统ijj嘉泰姆

• PDVD和微型笔记</p>

• LED照明设备ijj嘉泰姆

􀁺 7~10 inch White LED Display Backlightingijj嘉泰姆

􀁺 12V Automotive Display Systemijj嘉泰姆

􀁺 PDVD and Subnotebooksijj嘉泰姆

􀁺 LED Lightingijj嘉泰姆

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