8 LEDs per channel CXLE8256 1.1MHz, High-Efficiency, Step-Up Converter for 7~8 White LEDs,固定频率电流模式的升压转换器，内部集成了N-FET，可以驱动串联7~8颗白光LED，LED电流可以通过多种方式来做调整，1.1MHZ的工作频率减小了输入输出电容选择和纹波。OVP管脚避免了输出过压烧毁芯片的可能。内部集成

                          目录fJa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）</span>fJa嘉泰姆

   5.产品封装      6.电路原理图</strong>     7.相关产品fJa嘉泰姆

一.产品概述fJa嘉泰姆

   CXLE8256是一款固定频率电流模式的升压转换器，内部集成了N-FET，可以驱动串联7~8颗白光LED，LED电流可以通过多种方式来做调整，1.1MHZ的工作频率减小了输入输出电容选择和纹波。OVP管脚避免了输出过压烧毁芯片的可能。内部集成的软启动降低了启动过充电流。还集成了欠压保护、过热保护、过流保护功能。封装为超小型的SOT23-6封装。</span>fJa嘉泰姆

           CXLE8256驱动能力很强，最多可以驱动3串12并共36个LED。</span>fJa嘉泰姆

   The CXLE8256 is a current-mode and fixed frequency boost converter with an integrated N-FET to drive up to 7~8 white LEDs in series. The series connection allows the LED current to be identical for uniform brightness. Its low on resistance of N- FET and feedback voltage reduce power loss and achieve high efficiency. Fast 1.1MHz current-mode PWM operation is available for input and output capacitors and a small inductor while minimizing ripple on the input supply. The OVP pin monitors the output voltage and stops switching if exceeds the over-voltage threshold. An internal soft-start circuit eliminates the inrush current during start-up. It can driver 3(series)*9(parallel) LEDs or 3(series)*12(parallel) LEDs.fJa嘉泰姆

   The CXLE8256 also integrates under-voltage lockout, over-temperature protection, and current limit circuits. The CXLE8256 is available in a SOT-23-6 package.fJa嘉泰姆

二.产品特点fJa嘉泰姆

● 输入电压范围：2.5V~6VfJa嘉泰姆

● 0.25V 参考电压</span>fJa嘉泰姆

● 固定的1.1MHZ开关频率</span>fJa嘉泰姆

● 效率达到87%（8*3）或93%（3*9）</span>fJa嘉泰姆

● 100Hz到100KHz PWM占空比调光</span>fJa嘉泰姆

● 支持欠压保护fJa嘉泰姆

● 支持过温保护fJa嘉泰姆

● 1.6A输入过流保护fJa嘉泰姆

● 29V OVP电压fJa嘉泰姆

● 可以驱动3串9并或3串12并白光LEDfJa嘉泰姆

●&lt;1uA的shun down 电流fJa嘉泰姆

● SOT23-6封装fJa嘉泰姆

● 无铅封装，符合ROHS标准fJa嘉泰姆

• Wide input Voltage from 2.5V to 6VfJa嘉泰姆

• 0.25V Reference VoltagefJa嘉泰姆

• Fixed 1.1MHz Switching FrequencyfJa嘉泰姆

• High Efficiency up to 86%(8*4) or 93%(3*12)fJa嘉泰姆

• Wide Range for PWM Dimming (100Hz to 200kHz)fJa嘉泰姆

• Under-Voltage Lockout ProtectionfJa嘉泰姆

• Over-Temperature ProtectionfJa嘉泰姆

• 29V Over voltage protectionfJa嘉泰姆

• Can driver 3*9 WLEDs or 3*12 WLEDsfJa嘉泰姆

•<1μA Quiescent current During ShutdownfJa嘉泰姆

• SOT23-6 PackagefJa嘉泰姆

• Lead Free and Green Devices Available (ROHS Compliant)fJa嘉泰姆

三.应用范围fJa嘉泰姆

● 功能手机、智能手机</span>fJa嘉泰姆

● PDA、PMP、MP3fJa嘉泰姆

● 数码相机fJa嘉泰姆

● 白光LED显示屏的驱动fJa嘉泰姆

• Cell Phone and Smart PhonefJa嘉泰姆

• PDA,PMP,MP3fJa嘉泰姆

• Digital CamerafJa嘉泰姆

• White LED Display Backlighting      fJa嘉泰姆

四.技术规格书（产品PDF)fJa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</span>！</span>fJa嘉泰姆

 fJa嘉泰姆

五.产品封装图</span>fJa嘉泰姆

fJa嘉泰姆

六.电路原理图</strong>fJa嘉泰姆

   fJa嘉泰姆

七.相关芯片选择指南  更多同类产品......fJa嘉泰姆