Synchronous LED Driver CXLE82127 is a driver specially designed for back-lighting. It consists of a high accuracy current sink that allows low duty dimming and a high efficiency step-up converter with

   产品概述 返回TOPzfn嘉泰姆

The CXLE82127 is a driver specially designed for back-lighting. It consists of a high accuracy current sink that allows low duty dimming and a high efficiency step-up converter with an integrated low side and high side power MOSEFT. It runs withan optimal 0.6MHz frequency that enables use of small external components while still providing best efficiencies. It has an internal current limit as high as 1A, and it can drive up to 8 LEDs and 50mA in total output current. True PWMDimming can be achieved through the EN pin. One of the most important features of CXLE82127 is that it provides an accurate current at dimming duty cycle down to 0.1%. This is very important for backlights that need to dim to very low light while still providing good consistency. For maximum protection, the CXLE82127 has an internal OVP protection at 30V to prevent the chip from damages when the LED string is not connected to the output. CXLE82127 is available in a space-saving SOT23-6 package.

 CXLE82127是一款专为背光设计的高性能驱动芯片。与传统背光驱动相比，内置了同步开关的控制方式，支持输出真关断，以防止屏意外短路时的保护，以及显著降低EN拉低时的静态漏电流。它以最佳的0.6MHz频率运行，外围器件少，同时仍然提供最佳效率。它的内部电流限制为1.2A，并且它可以在总输出电流中驱动多达8串LED，50mA的输出能力。</p>

  CXLE82127支持超低占空比输出，低至0.1%。为了最大保护，CXLE82127在30V时会启动一个内部OVP保护，以防止当LED未连接到输出时芯片损坏。</p>

  CXLE82127采用SOT23-6封装。</p>

   产品特点 返回TOPzfn嘉泰姆

 Synchronous Boost, No Schottky Diode Needed zfn嘉泰姆

 Internal Current Source Driving, no need of external current setting resistor zfn嘉泰姆

 ±10% LED Current Accuracy at 1% Diming Ratio zfn嘉泰姆

 Capable of 0.1% dimming ratio zfn嘉泰姆

 Up to 85% Efficiency (6 LEDs) zfn嘉泰姆

 Drive up to 8 LEDs zfn嘉泰姆

 30V Output Over Voltage Protection zfn嘉泰姆

 LED string Short Circuit Protection zfn嘉泰姆

 True PWM Brightness Control zfn嘉泰姆

 1A current limitzfn嘉泰姆

   应用范围 返回TOPzfn嘉泰姆

 Cellphone and Smartphone zfn嘉泰姆

 MID or Tablet PC zfn嘉泰姆

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