CXLE8179

CXLE8179是一款高性能的白色LED驱动程序。它集成了电流源和自动模式选择电荷泵。该部分采用1×/1.5×分数电荷泵和低漏电流源,保持了高效率。小等效1×模开环电阻和极低的电流源压降,延长了1×模工作时间,优化了锂离子电池在白光LED应用中的效率。
CXLE8179最多支持4个白色LED并调节恒定电流,初始值可由外部电阻器设置。该部分实现了4位DAC,用于亮度控制。用户可以通过串行脉冲轻松配置0.5mA到30mA的LED电流。白色led电流的调光可以通过在EN引脚上施加脉冲信号来实现。用户可设置16级电流。工作电压范围为2.7V~5.5V,内部软启动电路有效地降低了启动和模式转换时的涌入电流。关闭时,负载与车辆识别号断开,关闭电流小于1μA。

120mA四通道电流源自动模式电荷泵高性能白光LED驱动器低漏失电流源CXLE8179每30毫安可驱动多达4个LED通过单个LED亮度控制导线接口16步亮度控制高性能的白色LED驱动程序

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1.产品概述       2.产品特点     0jz嘉泰姆

3.应用范围       4.技术规格书下载(PDF文档)0jz嘉泰姆

5.产品封装       6.电路原理图  0jz嘉泰姆

7.相关产品0jz嘉泰姆

   产品概述 返回TOP0jz嘉泰姆


The CXLE8179 is a high performance white LED driver. It integrates current sources and automatic mode selection charge pump. The part maintains the high efficiency by utilizing a 1× / 1.5× fractional charge pump and low dropout current sources. The small equivalent 1× mode open loop resistance and ultra-low dropout voltage of current source extend the operating time of 1× mode and optimize the efficiency of Li-ion battery in white LED applications.The CXLE8179 supports up to 4 white LEDs and regulates a constant current which the initial value can be set by an external resistor. The part implements a 4-bit DAC for brightness control. Users can easily configure the LED current from 0.5mA to 30mA by a serial pulse. The dimming of white LEDs current can be achieved by applying a pulse signal to the EN pin. There are totally 16 steps of current could be set by users. The operating voltage range is 2.7V to 5.5V. Internal soft start circuitry effectively reduces the in-rush current while both start-up and mode transition. The load is disconnected from VIN while shutdown and the shutdown current is less than 1μA.CXLE8179 is available in Green TQFN-3×3-16L package. It operates over an ambient temperature range of -40℃ to +85℃

   产品特点 返回TOP0jz嘉泰姆


• Input Voltage Range: 2.7V to 5.5V0jz嘉泰姆
• Drives up to 4 LEDs at 30mA Each0jz嘉泰姆
• LED Brightness Control Through Single0jz嘉泰姆
    Wire Interface0jz嘉泰姆
• 16-Step Brightness Control0jz嘉泰姆
• High Efficiency by Fractional Conversion with0jz嘉泰姆
    1× and 1.5× Modes0jz嘉泰姆
• Switching Frequency: 1MHz0jz嘉泰姆
• Regulated Output Current with 1% Matching0jz嘉泰姆
• Internal Soft-Start Limits Inrush Current0jz嘉泰姆
• Low Input Ripple and Low EMI0jz嘉泰姆
• Over-Current and Over-Temperature Protection0jz嘉泰姆
• Under-Voltage Lockout with Hysteresis0jz嘉泰姆
• Operating Temperature Range: -40℃ to +85℃0jz嘉泰姆
• Available in Green TQFN-3×3-16L Package0jz嘉泰姆

   应用范围 返回TOP0jz嘉泰姆


Mobile Phone, DSC, MP30jz嘉泰姆
White LED Backlighting0jz嘉泰姆
LCD Display Supply0jz嘉泰姆

   技术规格书(产品PDF) 返回TOP 0jz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0jz嘉泰姆

 QQ截图20160419174301.jpg0jz嘉泰姆

产品封装图 返回TOP0jz嘉泰姆


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电路原理图 返回TOP0jz嘉泰姆


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◀ 上一篇: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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下一篇▶:CXLE8180单线接口以16个连续步骤编程输出电流4通道超低功耗恒流源并行LED驱动器20毫安负载35毫伏的电压降