• [ CXLE8179 ]"

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1.产品概述       2.产品特点     hgO嘉泰姆

3.应用范围       4.技术规格书下载（PDF文档）hgO嘉泰姆

5.产品封装       6.电路原理图  hgO嘉泰姆

7.相关产品hgO嘉泰姆

   产品概述 返回TOPhgO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TOPhgO嘉泰姆

• Input Voltage Range: 2.7V to 5.5VhgO嘉泰姆
• Drives up to 4 LEDs at 30mA EachhgO嘉泰姆
• LED Brightness Control Through SinglehgO嘉泰姆
    Wire InterfacehgO嘉泰姆
• 16-Step Brightness ControlhgO嘉泰姆
• High Efficiency by Fractional Conversion withhgO嘉泰姆
    1× and 1.5× ModeshgO嘉泰姆
• Switching Frequency: 1MHzhgO嘉泰姆
• Regulated Output Current with 1% MatchinghgO嘉泰姆
• Internal Soft-Start Limits Inrush CurrenthgO嘉泰姆
• Low Input Ripple and Low EMIhgO嘉泰姆
• Over-Current and Over-Temperature ProtectionhgO嘉泰姆
• Under-Voltage Lockout with HysteresishgO嘉泰姆
• Operating Temperature Range: -40℃ to +85℃hgO嘉泰姆
• Available in Green TQFN-3×3-16L PackagehgO嘉泰姆

   应用范围 返回TOPhgO嘉泰姆

Mobile Phone, DSC, MP3hgO嘉泰姆
White LED BacklightinghgO嘉泰姆
LCD Display SupplyhgO嘉泰姆

   技术规格书（产品PDF) 返回TOP hgO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！hgO嘉泰姆

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产品封装图 返回TOPhgO嘉泰姆

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电路原理图 返回TOPhgO嘉泰姆

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◀ Previous:advantages over ballast resistors include much lower bias variation with supply voltage variation CXLE8178 uses an internal resistor to set the bias current for four LEDs, which are matched to ?%

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Next▶:-channel ultra low CXLE8180 incorporates a single wire interface to program the output current at 16 continuous steps. It has an internal deglitch circuit for filtering the noise of the EN input