目录

1.产品概述       2.产品特点     kB5嘉泰姆

3.应用范围       4.技术规格书下载（PDF文档）kB5嘉泰姆

5.产品封装       6.电路原理图  kB5嘉泰姆

7.相关产品kB5嘉泰姆

   产品概述 返回TOPkB5嘉泰姆

      CXLE8170/A是一款专为白光LED设计的升压型恒流驱动器. 通过内置45V功率管，使得CXLE8170/A能驱动单串10LEDs串连负载，从而保证所有LED电流相同。CXLE8170/A内置升压转换器工作在1MHz震荡频率和1.3A电流极限，也能用于通用型的高亮度LED照明。CXLE8170/A回馈电压为200/300mV，通过回馈电阻可以设置LED最大输出电流。CXLE8170/A内置两种调光方式：一是PWM调光，通过外加在EN端的PWM调光信号，可以得到与PWM占空比成比例的LED电流输出，其PWM调光频率范围：8KHz~300KHz，并在调光时不会在输出电容上产生音频噪声。二是单线调光，通过在EN端加入符合协议的脉冲信号，可获得32阶LED电流信号，达到调光目标。其内置38.5V过压保护功能为LED提供开路保护。CXLE8170采用TSOT23-6封装。The CXLE8170/A is a constant current step-up converter specifically designed to drive white LEDs. With a 45V rated integrated switch FET, the step-up converter supports up to 10 white LEDs in series connection, so the LED currents are identical for uniform brightness. The boost converter runs at 1.0MHz fixed switching frequency with 1.3A switch current limit, and allows for the use of a high brightness LED in general lighting. The maximum white LED current is set with the external sensor resistor RFB, and the feedback voltage is regulated to 200mV(CXLE8170A 300mV), as shown in the typical application. During the operation, the LED current can be controlled through the EN pin in two modes. With a 8KHz or higher frequency PWM dimming signal on EN pin, CXLE8170/A operates in PWM dimming mode, which the duty cycle determines the feedback reference voltage. CXLE8170/A can operate in digital dimming mode also, which a Single Wire interface on the EN pin is integrated to adjust the FB voltage in 32 steps. In either digital or PWM mode, the CXLE8170/A does not generate audible noises on the output capacitor. For the protection, the CXLE8170/A provides 38.5V OVP to prevent damage from LED open. The CXLE8170/A is available in low profile TSOT23-6 package.

   产品特点 返回TOPkB5嘉泰姆

‧2.6V～5.5V输入电压kB5嘉泰姆

‧38.5V过压保护kB5嘉泰姆

‧内置软启动kB5嘉泰姆

‧补偿内置kB5嘉泰姆

‧单线协议提供32阶LED电流调节kB5嘉泰姆

‧PWM调光频率范围：8KHz~200KHzkB5嘉泰姆

‧工作频率高达1MHzkB5嘉泰姆

‧过压保护kB5嘉泰姆

‧过温保护kB5嘉泰姆

‧输入欠压锁定kB5嘉泰姆

‧TSOT23-6封装kB5嘉泰姆

‧符合RoHS规范及Pb-FreekB5嘉泰姆

2.6V to 5.5V Input RangekB5嘉泰姆

38.5V Output Over Voltage ProtectionkB5嘉泰姆

Internal Soft-StartkB5嘉泰姆

Internal CompensationkB5嘉泰姆

Single-Wire Serial Pulse Interface to Set LEDkB5嘉泰姆

Current with 32-Step ScalekB5嘉泰姆

External PWM Dimming with 8KHz - 300KHzkB5嘉泰姆

Frequency RangekB5嘉泰姆

Internal 45V N-FETkB5嘉泰姆

1MHz Fixed Switching FrequencykB5嘉泰姆

Over Voltage ProtectionkB5嘉泰姆

Over Thermal ProtectionkB5嘉泰姆

VIN Under Voltage LockOutkB5嘉泰姆

Available in TSOT23-6 PackagekB5嘉泰姆

RoHS Compliant and 100% Lead (Pb)-FreekB5嘉泰姆

Halogen-FreekB5嘉泰姆

   应用范围 返回TOPkB5嘉泰姆

‧移动电话kB5嘉泰姆

‧GPS 导航系统kB5嘉泰姆

‧便携媒体播放器kB5嘉泰姆

‧手持设备、数码相机kB5嘉泰姆

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Mobile PhoneskB5嘉泰姆

GPS Navigation SystemskB5嘉泰姆

Portable Media PlayerskB5嘉泰姆

Handheld Devices, Digital CamerakB5嘉泰姆

Portable Game MachineskB5嘉泰姆

   技术规格书（产品PDF) 返回TOP kB5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！kB5嘉泰姆

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产品封装图 返回TOPkB5嘉泰姆

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电路原理图 返回TOPkB5嘉泰姆

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