目录

1.产品概述       2.产品特点     Zh8嘉泰姆

3.应用范围       4.技术规格书下载（PDF文档）Zh8嘉泰姆

5.产品封装       6.电路原理图  Zh8嘉泰姆

7.相关产品Zh8嘉泰姆

   产品概述 返回TOPZh8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TOPZh8嘉泰姆

‧2.6V～5.5V输入电压Zh8嘉泰姆

‧38.5V过压保护Zh8嘉泰姆

‧内置软启动Zh8嘉泰姆

‧补偿内置Zh8嘉泰姆

‧单线协议提供32阶LED电流调节Zh8嘉泰姆

‧PWM调光频率范围：8KHz~200KHzZh8嘉泰姆

‧工作频率高达1MHzZh8嘉泰姆

‧过压保护Zh8嘉泰姆

‧过温保护Zh8嘉泰姆

‧输入欠压锁定Zh8嘉泰姆

‧TSOT23-6封装Zh8嘉泰姆

‧符合RoHS规范及Pb-FreeZh8嘉泰姆

2.6V to 5.5V Input RangeZh8嘉泰姆

38.5V Output Over Voltage ProtectionZh8嘉泰姆

Internal Soft-StartZh8嘉泰姆

Internal CompensationZh8嘉泰姆

Single-Wire Serial Pulse Interface to Set LEDZh8嘉泰姆

Current with 32-Step ScaleZh8嘉泰姆

External PWM Dimming with 8KHz - 300KHzZh8嘉泰姆

Frequency RangeZh8嘉泰姆

Internal 45V N-FETZh8嘉泰姆

1MHz Fixed Switching FrequencyZh8嘉泰姆

Over Voltage ProtectionZh8嘉泰姆

Over Thermal ProtectionZh8嘉泰姆

VIN Under Voltage LockOutZh8嘉泰姆

Available in TSOT23-6 PackageZh8嘉泰姆

RoHS Compliant and 100% Lead (Pb)-FreeZh8嘉泰姆

Halogen-FreeZh8嘉泰姆

   应用范围 返回TOPZh8嘉泰姆

‧移动电话Zh8嘉泰姆

‧GPS 导航系统Zh8嘉泰姆

‧便携媒体播放器Zh8嘉泰姆

‧手持设备、数码相机Zh8嘉泰姆

‧便携游戏机Zh8嘉泰姆

Mobile PhonesZh8嘉泰姆

GPS Navigation SystemsZh8嘉泰姆

Portable Media PlayersZh8嘉泰姆

Handheld Devices, Digital CameraZh8嘉泰姆

Portable Game MachinesZh8嘉泰姆

   技术规格书（产品PDF) 返回TOP Zh8嘉泰姆

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产品封装图 返回TOPZh8嘉泰姆

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电路原理图 返回TOPZh8嘉泰姆

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