内置PWM调光单列10颗WLED升压驱动器10 White LED Boost Converter with PWM Dimming CXLE8171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CXLE8171能驱动单串10LEDs串连负载，从而保证所有LED电流相同。CXLE8171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

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     CXLE8171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CXLE8171能驱动单串10LEDs串连负载，从而保证所有LED电流相同。CXLE8171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。CXLE8171回馈电压为200mV，通过回馈电阻可以设置LED最大输出电流。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~200KHz，并在调光时不会在输出电容上产生音频噪声。其内置38.5过压保护功能为LED提供开路保护。CXLE8171采用TSOT23-6封装。The CXLE8171 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, as shown in the typical application. During the operation, the LED current can be controlled through the EN pin with a 8KHz or higher frequency PWM dimming signal on EN pin, CXLE8171 operates in PWM dimming mode, which the duty cycle determines the feedback reference voltage. The CXLE8171 does not generate audible noises on the output capacitor. For the protection, the ECXLE8171provides 41.5V OVP to prevent damage from LED open. The ECXLE8171is available in low profile TSOT23-6 package.

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‧2.6V～5.5V输入电压Hp4嘉泰姆

‧38.5V过压保护Hp4嘉泰姆

‧内置软启动</p>

‧补偿内置Hp4嘉泰姆

‧PWM调光频率范围：8KHz~200KHzHp4嘉泰姆

‧内置45V功率管</p>

‧工作频率高达1MHzHp4嘉泰姆

‧过压保护Hp4嘉泰姆

‧过温保护Hp4嘉泰姆

‧输入欠压锁定Hp4嘉泰姆

‧TSOT23-6封装Hp4嘉泰姆

‧符合RoHS规范及Pb-FreeHp4嘉泰姆

2.6V to 5.5V Input RangeHp4嘉泰姆

41.5V Output Over Voltage ProtectionHp4嘉泰姆

Internal Soft-StartHp4嘉泰姆

Internal CompensationHp4嘉泰姆

External PWM Dimming with 8KHz - 100KHzHp4嘉泰姆

Frequency RangeHp4嘉泰姆

Internal 45V N-FETHp4嘉泰姆

1MHz Fixed Switching FrequencyHp4嘉泰姆

Over Voltage ProtectionHp4嘉泰姆

Over Thermal ProtectionHp4嘉泰姆

VIN Under Voltage LockOutHp4嘉泰姆

Available in TSOT23-6 PackageHp4嘉泰姆

RoHS Compliant and 100% Lead (Pb)-FreeHp4嘉泰姆

Halogen-FreeHp4嘉泰姆

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