集成PWM调光和单线调光WLED升压驱动器10 White LED Boost Converter with PWM Dimming and Single-Wire Series Interface 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

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      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.

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‧2.6V～5.5V输入电压R1G嘉泰姆

‧38.5V过压保护R1G嘉泰姆

‧内置软启动</p>

‧补偿内置R1G嘉泰姆

‧单线协议提供32阶LED电流调节R1G嘉泰姆

‧PWM调光频率范围：8KHz~200KHzR1G嘉泰姆

‧工作频率高达1MHzR1G嘉泰姆

‧过压保护R1G嘉泰姆

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‧TSOT23-6封装R1G嘉泰姆

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2.6V to 5.5V Input RangeR1G嘉泰姆

38.5V Output Over Voltage ProtectionR1G嘉泰姆

Internal Soft-StartR1G嘉泰姆

Internal CompensationR1G嘉泰姆

Single-Wire Serial Pulse Interface to Set LEDR1G嘉泰姆

Current with 32-Step ScaleR1G嘉泰姆

External PWM Dimming with 8KHz - 300KHzR1G嘉泰姆

Frequency RangeR1G嘉泰姆

Internal 45V N-FETR1G嘉泰姆

1MHz Fixed Switching FrequencyR1G嘉泰姆

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VIN Under Voltage LockOutR1G嘉泰姆

Available in TSOT23-6 PackageR1G嘉泰姆

RoHS Compliant and 100% Lead (Pb)-FreeR1G嘉泰姆

Halogen-FreeR1G嘉泰姆

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