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首页 > 产品中心 > LED驱动电路 > LED背光 > 白灯背光驱动IC >串联驱动10个LED的38V开放式LED保护升压boost转换器以1.2MHz固定开关频率开关电流限制1.1A脉宽调制亮度控制CXLE8189
串联驱动10个LED的38V开放式LED保护升压boost转换器以1.2MHz固定开关频率开关电流限制1.1A脉宽调制亮度控制CXLE8189
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CXLE8189采用40V额定集成开关FET,是一个升压转换器,可串联驱动多达10个LED。boost转换器以1.2MHz固定开关频率运行,开关电流限制为1.1A,允许在普通照明中使用高亮度LED。
默认的白色LED电流由外部传感器电阻RSET设置,反馈电压调节为200mV,如典型应用所示。在工作过程中,LED的电流可以通过控制管脚的PWM信号来控制,脉冲宽度调制(PWM)信号决定反馈的参考电压。在脉宽调制模式下,CXLE8189不会使LED电流爆裂;因此,它不会在输出电容器上产生可听的噪音。为了最大限度地保护,该器件具有集成的开放式LED保护,禁用CXL8189,以防止输出电压超过IC的绝对最大额定电压在开放的LED条件

串联驱动10个LED的38V开放式LED保护升压boost转换器以1.2MHz固定开关频率开关电流限制1.1A脉宽调制亮度控制CXLE8189
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1.产品概述       2.产品特点     Jje嘉泰姆

3.应用范围       4.技术规格书下载(PDF文档)Jje嘉泰姆

5.产品封装       6.电路原理图  Jje嘉泰姆

7.相关产品Jje嘉泰姆

   产品概述 返回TOPJje嘉泰姆


With a 40V rated integrated switch FET, the CXLE8189 is a boost converter that drives up to 10 LEDs in series. The boost converter runs at a 1.2MHz fixed switching frequency with 1.1A switch current limit, and allows for the use of a high brightness LED in general lighting.The default white LED current is set with the external sensor resistor RSET, and the feedback voltage is regulated to 200mV, as shown in the typical application. During the operation, the LED current can be controlled using PWM signal through the CTRL pin, the pulse width modulation (PWM) signal determines the feedback reference voltage. In PWM mode, the CXLE8189 does not burst the LED current; therefore, it does not generate audible noises on the output capacitor. For maximum protection, the device features integrated open LED protection that disables the CXLE8189 to prevent the output voltage from exceeding the IC’s absolute maximum voltage ratings during open LED conditions.The CXLE8189 is available in Green TDFN-2×2-6L and TSOT-23-6 packages. It operates over an ambient temperature range of -40℃ to +85℃.

   产品特点 返回TOPJje嘉泰姆


• Input Voltage Range: 3V to 20VJje嘉泰姆
• 38V Open LED Protection for 10 LEDsJje嘉泰姆
• 200mV Reference VoltageJje嘉泰姆
• 500kΩ Pull-Low Resistor on CTRL PinJje嘉泰姆
• 1.1A Switch FET with 1.2MHz Switching FrequencyJje嘉泰姆
• PWM Brightness ControlJje嘉泰姆
• 1kHz to 100kHz PWM Dimming Frequency RangeJje嘉泰姆
• Soft-Start FunctionJje嘉泰姆
• Up to 90% EfficiencyJje嘉泰姆
• -40℃ to +85℃ Operating Temperature RangeJje嘉泰姆
• Available in Green TDFN-2×2-6L and TSOT-23-6Jje嘉泰姆
   PackagesJje嘉泰姆

   应用范围 返回TOPJje嘉泰姆


High Brightness LED LightingJje嘉泰姆
White LED Backlighting for Media Form Factor DisplayJje嘉泰姆

   技术规格书(产品PDF) 返回TOP Jje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Jje嘉泰姆

 QQ截图20160419174301.jpgJje嘉泰姆

产品封装图 返回TOPJje嘉泰姆


blob.pngJje嘉泰姆

电路原理图 返回TOPJje嘉泰姆


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