Cxle8139 is a DC / DC converter specially designed for constant current white LED driver. The internal MOSFET can support 10 white LED backlight and OLED power applications at the same time, and the internal soft start function can reduce the surge current. Cxle8139 adopts current mode, fixed 1.0mhz frequency, and adjusts LED current through external current detection resistance. Low feedback voltage of 300mV reduces power consumption. Other features include current limiting protection, over temperature protection, under voltage protection and over-voltage protection
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[ CXLE8139 ]"
目录
产品概述 返回TOP
CXLE8139是一款专门为恒流白光LED驱动而设计的DC/DC转换器。内部MOSFET能够同时支持10个白光 LED背光和OLED电源的应用，且内部软启动功能可以减少浪涌电流。CXLE8139采用电流模式，固定 1.0MHz频率，通过外部电流检测电阻来调节LED电流。300mV的低反馈电压减小电源功耗。其他特性还 包括限流保护，过温保护，欠压保护和过压保护功能。CXLE8139采用纤小的SOT-23-6L和DFN-8L 2X2封装。
产品特点 返回TOP
?电源工作范围：2.5V~5.5V
?内部N-MOSFET开关管
? 宽范围PWM调光(100Hz~200kHz)
? 1.0MHz开关频率 ? 300mV反馈电压
? 2A开关限流
? 较少的外部元件
?内部补偿
?过压保护
应用范围 返回TOP
?移动电话和数码相机
? 平板电脑、智能电话、MP3、OLED
? 便携式设备
? LCD电源
? 高亮LED闪光灯
技术规格书（产品PDF) 返回TOP
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产品封装图 返回TOP
电路原理图 返回TOP
相关芯片选择指南 返回TOP
| LV Product>LED Backlight | ||||||||
| Product | Character | Typical Effciency | Operating Voltage | Quiescent Iq | Output Voltage | Iq in Shutdown | SW Current Limit | Package |
| CXLE8135 | 1MHz Asynchronous PWM | 88% | 2.5~5.5V | 400μA | UP to 20V | 1μA | 1A | SOT23-5L |
| CXLE8136 | 1MHz OVP Asynchronous PWM | 88% | 2.5~6V | 550μA | Up to 25V | 1μA | 1A | SOT23-6L |
| CXLE8137 | 1MHz OVP Asynchronous PWM | 92% | 2.5～5.5V | 400μA | Up to 36V | 1μA | 1.2A | SOT23-6L |
| CXLE8138 | 1MHz OVP Asynchronous PWM | 92% | 2.5～5.5V | 400μA | Up to 36V | 1μA | 1.2A | SOT23-6L DFN22-8L |
| CXLE8139 | 1MHz OVP Asynchronous PWM | 92% | 2.5~5.5V | 400μA | Up to 36V | <1μA | 2A | TSOT23-6L DFN22-8L |
