Cxle8136 series is a boost DC / DC converter with fixed oscillation frequency and constant current output, which is very suitable for backlight driving circuits of mobile phones, PDAs, digital cameras and other electronic products. The output voltage can reach 23v, the input voltage of 3.2V can drive six LEDs in series, and the input voltage of 2.5V can drive two parallel LEDs (three LEDs in series). The brightness of the LED can be controlled by changing the duty cycle of the PWM signal on the CE pin. A field effect transistor with on resistance of only 0.8 Ω is integrated inside, and micro inductor and capacitor can be used outside to reduce the occupied area of PCB
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[ CXLE8136 ]"
目录
产品概述 返回TOP
CXLE8136系列是固定振荡频率、恒流输出的升压型DC/DC转换器，非常适合于移动电话、PDA、数码相 机等电子产品的背光驱动电路。输出电压可达23V，3.2V输入电压可以驱动串联的六个LED，2.5V输入电 压可以驱动两路并联LED(每路串联三个LED)。通过改变CE脚上PWM信号的占空比可以控制LED的亮度。 内部集成有导通电阻只有0.8Ω的场效应管，外部可使用微型电感和电容，以缩小占用印制板的面积。
产品特点 返回TOP
?输入电压范围：2.5V至6.0V
? 输出电压范围：可达23V
? 启动参考基准电压：0.25V ?振荡频率：1.0MHz
? 输出导通电阻：0.8Ω ?转换效率：88%(驱动三个串联LED@Vin=3.6V ILED=20mA)
? 通过PWM信号控制LED亮度
?待机电流：ISTB=1.0uA(MAX)
? 负载电容：0.22uF(瓷介)
? Lx最大电流：1.0A
?白光LED驱动
应用范围 返回TOP
?移动电话机
? 平板电脑
? 数码相机
?MP3，PMP，PDA
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 |
