The cxle87100 uses two alkaline batteries to drive up to 1a load current. LED current can be programmed by external current detection resistor, RS is connected between feedback pin (FB) and ground. 95 MV low feedback voltage reduces the loss of RS for better efficiency. The built-in 2a, 100m Ω NMOS switch enables the chip to provide high efficiency under heavy load

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[ CXLE87100 ]"
目录
产品概述 返回TOP
CXLE87100是一款提供可调节输出电流的升压型DC-DC稳压器,芯片工作于1.0MHz恒定的开关频率,允许 使用小型的外部电感和陶瓷电容。CXLE87100使用两节碱性电池可以驱动高达1A负载电流。LED电流可以通 过外部电流检测电阻来编程,Rs连接在反馈引脚(FB)和地之间。95mV低反馈电压降低了Rs的损耗以获 得更好效率。内置2A,100mΩ NMOS开关管,使芯片在重负载下也能提供高效率。在关断模式,反馈电 阻Rs和负载完全断开,消耗电流减小到1uA以下。CXLE87100采用SOT-23-6L封装。
产品特点 返回TOP
LED电源效率:高达90%
电流精度:5%(Vin=3.6V~1.8V@Vf=3.7V)
低启动电压:0.9V(ILED=270mA)
低保持电压:0.75V(ILED=200mA)
1MHz开关频率
使用微型外部原件
低RDS(ON):100mA(典型值)
过温保护
小型SOT-23-6L封装
应用范围 返回TOP
白光LED手电
白光LED相机闪光灯
手机摄像头闪光灯
PDA相机闪光灯
摄像机闪光灯
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
High Power White LED |
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Product |
Character |
Typical Efficiency |
Operating Voltage |
Quiescent Iq |
Iq in Shutdown |
Output Current |
LED Current Control |
Package |
1.0MHz OVP 3W LED Asynchronous PWM |
90% |
0.9~6.5V |
1mA |
1μA |
<0.8A |
Fix(Vfb=95mV) |
SOT23-6L |
|
1.0MHz OVP 3W LED Asynchronous PWM |
90% |
0.9~6.5V |
1mA |
1μA |
<0.8A |
Auto adjust(Type Vfb=95mV) |
SOT23-6L |
|
2.0MHz 1.5A Flash LED Driver |
95% |
2.7~5.5V |
300μA |
1μA |
1.5A |
Independent RSETM/RSETF Current set pins |
TDFN32-14L |