CN5611是一款可以工作于2.7V到6V的电流调制电路, 恒定输出电流可达1.2安培,可以用来驱动包括白色发光二极管在内的发光二极管.CN5611的输出电流通过一个外部的电阻设置,可设置的电流范围为30毫安到1.2安培.芯片内部集成有功率晶体管,大大减少了外部元器件的数目.其它功能包括芯片过温保护,LED短路/断路保护等.
CN5611采用散热能力较强的5管脚SOT89封装.
特点:
     工作电压范围::2.7V 到 6V
l   芯片内部集成有功率晶体管
l   低压差
l   用外部电阻设置的输出电流可达500mA
l   输出电流精度:±8%
l   芯片过温保护
l   LED短路/断路保护
l   采用5管脚的SOT89

Low-Dropout, High-Brightness LED Driver
CN5611
General Description:
The CN5611 current regulator operates from a 2.7V to 6V input voltage range and delivers a constant current that is up to 1.2A to a high-brightness LED,including high-brightness white LED. The output current of CN5611 can be adjusted from 30mA to 1.2A by using an external resistor. An on-chip pass element minimizes external components while providing ±8% output current accuracy. Additional features include over temperature protection, LED short and open protection. The CN5611 is available in a thermally enhanced 5-pin SOT89 and 5 pin TO252 packages.

Applications:
z； High-Brightness LED Driver
z； LED Cap-Lamp
z； Flash Light
z； Lighting
z； Handheld Electronics
Features:
z； Operating Supply Voltage Range: 2.7V to 6V
z； On-chip Pass Element
z； Low-Dropout Voltage
z； Adjustable Output Current up to 1.2A
z； Output Current Accuracy: ±8%
z； Over Temperature Protection
z； LED Open/Short Protection
z； Operating Temperature Range:
－40℃ to 85℃
z； Available in 5-pin SOT89 and TO252
Packages
z； Pb-free Available