CN5611是一款可以工作于2.7V到6V的電流調(diào)制電路, 恒定輸出電流可達(dá)1.2安培,可以用來(lái)驅(qū)動(dòng)包括白色發(fā)光二極管在內(nèi)的發(fā)光二極管.CN5611的輸出電流通過(guò)一個(gè)外部的電阻設(shè)置,可設(shè)置的電流范圍為30毫安到1.2安培.芯片內(nèi)部集成有功率晶體管,大大減少了外部元器件的數(shù)目.其它功能包括芯片過(guò)溫保護(hù),LED短路/斷路保護(hù)等.
CN5611采用散熱能力較強(qiáng)的5管腳SOT89封裝.
特點(diǎn):
     工作電壓范圍::2.7V 到 6V
l   芯片內(nèi)部集成有功率晶體管
l   低壓差
l   用外部電阻設(shè)置的輸出電流可達(dá)500mA
l   輸出電流精度:±8%
l   芯片過(guò)溫保護(hù)
l   LED短路/斷路保護(hù)
l   采用5管腳的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