高功率LED驱动器接受宽输入电压范围

摘要：尽管允许输入电压的变化，从2.7V到16.5V，降压/升压转换器控制器为基础的电路调节白光LED电流。

Maxim>AppNotes>DisplayDriversPower-SupplyCircuitsKeywords:LEDdrivers,whiteLEDs,switchingconverters,buck/boostconverters,MOSFETpowerswitchesJun15,2005APPLICATIONNOTE3532High-PowerLEDDriverAcceptsWideInput-VoltageRangeAbstract:Circuitbasedonabuck/boostconvertercontrollerregulatescurrenttoawhiteLED,despiteanallowedvariationofinputvoltagefrom2.7Vto16.5V.AsimilarversionofthisarticleappearedasaDesignBriefintheJanuary20,2005issueofElectronicDesignmagazine.Theadventofhigh-powerLEDscapableofreplacingincandescentbulbshasproducedaneedforcircuitsthatefficientlymatchtheLEDstoavailablepowersources(batteries,carelectricalsystems,etc.).Thecircuitsshouldalsobeabletor