电平转换器有助于并行LED电流驱动器

摘要：使用一对匹配晶体管的高边电流检测信号转换到地面参考，该电路允许你并行的要求，以实现所需的驱动电流LED驱动电路。

Maxim>AppNotes>DisplayDriversLEDLightingKeywords:whiteLEDs,LEDdrivers,matchedtransistorpair,high-sidecurrentsensingDec08,2010APPLICATIONNOTE4537LevelShifterHelpstoParallelLEDCurrentDriversAbstract:Usingapairofmatchedtransistorstotranslateahigh-sidecurrent-sensesignaldowntoagroundreference,thiscircuitletsyouparallelLED-drivercircuitsasrequiredtoachievethedesireddrivecurrent.AsimilarversionofthisarticleappearedintheFebruary19,2008issueofMachineDesignmagazine.AswhiteLEDsbecomemorepervasive,theindustryprovidesmoreoptionsfordrivingthem.Linearconstant-currentdrivers,forinstance,offerlowEMI,lowcost,andrequireonlyafewcompo