软启动增强了 LED 驱动程序

摘要：模仿自然的软启动的白炽灯，此电路使用内置LED驱动IC(MAX16832)的热折弯保护。从而避免了否则指示灯由展示的恼人和几乎瞬时启动。

Maxim>AppNotes>DisplayDriversLEDLightingKeywords:LEDdrivers,softstart,NTCresistors,constant-currentsources,current-foldbackprotectionAug17,2010APPLICATIONNOTE4481Soft-StartEnhancesLEDDriverBy:FonsJanssen,SeniorMemberoftheTechnicalStaffAbstract:Toemulatethenaturalsoftstartofanincandescentbulb,thiscircuitmakesuseofthethermal-foldbackprotectionbuiltintoanLED-driverIC(MAX16832).IttherebyavoidstheannoyingandalmostinstantaneousstartupotherwiseexhibitedbyLEDs.AsimilarversionofthisarticleappearedintheMarch11,2009issueofPowerManagementDesignline(EETimes).OneofthelessobviousdifferencesbetweenincandescentlightbulbsandLED-basedlightsisthespeedatwhichtheystartup.Ani