保护的LED背光显示器的驱动程序

摘要：几个电路的想法是为保护升压转换器的LED驱动器时的LED断开。（没有保护的情况下，驱动器输出可以摧毁外部MOSFET和肖特基二极管）LED驱动器IC（MAX1698）和比较器（MAX9060或MAX9028）。

Maxim>AppNotes>CircuitProtectionDisplayDriversKeywords:LEDdrivers,backlitdisplays,batteryoperation,circuitprotectionFeb01,2011APPLICATIONNOTE4576ProtectLEDDriverinBacklitDisplaysBy:MassimoCaprioliAbstract:Severalcircuitideasarepresentedforprotectingaboost-converterLEDdriverwhentheLEDsaredisconnected.(Withoutprotection,thedriveroutputcandestroytheexternalMOSFETandSchottkydiode.)AnLED-driverIC(MAX1698)andcomparator(MAX9060orMAX9028)areincluded.AsimilarversionofthisarticleappearedintheJuly6,2009issueofEETimesmagazine.LEDsoftenserveasthelightsourceinabacklighteddisplay,andtheyusuallyoperatewithalowbatteryvoltagesuchasthatproducedbytwoNi