Circuit Drives Mixed Types and Quantities of LEDs

Abstract:ThisapplicationnotepresentsatechniquethatallowsyoutomixLEDquantitiesandtypes,andrequiresjustonepower-supplyvoltage.Maxim>Designsupport>Appnotes>AmplifierandComparatorCircuits>APP1862Maxim>Designsupport>Appnotes>DisplayDrivers>APP1862Maxim>Designsupport>Appnotes>Power-SupplyCircuits>APP1862Keywords:WLED,WhiteLED,activeballast,currentmirror,LED,boost,LEDdriver,transistorJan24,2003APPLICATIONNOTE1862CircuitDrivesMixedTypesandQuantitiesofLEDsAbstract:ThisapplicationnotepresentsatechniquethatallowsyoutomixLEDquantitiesandtypes,andrequiresjustonepower-supplyvoltage.AsimilarversionofthisarticleappearedintheOctober3,2002issueofEDNmagazine.PortablesystemsoftenuseLEDsofdiffere