在开关模式LED背光中单FET控制的第二个LED阵列

摘要：PDA，手机，数码相机，以及其他便携式设备中常见的WLED背光。本应用笔记介绍了一种开关模式升压设计，其中显示器背光长时间。其转换效率，在有限的电阻和线性调节的设计提供了一个省电的优点。

Maxim>Designsupport>Appnotes>DisplayDrivers>APP1871Keywords:LED,backlight,keypad,display,switchmodeFeb03,2003APPLICATIONNOTE1871SingleFETControls2ndLEDArrayinSwitch-ModeLEDBacklightBy:LenShermanAbstract:WLEDbacklightsarecommoninPDAs,cellphones,digitalcameras,andotherportabledevices.Thisapplicationnotedescribesaswitch-modeboostdesigninwhichthedisplayisbacklitforextendedperiodsoftime.Itsconversionefficiencyprovidesapower-savingadvantageoverresistor-limitedandlinearlyregulateddesigns.AsimilarversionofthisarticleappearedintheApril12,2001issueofEDNmagazine.White-LEDb