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时间: 2019-12-24 18:05
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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……