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1、DiodesAL1672高性能LED驅動器解決方案Diodes公司的AL1672是高性能單級降壓轉換器,工作在BCM模式，具有良好的EMI和效率,支持多種調光模式?器件集成了600V/4A高壓MOSFET和多種保護模式如過壓，短路，過流和超溫等，主要用在具有調光功能的通用LED照明驅動器，通用恒流源和智能LED照明.本文介紹了AL1672主要特性，框圖，降壓應用電路圖以及100~265VAC高PF降壓LED驅動器演示板主要特性和指標，電路圖和變斥器電路圖，材料清單和PCB設計圖.TheAL1672isahighperformanees
2、inglestageBuckconvertor,targetingdimmableLEDlightingapplication.ItisoperatingatBCMmodewhichresultsingoodEMIandefficiency.TheAL1672cansupicewilloperateinanalogdimmingmode.WhenadigitalsignalisappliedonAPWMpin,thedeviceworksatPWMdimmingmode?TheAL1672featureslowstart-upcurr
3、entandlowoperationcurrent.Itintegratesmultipleprotectionsincludingovervoltage,shortcircuit,overcurrentandovertemperatureprotection.Italsointegrates600V/4AhighvoltageMOSFET.TheAL1672isavailableinSO-8EPpackage.AL1672主要特性：-UpCurrentciency-to-DCDimmingRange:!8%to100%-BackPr
4、otection(TFP)P)-8EP-Free&FullyRoHSCompliant(Notes1&2)AL1672應用:ilircevccAPWMDRAINCOMPGND圖1.AL1672框圖圖2.AL1672降壓應用電路圖100-265VAC高PF降壓LED驅動器演示板ThisdemonstrationboardutilizestheAL1672BuckLEDdriverICprovidingacosteffectivePWM/AnalogdimmablesolutionforofflinehighbrightnessLEDap
5、plications?Thisuser-friendlyevaluationboardprovidesuserswithquickconnectiontotheirdifferenttypesofLEDstrings.ThedemonstrationboardcanbemodifiedtoadjusttheLEDoutputcurrentandthenumberofseriesconnectedLEDsthataredriven.ABOM,schematicandlayoutareincludedthatdescribesthepar
6、tsusedonthisdemonstrationboard,alongwithmeasuredperformaneecharacteristics.Thesematerialscanbeusedasarefereneedesign.LED驅動器演示板主要特性：-isolatedbuckLEDdriverLED驅動器演示板指標:LED驅動器演示板應用:DC-DCLEDDriverACLACN圖3丄ED驅動器演示板外形圖圖4.LED驅動器演示板電路圖7oWD1:Primary0.2mm*1,143Ts2Or06WD2:Axillary0
7、.12mm*1,42Tso3圖5.LED驅動器演示板變壓器電路圖LED驅動器演示板材料清單：圖6.LED驅動器演示板PCB設計圖（頂層）圖7.LED驅動器演示板PCB設計圖（底層）詳情請見：https://www.diodes.com/assets/Datasheets/AL1672.pdf和https://www.diodes.com/assets/Evaluation-Boards/AL1672EV1-User-Guide.pdfBali672EV1-User-Guide.pdf?AL1672.pdf
