NXP SSL2108x高效率通用照明LED驅(qū)動(dòng)器參考設(shè)計(jì)

NXPSSL2108x高效率通用照明LED驅(qū)動(dòng)器參考設(shè)計(jì)NXP公司的SSL2108x系列是高壓集成電路，主要用來驅(qū)動(dòng)通用照明的無調(diào)光的LED燈，效率大于95%.器件集成了300V或600V功率開關(guān)，具有多種保護(hù)功能如欠壓鎖住(UVLO),前沿消隱(LEB)，過流保護(hù)(OCP),短繞組保護(hù)(SWP),超溫保護(hù)(OTP)以及短路保護(hù)(OSP)等.本文介紹了SSL2108X主要特性和優(yōu)勢，方框圖，基本應(yīng)用框圖和降壓轉(zhuǎn)換器配置圖以及評估板主要特性，電路圖和材料清單(BOM).TheSSL2108Xisarangeofhigh-voltageIntegratedCircuits(ICs)，intendedtodrivenon-dimmableretrofitLEDlampsingenerallightingapplications.Themainbenefitsoftheproductfamilyare:,SmallPrinted-CircuitBoard(PCB)footprint，andcompactsolution,Highefficiency(upto95%),Easeofintegration?LowelectronicBillOfMaterial(BOM)TheproductfamilyismadeofICswitharangeofinternalHVswitchesforeasypowerscaling.TheICsworkasboundaryconductionmodebuckconverters.TheICrangehasbeendesignedtostartupdirectlyfromtheHVsupplybyaninternalhigh-voltagecurrentsource.FollowedbythedV/dtsupplyusingcapacitivecouplingfromthedrain，oranyotherauxiliarysupply.Thisfunctionalityprovidesfullflexibilityintheapplicationdesign.ThesupplycurrentconsumedbytheICis1mA，aninternalclamplimitsthesupplyvoltage.TheICsprovideaccurateoutputcurrentcontrolwithgreaterthan5%LEDcurrentaccuracy.TheICscanbeoperatedusingPulse-WidthModulation(PWM)dimmingandhasmanyprotectionfeaturesincludingeasyLEDtemperaturefeedback.SSL2108X主要特性和優(yōu)勢：LEDdriverICfamilydrivingstringsvofLEDsfromarectifiedmainssupplyHigh-efficiencyswitchmodebuckvdriverproductfamily:Driverswithintegrated300Vor600VpowersswitchesControllerwithpower-efficientboundaryconductionmodeofvoperationwith:Noreverserecoverylossesinfreewheel。diodeZeroCurrentSwitching(ZCS)forturn-onofswitchoZerouvoltageorvalleyswitchingforturn-onofswitchMinimalrequireduinductancevalueandsizeDirectPWMdimmingpossiblevFastvtransientresponsethroughcycle-by-cyclecurrentcontrol:NegligibleACumainsrippleatLEDcurrentandminimaltotalcapacitorvalueNooveroruundershootsintheLEDcurrentNobinningonLEDforwardvoltagevrequiredInternalProtections:vUnderVoltageLockOutu(UVLO)保護(hù)功能如欠壓鎖住(UVLO)Leading-EdgeBlanking(LEB)u前沿消隱(LEB)OverCurrentProtectionu(OCP)過流保護(hù)(OCP)Short-WindingProtection(SWP)u短繞組保護(hù)(SWP)InternalOverTemperatureuProtection(OTP)超溫保護(hù)(OTP)Brownoutprotectionu燈火保護(hù)OutputShortProtectionu(OSP)短路保護(hù)(OSP)LowcomponentcountLEDdriversolution*很少的元器件數(shù)量了LED驅(qū)動(dòng)電源NoSchottkydiodeurequiredduetoZCS由于零電流開關(guān)導(dǎo)致無肖特基二極管Nodimswitchandhigh-sidedriverrequiredforPWMudimming對于PWM調(diào)制無電源開關(guān)和高速驅(qū)動(dòng)需求Easyexternaltemperatureprotectionwithoutadditionalucomponents沒有附加組件，容易外部溫度保護(hù)Optionforsoft-startfunctionu軟啟動(dòng)Slopcompensate斜波補(bǔ)償Samplevt.取樣；嘗試；抽樣檢查Slewrate轉(zhuǎn)換速率，轉(zhuǎn)換速度HpatibleduringstandbylIClifetimeeasilymatchesorsurpassesLEDvlamplifetimeVSSL2108X應(yīng)用：SSL2108XproductsareintendedforcompactLEDlampballastswithaccuratefixedcurrentoutputforsinglemainsinputvoltages.Mainsinputvoltagesinclude100V120Vand230V(AC).TheoutputsignalcanbemodulatedusingaPWMsignal.SSL2108X出現(xiàn)，目的是，對于緊湊非調(diào)光LED燈在單一電源輸入電壓情況下輸出精密固定的電流，電源電壓包括100V,120V和230V，運(yùn)用一個(gè)PWM信號(hào)輸出信號(hào)可以調(diào)整JFET結(jié)型場效應(yīng)管Internalregulatorandbandgap內(nèi)部的調(diào)節(jié)器和帶隙Thermalshutdown熱關(guān)閉Logiccontrolandprotection邏輯控制和保護(hù)Por上電復(fù)位(PowerOnReset)Valleydetection山谷檢測TOFFMAX最大關(guān)斷時(shí)間LOGIC邏輯BLANKMagnetization磁化圖1.SSL2108X方框圖圖2.SSL2108X基本應(yīng)用框圖GNDGNDDVDTSSL210811，S5L210836A00faan69ff圖3.SSL21081/SSL21083降壓轉(zhuǎn)換器配置圖LED*虹*MIEL1 F=l—ionRGND—maingRGND如LED*虹*MIEL1 F=l—ionRGND—maingRGND如tou財(cái)域C3LEOl.-.fl7"0￡DRAINSOJRCEGNDDVDTTQNMAXGNDGNDSSL21082i妙SSL210B4$圖4.SSL21082/SSL21084降壓轉(zhuǎn)換器配置圖火線電壓230VAC50Hz評估板Theboardisoptimizedfora230V(AC,50Hz)mainssupply.Inadditiontothemainsvoltageoptimization,theboardisdesignedtoworkwithmultipleLEDsoranLEDmodulewithahighforwardvoltage.Mainsconnectionofthisreferenceboardisdifferentfromothergeneralevaluation/demoboards.ConnectthemainstothescrewconnectorJ6.Remark:Themaximumratedvoltageoftheboardis280V(limitedbythevalueofelectrolyticcapacitorC1)or400V(DC).TheanodeoftheLEDloadisconnectedtopositivepositions1to3ofconnectorJ5.Thecathodeisconnectedtonegativepositions4to6ofconnectorJ5.UseanLEDstringwithaVFgreaterthan20voltonthisboard.Undertheexpectedconditions,theoutputcurrentis96mA.IftheratedcurrentoftheLEDdoesnotmeetthisspecification,thecurrentcanbeadjusted.

圖5.評估板外形圖評估板電源指標(biāo)：ParameterValueCommentACfineinputvoltage170V(AC)to260V(AC)meLaarcIsoptimizedfor230V(AC),50Hzoutputvoltage20V(DC)to130V(DC)OLrtputcurrent9emAatVo=92V(DC)±4%Vo=60V(DC)to120V(DC)MaximumpowerintoLEDload(^O[kiad)}12.5Wefficiency>94%96mApowerraciw0.6責(zé)10W；70V；96mAoutput0.5□t3W;70V;96mAoutputboarddimensronsI75nnmxS35mmx17.5mmtengtnxwidthxheigtit(internal)40mmx&3mmlengtri*width(external)operatingtemperalune-40°CtofrWOflcNICthresholdtemperature〔丁況"與)60aConboardNTCactivatesatjove60°CIEC61000-^2compliantyes巳>85/# *IEC55015compliantyessee皿金盟想鯉尸

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