NXP SSL2108x高效率通用照明LED驱动器参考设计

NXPSSL2108x高效率通用照明LED驱动器参考设计NXP公司的SSL2108x系列是高压集成电路，主要用来驱动通用照明的无调光的LED灯，效率大于95%.器件集成了300V或600V功率开关，具有多种保护功能如欠压锁住(UVLO),前沿消隐(LEB)，过流保护(OCP),短绕组保护(SWP),超温保护(OTP)以及短路保护(OSP)等.本文介绍了SSL2108X主要特性和优势，方框图，基本应用框图和降压转换器配置图以及评估板主要特性，电路图和材料清单(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主要特性和优势：LEDdriverICfamilydrivingstringsvofLEDsfromarectifiedmainssupplyHigh-efficiencyswitchmodebuckvdriverproductfamily:Driverswithintegrated300Vor600VpowersswitchesControllerwithpower-efficientboundaryconductionmodeofvoperationwith:Noreverserecoverylossesinfreewheel。diodeZeroCurrentSwitching(ZCS)forturn-onofswitchoZerouvoltageorvalleyswitchingforturn-onofswitchMinimalrequireduinductancevalueandsizeDirectPWMdimmingpossiblevFastvtransientresponsethroughcycle-by-cyclecurrentcontrol:NegligibleACumainsrippleatLEDcurrentandminimaltotalcapacitorvalueNooveroruundershootsintheLEDcurrentNobinningonLEDforwardvoltagevrequiredInternalProtections:vUnderVoltageLockOutu(UVLO)保护功能如欠压锁住(UVLO)Leading-EdgeBlanking(LEB)u前沿消隐(LEB)OverCurrentProtectionu(OCP)过流保护(OCP)Short-WindingProtection(SWP)u短绕组保护(SWP)InternalOverTemperatureuProtection(OTP)超温保护(OTP)Brownoutprotectionu灯火保护OutputShortProtectionu(OSP)短路保护(OSP)LowcomponentcountLEDdriversolution*很少的元器件数量了LED驱动电源NoSchottkydiodeurequiredduetoZCS由于零电流开关导致无肖特基二极管Nodimswitchandhigh-sidedriverrequiredforPWMudimming对于PWM调制无电源开关和高速驱动需求Easyexternaltemperatureprotectionwithoutadditionalucomponents没有附加组件，容易外部温度保护Optionforsoft-startfunctionu软启动Slopcompensate斜波补偿Samplevt.取样；尝试；抽样检查Slewrate转换速率，转换速度HpatibleduringstandbylIClifetimeeasilymatchesorsurpassesLEDvlamplifetimeVSSL2108X应用：SSL2108XproductsareintendedforcompactLEDlampballastswithaccuratefixedcurrentoutputforsinglemainsinputvoltages.Mainsinputvoltagesinclude100V120Vand230V(AC).TheoutputsignalcanbemodulatedusingaPWMsignal.SSL2108X出现，目的是，对于紧凑非调光LED灯在单一电源输入电压情况下输出精密固定的电流，电源电压包括100V,120V和230V，运用一个PWM信号输出信号可以调整JFET结型场效应管Internalregulatorandbandgap内部的调节器和带隙Thermalshutdown热关闭Logiccontrolandprotection逻辑控制和保护Por上电复位(PowerOnReset)Valleydetection山谷检测TOFFMAX最大关断时间LOGIC逻辑BLANKMagnetization磁化图1.SSL2108X方框图图2.SSL2108X基本应用框图GNDGNDDVDTSSL210811，S5L210836A00faan69ff图3.SSL21081/SSL21083降压转换器配置图LED*虹*MIEL1 F=l—ionRGND—maingRGND如LED*虹*MIEL1 F=l—ionRGND—maingRGND如tou财域C3LEOl.-.fl7"0£DRAINSOJRCEGNDDVDTTQNMAXGNDGNDSSL21082i妙SSL210B4$图4.SSL21082/SSL21084降压转换器配置图火线电压230VAC50Hz评估板Theboardisoptimizedfora230V(AC,50Hz)mainssupply.Inadditiontothemainsvoltageoptimization,theboardisdesignedtoworkwithmultipleLEDsoranLEDmodulewithahighforwardvoltage.Mainsconnectionofthisreferenceboardisdifferentfromothergeneralevaluation/demoboards.ConnectthemainstothescrewconnectorJ6.Remark:Themaximumratedvoltageoftheboardis280V(limitedbythevalueofelectrolyticcapacitorC1)or400V(DC).TheanodeoftheLEDloadisconnectedtopositivepositions1to3ofconnectorJ5.Thecathodeisconnectedtonegativepositions4to6ofconnectorJ5.UseanLEDstringwithaVFgreaterthan20voltonthisboard.Undertheexpectedconditions,theoutputcurrentis96mA.IftheratedcurrentoftheLEDdoesnotmeetthisspecification,thecurrentcanbeadjusted.

图5.评估板外形图评估板电源指标：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责10W；70V；96mAoutput0.5□t3W;70V;96mAoutputboarddimensronsI75nnmxS35mmx17.5mmtengtnxwidthxheigtit(internal)40mmx&3mmlengtri*width(external)operatingtemperalune-40°CtofrWOflcNICthresholdtemperature〔丁况"与)60aConboardNTCactivatesatjove60°CIEC61000-^2compliantyes巳>85/# *IEC55015compliantyessee皿金盟想鲤尸

图6.评估板电路图评估板材料清单：ComponenC1孔注 ■*■fe iivwJ—r+IlVu eViJFTLIT「旦FJUiJFTilLIETiOe^F：＜,：■：M,：-：：＜_：■：:＜_WX.X：＜.：■：：＜.：■：K.Z：＜,：■：:＜.：■：：■：.：■:&＞CXa：■::＜；■：X.：-：：＜.：■：:■:_＞：&：■：：＜,：■：：＜；•:：＜_：■：：＜；■:X,：-：曾＞：；■：：＜.：■：：■：,：■：：＜,：■：:■：.：■：X.M#：＜_XX.：■::■:.：■capacitor;100nF;10%;400VEPCOS：B32560J6104KC2capacitor;22uF;105P；400vPanasonic；ECA2GHGWR2C3capacitor1肝料10%；16V;0603AVX;O6D3YQ1O5KAT2AC4capacitor;InF;10%;1OQV;Q6C3WX；06031C102KAT2AC5capacitor;100pF;5%;630V；1206Yageo；CC1206JRNPOBBN101C6ca