SMPS_Demoboard_200W_2

PowerConversionVersion1.2,November2001ApplicationNoteAN-CoolMOS-06200WSMPSDemonstrationBoardAuthor:MarkoScherf,IliaZverevPublishedbyInfineonTechnologiesAG200WSMPSDemonstrationBoard2of25AN-CoolMOS-06V1.2Thisapplicationnotedescribesthe200WSMPSDemonstrationBoardwithInfineonpowerproductslikeCoolMOS,OptiMOS,TDA16888,SiCSchottkydiodethinQ!,smallsignalN-&P-channelMOSFETs.Contains1Features/Parameters..........................................................................................................32GeneralDescription/MainFunction....................................................................................43Construction/Heatsinks......................................................................................................44DescriptionofFunctionalPartGroups..................................................................................54.1PowerStages(“MainBoard”).........................................................................................54.1.1ACinput/EMIFilter..................................................................................................54.1.2PFCConverter.........................................................................................................54.1.3PWMConverter(TwoTransistorForward)...............................................................64.1.4SynchronousRectification........................................................................................64.2ControllingCircuitry(“ControlBoard”)............................................................................64.2.1GeneralDescriptionoftheCombi-ICTDA16888......................................................74.2.2PFCControl..............................................................................................................74.2.3PWMControl............................................................................................................74.2.4GateDriveCircuitry..................................................................................................75PowerLosses/Efficiency....................................................................................................86PowerLossSources............................................................................................................97ConductedEMIMeasurements..........................................................................................108Constructionofmagneticcomponents...............................................................................128.1PFCchoke....................................................................................................................128.2Maintransformer..........................................................................................................138.3Outputfilterchoke........................................................................................................149PCBLayout........................................................................................................................159.1MainBoard-Scaling1:1..............................................................................................159.2ControlBoard-Scaling1:1...........................................................................................1810BillofMaterials................................................................................................................1810.1MainBoard...................................................................................................................1810.2ControlBoard...............................................................................................................21200WSMPSDemonstrationBoard3of25AN-CoolMOS-06V1.21Features/ParametersParameters:-wideinputvoltagerange90-275V-outputpower200W-outputvoltages-5V/20Amax(loadresistance=0.25Ohm)-12V/8.3Amax(loadresistance=1.45Ohm)-activePowerFactorCorrectionboostconverteroperatesat200kHz-hardswitchingtwotransistorforwardconverteroperatesat200kHz-synchronousrectificationfor5Voutputoperatesat200kHzFeatures:-Infineon&EPCOScomponentsonboard-SecondgenerationofCoolMOSC2asPFC,PWMswitches-SiliconCarbide(SiC)SchottkydiodethinQ!asPFCdiode-OptiMOSassynchronousrectificationswitches-PFCandPWMcontrollerinoneIC-Highefficiency-Noexternalheatsinkrequired-Nominimumoutputloadrequired-Outputoverloadprotected-Outputshortcircuitprotected200WSMPSDemonstrationBoard4of25AN-CoolMOS-06V1.22GeneralDescription/MainFunctionTr.1ACin90-275VEMIFilterLinerecti-fication~~-+Boostinductor2parallelCoolMOS11N60C2SICSDP06S60CoolMOS11N60C2EMCONSDD04E60CoolMOS11N60C2EMCONSDD04E60OptiMOS80N032parallelOptiMOS80N03+5V20A+12V8AHighandLowSideDriverPFC/PWMControlTDA16888fPFC=fPWM=200kHzBlockDiagramTheSMPSDemoboardconsistsoftwopowerstages,aAC-DC-converterforpowerfactorcorrection(PFCsection)andaPWM-controlledDC-DC-converterconfiguredasatwo-transistorforwardtopology(PWMsection).ThePFCstageisastepup(boost)converterwhichservestoprovidea380VDC-busatitsou