模块功率周次及热循环次数能力介绍

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1、APPLICATIONNOTEDate:2003-07Page1of5AN-Number:AN2003-x04Thisapplicationnotewillsummarizethepowerandthermalcyclingcapabil-ityofeupechighpowerIGBTmodules.Standardmodulesaredesignedfortheneedsofgeneralindustrialappli-cationswhiletractionmodulesfeaturespecificmeasuresforinc

2、reasedreliability.Theyarefulfillingeventheseverestspecificationscommonlyre-quiredbytractionorindustrialapplicationswithheavyloadcycles.Tractionmodulesareavailableinthevoltageclassesfrom1700Vupto6500V.TjunctionTDCBTcaseature[°C]rTcoolertempeSichipDCBt[s]Thepowercyclingc

3、apability,givenbythetemperatureexcursionsofthejunction,depictsthequalityofthebondwireswhilethethermalcyclingcapabilityspecifiesthematerialmatchingbetweenbaseplateandsubstrateinregardtotheircapabilitytosustainthermalstress.Formoredetailsonthis,seethePCIM2002paper“Thenew

4、6.5kVIGBTmodule:areliabledeviceformediumvoltageapplications”,availableoneupec´shompage(editorials).eupecGmbHMax-Planck-Straße5D-59581WarsteinAuthor:ThomasSchützeTel.+49(0)2902764-1153Fax+49(0)2902764-1150Email:thomas.schuetze@eupec.comAnInfineonTechnologiesCompanywww.e

5、upec.comPOWERANDTHERMALCYCLINGCAPABILITYDate:2003-07Page2of5AN-Number:AN2003-04ThepowercyclingdiagramTestsareperformedbytemperatureswingswhichcommonlyreachaTjmaxof125°C(e.g.thevalueforDTj=40Kisderivedfromcyclesbetween85°Cand125°C).Failureindicatorisanincreaseoftheforwa

6、rdvoltageby5%.Withthis,theparametersarestillwithinthelimitsofthedatasheetandtheswitchingcharacteristicsarewithinthespecification!1,0E+111,0E+10dottedlines:estimated1,0E+091,0E+08tractionmodulesTjmax=125°C1,0E+07no.ofcyclesstandardmodules1,0E+06Tjmax=125°C1,0E+051,0E+04

7、10deltaTjinK100Powercyclingcapabilityofstandardandtractionmodulesat125°CAgainstformerlypublisheddiagrams,thestandardcurveisnowextendedwidelyintothedirectionoflowerDTj.Actualmeasurementsconfirm200Mio.cyclesat19K.Theabovefailurecriteriawasstillnotreachedwhenstoppingthete

8、stduetomaterialfatigueintheteststand.Consideringthegainofreliabiltybetweenstandardandtractiontechnology,predictionsin