Bergquist-MCPCBs-and-Thermal-Interface-Material-Considerations-for-High-Power-LED-Lighting-Applications-SanDiego-Oct.2010.pdf

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1、BergquistTheWorldLeaderInThermalManagementTechnologyOSRAMLLFYWORKSHOPOCT28,2010MCPCB’sandThermalInterfaceMaterialConsiderationsforHighPowerLEDLightingApplicationsSteveTaylorSr.FieldApplicationsManagerThermalSubstratesDivisionTheBergquistCompanyAcknowledgements:JustinKolbe–Sr.DevelopmentE

2、ngineer,BergquistCompanySanjayMisra–DirectorofResearch&Development,BergquistCompanyBergquistTheWorldLeaderInThermalManagementTechnologyMCPCB’sandTIMConsiderationsforHighPowerLEDLightingApplicationsOutlineThermalmanagementiskeytoyourdesignThermalperformanceofhighpowerLED’sUnderstanding

3、thermalperformance(referencedata)MCPCBmaterialoptionsandpartgeometryTIMselectionconsiderations,optionsthatareavailableConclusionsBergquistTheWorldLeaderInThermalManagementTechnologyImportanceofThermalManagementofHighPowerLED’sOnly~15-30%ofinputpowerisconvertedtolightTheremaining70-8

4、5%ofinputpowerisconvertedtoheatExcessiveheatcancauseashiftincolorExcessiveheatcanreducelightoutputExcessiveheatcanshortendevicelifeIESNAHandbookOsramSylvaniaSource:PNNL-SA-51901,February2007BergquistTheWorldLeaderInThermalManagementTechnologyModelresultsComparisonofFR-4toIMSGoodtherma

5、lmanagementresultsinlowerjunctiontemperatureBergquistTheWorldLeaderInThermalManagementTechnologyCasestudyresultsThermalimpedanceofOsramDiamondDragononvarioussubstratesThermalResistanceofOsramDiamondDragononVariousSubstrates98765–IllustrationfromOsramDiamondDragonliteratureC/Wo432102layer

6、FR49holes2layerFR418holes1.1W/mK2.2W/mK57%improvementfrompopularFR-4configurationto2.2W/mKsolutionNote:thetwoFR-4samplesneededaninsulatorpadbetweentheboardandheatsinkadding0.2ºC/WBergquistTheWorldLeaderInThermalManagementTechnologyComparisonofthermalimpedanceofBergquistMPandHPLdielectric

7、sComponents:LEDGoldenDragon(chip1sqmm)(samewaferLot)MCPCB:Al1,57mmxDielectricx35µmcuResult:ThermalImpedanceZthBergquistMP1.8–2.0K/WBergquistHPL0.8–1.0K/W2ximprovementbyincreasingto3W/mKdielectricfrom1.1W/mKBergquistTheWorldLeaderInThermalManagementTechnologyLightOutputofD