不同种类电容特性比较.ppt

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1、INTRODUCTION元誠科技股份有限公司YuanChengTechnologyCo.,LtdByOliverChenGENERALPOPULARCAPACITORMulti-layerCeramicCapacitorOS-CONCapacitorAluminumElectrolyticCapacitorTantalumSolidElectrolyticCapacitorSpecialtyPolymerCapacitorPolymerOrganicSemi-conductiveCapacitorFilmCapacitorMulti-layerCeramicCapacitorSep

2、aratethesystemloopandthecapacitorsusedDigitalloopAnalogloopcombinedratioLogicloopHighFrequencyloopPowerloopAudioloopOtherloop~75%~25%DecouplingBackupMajorusedaroundDigitalICtofilterNoiseSmoothingFilterResonantCouplingImpedance&ESRconsideredmoreimportantthancapacitanceMustconsidertemperaturecha

3、racteristicsandcapacitanceondesignLoopseparatedCapacitorFunctionsFactorofSoundMechanism(MLCC)・DielectricConstantofMaterial・DCBiasVoltage・FrequencyRange・LayoutofMotherBoardMechanismofSoundEffect(MLCC)VTime・PiezoElectricwithDC-Bias・VibrationofMLCCWithACCurrentElectrical　→MechanicalMotherBoardRes

4、onatedWithMLCC・BigSound(LikeSpeaker)SRFofMLCCBecomeLowerSoundEffectofMLCCPhenomenonAnalysisUnderstandingQualitativeAnalysisMechanismofVibration(Simulation)SolutionforPiezoEffectQuantitativeAnalysisVibration-SoundAnalysis

5、z

6、ESRFrequencyxcXLSRFSRF:SeriesResonanceFrequencySRF→fc=1/2πLC

7、Z

8、=ESR2+(X

9、C-XL)21.iftheworkingfrequency=SRF,XC-XL=0,

10、Z

11、=ESR2.iftheworkingfrequency

12、Z

13、dominatedbyXc3.iftheworkingfrequency>SRF,

14、Z

15、dominatedbyXLAboutMLCCImpedanceFeaturesTypicalESRandESLfactorsincapacitor(100K~10MHz)Impedance=R2+(2πfL–1/2πfc)2ESR(mΩ)ESL(πH)Multilayerceramiccapacitors5~301~2Tantalumel

16、ectrolyticcapacitors300~10002~6Aluminumelectrolyticcapacitors500~100004~10＊ValuesofTantalumelectrolyticcapacitormayvarydependingoncasesizeFREQUENCY(KHZ)FREQUENCY(KHZ)FREQUENCY(KHZ)FREQUENCY(KHZ)X7R12061UF/16VX7R12062.2UF/16VX7R12061.5UF/16VX7R12063.3UF/10VCapacitanceCharacteristicsofFrequencyE

17、SRCharacteristicsofFrequencyTemperatureCharacteristicsofCapacitanceNoBiasD/DconverteroutputD/DconverterinputOS-CONAluminumsolidcapacitorswithorganicsemi-conductiveelectrolyteFeaturesofOS-CONOS-CONisalowESRcapacitorESRofOS-CONisnotdepend