不同种类电容特性比较ppt课件

.,1,INTRODUCTION,元誠科技股份有限公司,YuanChengTechnologyCo.,Ltd,ByOliverChen,.,2,GENERALPOPULARCAPACITOR,Multi-layerCeramicCapacitorOS-CONCapacitorAluminumElectrolyticCapacitorTantalumSolidElectrolyticCapacitorSpecialtyPolymerCapacitorPolymerOrganicSemi-conductiveCapacitorFilmCapacitor,.,3,Multi-layerCeramicCapacitor,Separatethesystemloopandthecapacitorsused,DigitalloopAnalogloop,combinedratio,LogicloopHighFrequencyloopPowerloopAudioloopOtherloop,75%,25%,DecouplingBackup,MajorusedaroundDigitalICtofilterNoise,SmoothingFilterResonantCoupling,Impedance&ESRconsideredmoreimportantthancapacitance,Mustconsidertemperaturecharacteristicsandcapacitanceondesign,Loopseparated,CapacitorFunctions,FactorofSoundMechanism(MLCC),DielectricConstantofMaterialDCBiasVoltageFrequencyRangeLayoutofMotherBoard,MechanismofSoundEffect(MLCC),PiezoElectricwithDC-BiasVibrationofMLCCWithACCurrentElectricalMechanical,MotherBoardResonatedWithMLCCBigSound(LikeSpeaker)SRFofMLCCBecomeLower,.,7,SoundEffectofMLCC,PhenomenonAnalysisUnderstanding,QualitativeAnalysisMechanismofVibration(Simulation),SolutionforPiezoEffect,QuantitativeAnalysisVibration-SoundAnalysis,|z|,ESR,Frequency,xc,XL,SRF,SRF:SeriesResonanceFrequency,SRFfc=1/2LC|Z|=ESR2+(XC-XL)21.iftheworkingfrequency=SRF,XC-XL=0,|Z|=ESR2.iftheworkingfrequencySRF,|Z|dominatedbyXL,AboutMLCCImpedanceFeatures,TypicalESRandESLfactorsincapacitor(100K10MHz),Impedance=R2+(2fL1/2fc)2,ValuesofTantalumelectrolyticcapacitormayvarydependingoncasesize,.,10,FREQUENCY(KHZ),FREQUENCY(KHZ),FREQUENCY(KHZ),FREQUENCY(KHZ),X7R12061UF/16V,X7R12062.2UF/16V,X7R12061.5UF/16V,X7R12063.3UF/10V,CapacitanceCharacteristicsofFrequency,ESRCharacteristicsofFrequency,.,14,TemperatureCharacteristicsofCapacitance,NoBias,D/Dconverteroutput,D/Dconverterinput,.,18,.,19,OS-CON,Aluminumsolidcapacitorswithorganicsemi-conductiveelectrolyte,FeaturesofOS-CONOS-CONisalowESRcapacitorESRofOS-CONisnotdependentontemperatureOS-CONhaslong-lifeOS-CONisacapacitorthathaspolaritybutthatisstrongagainstreversevoltageHighconductivityprovidesstabilityagainsttemperaturebecausehaslowresistancevaluecomparedtootherelectrolytes.,.,20,ReliabilityPresumptionofLife,L2=L1X10T2-(T1+Tx)/20,L2:Lifeexpectance(Hrs)inactualuse(temperatureT1),L1:Guaranteed(Hrs)atmaximumtemperatureinuse,T2:maximumoperatingtemperature(),T1:Temperatureinactualuse(ambienttemperature)(),Tx:Self-heatingtemperaturebyripplecurrent(),Tx=(Ix/Io)2xT,Io:Maximumallowableripplecurrentat+45orless(Arms),Ix:Actualflowofripplecurrent(Arms),Tvariesaccordingtocasesize,.,21,OS-CONElectricalCharacteristics,FrequencyCharacteristicsTemperatureCharacteristicsBiasCharacteristics,.,22,.,23,Temperaturevs.Tan,Temperaturevs.CapacitanceChange,Temperature(),Temperature(),A1uf/25WV,C10uf/16WV,F150uf/16WV,Tan,CapacitanceChange(%),(120HZ),(120HZ),.,24,A1uf/25WV,B10uf/10WV,C10uf/16WV,D47uf/6.3WV,E100uf/16WV,F150uf/16WV,Temperaturevs.Leakagecurrent,(RatedVoltage),Temperaturevs.Impedance,(100KHZ),Leakagecurrent(uA),Impedance(),Temperature(),Temperature(),.,25,TemperatureCharacteristics,100,ESR(),Temperature(),OS=OS-CONPurpleAl=Al-ECapBlueTa=TantalumGreenCR(X5P)=CeramicCapRedCR(X5U)=CeramicCap-Pink,.,26,TemperatureCharacteristics,OS=OS-CONPurpleAl=Al-ECapBlueTa=TantalumGreenCR(X5P)=CeramicCapRedCR(X5U)=CeramicCap-Pink,.,27,BiasVoltageCharacteristics,OS.1=OS-CON(10SL10M)-Purple,OS.2=OS-CON(30SC10M)-Lightpurple,CR(X5P)=CeramicCap(10uf/10V)-Red,CR(X5U)=CeramicCap(10uf/50V)-Pink,.,28,AluminumElectrolyticCapacitors,.,29,MaterialofAluminumElectrolyticcapacitor,.,30,CommonApplicationConditionstoAvoid,Thefollowingmisapplicationloadconditionswillcauserapiddeteriorationofacapacitorsparameters.Inaddition,rapidheatingandgasgenerationwithinthecapacitorcanoccur,causingthepressurereliefventtooperateandresultantleakageofelectrolyte.Underextremeconditions,explosionandfireignitioncouldhappen.Theleakedelectrolyteiscombustibleandelectricallyconductive,ReverseVoltageRepeatingCharge/DischargeapplicationsOverVoltageExceedingRipplecurrent,.,31,OperatingTemperatureandFrequency,(1)Effectofoperatingtemperatureonelectricalparametersa)Athighertemperature,leakagecurrentandcapacitanceincreasewhileESRdecreases.b)Atlowertemperature,leakagecurrentandcapacitancedecreaseswhileESRincreases.(2)Effectofoperatingfrequencyonelectricalparametersa)Athigherfrequency,capacitanceandimpedancedecreasewhiletanincreases.b)Atlowerfrequency,heatgeneratedbyripplecurrentwillriseduetoanincreaseinESR.,Applicationguidelines,.,32,OperatingTemperatureandLifeexpectancy,TheformulaforcalculatingexpectedlifeisasfollowsL1:Guaranteedlife(h)attemperature,T1L2:Expectedlife(h)attemperature,T2T1:Uppercategorytemperature()T2:Actualoperatingtemperature(),L2=L1X2T1-T2/10,*Example*,Ifthespecificationis2000hoursatratedvoltage/105testActually,thecapacitorsurfacetemperatureis85L2=2000hours*2105-85/10=8000hours,.,33,Howtocalculatetheripplecurrentforactualapplication,Ifthespecificationis1230mA/rmsat105/100KHzActualmeasurethecapacitorsurfacetemperatureis85/100KHzMaximumpermissibleripplecurrent=1230mA*1*1.7=2091mA/rms,*Example*,.,34,Capacitancevs.TemperatureCharacteristics,.,35,Impedance,ESRvs.FrequencyCharacteristics,.,36,Leakagecurrentvs.TemperatureCharacteristics,.,37,Tanvs.FrequencyCharacteristics,.,38,TantalumSolidElectrolyticCapacitor,.,39,MaterialofTantalumsolidelectrolyticcapacitor,.,40,CircuitDesign,.,41,Tantalumcapacitortemperaturede-ratingvoltage,.,42,Changeincapacitance(Dippedtype),4.7f/16V,Temperature(),Capacitancechange(%),TemperatureCharacteristics,.,43,Changeinleakagecurrent(Dippedtype),4.7f/16V,Leakagecurrent(A),Temperature(),TemperatureCharacteristics,.,44,Frequency(Hz),capacitancechange(%),Changeincapacitance(Dippedtype),4.7uf/16V,FrequencyCharacteristics,.,45,Frequency(Hz),ChangeinTan(Dippedtype),4.7f/16V,Tan,FrequencyCharacteristics,.,46,ReverseVoltage,.,47,SPECTIALTYPOLYMERCAPACITOR,.,48,MaterialofSpecialtyPolymerAluminumElectrolyticCapacitor,.,49,1000,100,10,1,0.1,0.01,TCNQ,MnO2,Electrolyte,Specialtypolymer,Organicsemi-conductive,Tantalum,Aluminum,SP-CAP,Conductivity(S/cm),Materialofelectrolytecomparison,.,50,SPECTIALTYPOLYMERCAPACITOR,FeaturesofSP-capLargecapacitanceVerylowESR&lowimpedancecharacteristicsStablecapacitancecharacteristicsHighripplecurrentcapabilityStrongsurgevoltagecharacteristicsFullvoltagecanbeapplied,novoltagede-rating,.,51,Resistivity.cm,Insulationofspecialtypolymeritself,.,52,FrequencyCharacteristics,.,53,FrequencyCharacteristics,.,54,StableTemperaturecharacteristics,.,55,StableTemperaturecharacteristics,.,56,(1)SP-Al100uf/6.3V(2)Polymertantalumcapacitor100uf/10V(3)Ceramiccapacitor100uf/6.3V(4)LowESRtantalumcapacitor100uf/10V,Stablecapacitancecharacteristics,.,57,(1)SP-Al100uf/6.3V(2)Polymertantalumcapacitor100uf/10V(3)Ceramiccapacitor100u