研讨会_铝电解电容替换指引

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1、E-Capppreplacementguide-line(E70(E70modelevaluationmodelevaluationExplanation)Explanation)September8th,2011PPdtEiProductEngineeriiDngDeparttmenttMurataElectronicsTrading(Shenzhen)MurataElectronicsTrading(Shenzhen)Co.,LtdCo.,Ltd..MurataManufacturingMurataManufacturingCo.,LtdCo.,Ltd..Agenda:议程:ßBackgr

2、ound背景ßReplacementProcedure替换步骤ßAppeppedndix–E700aEvaluuatatioponExplaaanattioon附录-E70评估说明2Agenda:议程:ßBackground背景ßReplacementProcedure替换步骤ßAppeppedndix–E700aEvaluuatatioponExplaaanattioon附录-E70评估说明3BackgroundBackground::背景:capacitanceareaofeachcapacitor:不同种电容器的容量分布Film-capMLCCTantal-capEle-capAlumi

3、num-capEle-capTaPerformance:lowGeneraltypeOftenusedasde-couplingAlPrice:cheapPlPolymertytpeTaPerformance:highPerformance:highAlPrice:expensiveOftenusedassmoothing4BackgroundBackground::背景:Amount(QTY)Ratioofeachcapacitance:不同种电容器在不同容值范围内的比率35%Film-capExceptその他MLCC30%MLCC25%TheMLCC’sdemandamount(QTY)i

4、sbyfarmorethantheEle-cap’sdemandamount(QTY).20%ReplacementoRatiTarget!Ele-cap15%替换目标10%Ele-cap5%0%under10pF100pF1000ｐF0.01μF0.1μF1μF10μF100μF1000μF10ｐF～～～～～～～～～Capacitance5PerformancecomparisonPerformancecomparison::特性对比:©VariousperformancecomparisontablesofMLCCandelectrolyticcapacitorandMLCCCompari

5、sonItemsEleCapPolymerCapMLCCImpedance/ESR–FrequencyCBATransientResponseCBATemperaturerise-RipplecurrentCBABreakDownVoltageBreakDownVoltageCCACapacitance-Voltage(DC&AC)BBCCapacitance-TemperatureBBC•MLCCislowESRandlowESLcomparedwiththeEleCap.•MLCC’stransientresponseatthehighfrequencybandmorethantheres

6、onancefrequencythatdoesnotdepppgendonthecapacitancechangeisexcellentcomparedwithEleCap.•BecauseESR(temperaturerisinglevel)ofMLCCislowerthanthatoftheEleCap,MLCCcanrunlargeripplecurrentscomparedwiththeEleCap.•MLCC’svoltagg(etolerance(BDV))ishigghercompparedwiththeEleCap,p,thenitwillcontributetothesafe

7、design.•MLCChaveadependenceonthevolt.andtemp.,soitisnecessarytoconfirmtheeffectivecapacitanceinyourcircuit.•However,thereisnoiflinfluenceonthenoiseremovalbilitlabilitywhenthenoisefrequencyyouwanttorem