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EEV336M025A9GAA Datasheet(PDF) 8 Page - Kemet Corporation |
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EEV336M025A9GAA Datasheet(HTML) 8 Page - Kemet Corporation |
8 / 16 page 8 © KEMET Electronics Corporation • P.O. Box 5928 • Greenville, SC 29606 (864) 963-6300 • www.kemet.com A4002_EEV • 2/21/2014 Surface Mount Aluminum Electrolytic Capacitors – EEV Series, +105ºC Equivalent Series Resistance (ESR) EquivalentSeriesResistanceistheresistivecomponentoftheequivalentseriescircuit.ESRvaluedependsonfrequencyand temperatureandisrelatedtothetanδbythefollowingequation: ESR=EquivalentSeriesResistance(Ω) ESR = tanδ tanδ=DissipationFactor 2πfESC ESC = Equivalent Series Capacitance (F) f = Frequency (Hz) Tolerancelimitsoftheratedcapacitancemustbetakenintoaccountwhencalculatingthisvalue. Impedance (Z) Impedanceofanelectrolyticcapacitorresultsfromacircuitformedbythefollowingindividualequivalentseriescomponents: C o R e L C e C o R e L C e C o=Aluminumoxidecapacitance(surfaceandthicknessofthedielectric) R e=Resistanceofelectrolyteandpapermixture(otherresistancesnotdependingonthefrequencyarenotconsidered:tabs,plates, etc.) C e = Electrolyte soaked paper capacitance L=Inductivereactanceofthecapacitorwindingandterminals Impedanceofanelectrolyticcapacitorisnotaconstantquantitythatretainsitsvalueunderallconditions;itchangesdependingon frequency and temperature. Impedanceasafunctionoffrequency(sinusoidalwaveform)foracertaintemperaturecanberepresentedasfollows: Co Re L Ce 0.1 1 10 100 1000 10000 0.1 1 10 100 1000 Z [ohm] F [KHz] B C A 1/ω ω ω ω Co Re 1/ω ω ω ω Ce ωL |
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