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FFLC22MB4427 Datasheet(PDF) 9 Page - AVX Corporation |
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FFLC22MB4427 Datasheet(HTML) 9 Page - AVX Corporation |
9 / 9 page 50 ■ JUNE 2015 Medium Power Film Capacitors FFLC CALCULATION FORM SPECIFICATION CALCULATIONS Capacitance C (μF) Working voltage Uw (V) Rms current Irms (Arms) Frequency f (Hz) Ripple voltage Ur (V) Ambient temperature θamb (°C) Lifetime @ Uw,Irms and θamb hours Parasitic inductance L (nH) Cooling conditions PN Capacitance C (μF) Rated voltage Un (V) Serial resistance Rs (mΩ) Thermal resistance between Rth1 (°C/W) hot spot and case Thermal resistance between Rth2 (°C/W) case and ambient air Your choice Maximum ripple voltage Urmax = 0.2 Un Urmax = V The maximum ripple voltage of the selected capacitor must be in any case higher than the ripple voltage of your application Ratio Vw/Vn ρ = Uw/Un ρ = Joule losses Pj = RsxIrms2 Pj = W Dielectric losses Pd = Qxtg δ0=Qx 2.10-4 Pd = W Hot spot temperature θHS = θamb+(Pj+Pd)x(Rth1+Rth2) θHS = °C The hot spot temperature must be in any case lower than 85°C LIFETIME EXPECTANCY VS HOT SPOT TEMPERATURE AND VOLTAGE 1.4 1.3 1.2 1.1 1.0 0.9 0.8 100 1,000 10,000 100,000 1,000,000 Lifetime Expectancy (hours) θHS = 70ºC θHS = 85ºC θHS = 55ºC Expected lifetime at hot spot calculated and U = Uw |
Similar Part No. - FFLC22MB4427 |
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Similar Description - FFLC22MB4427 |
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