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ECEV6.3G0R1R Datasheet(PDF) 3 Page - Panasonic Semiconductor |
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ECEV6.3G0R1R Datasheet(HTML) 3 Page - Panasonic Semiconductor |
3 / 9 page Aluminum Electrolytic Capacitor Design, Specifications are subject to change without notice. Ask factory for technical specifications before purchase and/ or use. Whenever a doubt about safety arises from this product, please inform us immediately for technical consulation without fail. – EE16 – Application Guidelines 1. Circuit Design Ensure that operational and mounting conditions follw the specified conditions detailed in the catalog and specification sheets. 1.1 Operating Temperature and Frequency Electrolytic capacitor electr ical par ameters are nor mally specified at 20 °C temperature and 120Hz frequency. These parameter s var y with changes in temper ature and fr equency. Circuit designers should take these changes into consideration. (1) Effects of oper ating temper ature on electr ical parameters a)At higher temper atures, leakage current and capacitance increase while equivalent series resistance(ESR) decreases. b)A t l o w er temperatures , leakage current and capacitance decrease while equivalent series resistance(ESR) increases. (2) Effects of frequency on electr ical par ameters a)At higher frequencies , capacitance and impedance decrease while tan δ increases. b)At lower frequencies, r ipple current generated heat will r ise due to an increase in equivalent ser ies resistance (ESR). 1.2 Operating Temperature and Life Expectancy (1) Expected life is affected by operating temperature. Generally, each 10 °C reduction in temperature will double the expected life. Use capacitors at the lo w est possib le tem p e r ature belo w the maximum guaranteed temperature. (2) If oper ating conditions e xceed the maxim u m guaranteed limit, rapid eIectr ical par ameter deterioration will occur, and irreversible damage will result. Check for maximum capacitor operating tempera- tures including ambient temperature, inter nal capacitor temperature rise caused by ripple current, and the eff ects of radiated heat from po wer transistors, IC?s or resistors. Avoid placing components which could conduct heat to the capacitor from the back side of the circuit board. (3)The for mula for calculating expected Iife at lower operating temperatures is as fllows; L2 = L1 x 2 where, L1: Guaranteed life (h) at temperature, T1 ° C L2: Expected life (h) at temperature,T2 °C T1: Maximum operating temperature ( °C) T2: Actual operating temperature, ambient temperature + temperature rise due to ripple currentheating( °C) A quick eference capacitor guide for estimating exected life is included for your reference. 2000 5000 10,000 20,000 50,000 100,000 200,000 120 110 100 90 80 70 60 50 40 8h/d 1 2 3 4 5 7 20 3 6 10 15 20 30 s Expected Life Estimate Quick Reference Guide s Failure rate curve 1. 85 °C2000h 2.105 °C1000h 3.105 °C2000h 4.105 °C5000h 1 2 3 4 (h) Years Years 24h operat- ion Time Initial failure period Life Time Random failure period Wear failure period T1 -T2 10 Mar. 2005 |
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