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TAP226010 Datasheet(PDF) 11 Page - AVX Corporation |
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TAP226010 Datasheet(HTML) 11 Page - AVX Corporation |
11 / 16 page MAY 2013 ■ 153 TAP/TEP Technical Summary and Application Guidelines 1.4.4 Temperature dependence of the impedance and ESR At 100 kHz, impedance and ESR behave identically and decrease with increasing temperature as the typical curves show. For maximum limits at high and low temperatures, please refer to graph opposite. 1.5 DC LEAKAGE CURRENT (DCL) 1.5.1 Leakage current (DCL) The leakage current is dependent on the voltage applied, the time, and the capacitor temperature. It is measured at +25°C with the rated voltage applied. A protective resist- ance of 1000 is connected in series with the capacitor in the measuring circuit. Three minutes after application of the rated voltage the leak- age current must not exceed the maximum values indicated in the ratings table. Reforming is unnecessary even after pro- longed periods without the application of voltage. 1.5.2 Temperature dependence of the leakage current The leakage current increases with higher temperatures, typical values are shown in the graph. For operation between 85°C and 125°C, the maximum working voltage must be derated and can be found from the following formula. V max = 1- (T-85) x VR volts 120 where T is the required operating temperature. Maximum limits are given in rating tables. 1.5.3 Voltage dependence of the leakage current The leakage current drops rapidly below the value corre- sponding to the rated voltage VR when reduced voltages are applied. The effect of voltage derating on the leakage current is shown in the graph. This will also give a significant increase in reliability for any application. See Section 3 (pages 155-157) for details. 1.5.4 Ripple current The maximum ripple current allowance can be calculated from the power dissipation limits for a given temperature rise above ambient. Please refer to Section 2 (page 154) for details. 10 1 0.1 -55 -40 -20 0 20 40 60 80 100 125 Temperature °C Temperature Dependence of the Leakage Current for a Typical Component Effect of Voltage Derating on Leakage Current 1 0.1 0.01 020 40 60 80 100 % of Rated Voltage (VR) TYPICAL RANGE 1/35 10/35 47/35 100 10 1 0.1 -55 -40 -20 0 +20 +40 +60 +80 +100 +125 Temperature T (C) Temperature Dependence of the Impedance and ESR |
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