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Table.2 Hz VS K
Frequency
120
400
1k
10k
20k
40k
100k
1M
▶ Ripple Voltage
If an excessive ripple voltage is applied to the tantalum capacitors, their internal temperature
rises due to Joule heat, resulting in the detriment of their reliability.
▷ The tantalum capacitors must be used in such a conditions that the sum of the Working Voltage
and ripple voltage peak values does not exceed the rated voltage (Fig. 5)
▷ Ensure that an reverse voltage due to superimposed voltages is not applied to the capacitors.
▷ The maximum permissible ripple voltage varies with the rated voltage. Ensure that ripple voltage does
not exceed the values shown in Figs 6 and 7. If, however, the capacitors are used at a high
temperature, the maximum permissible ripple voltage must be calculated as follows:
Vrms(at 55℃) = 0.7 x Vrms(at 25℃)
Vrms(at 85℃) = 0.5 x Vrms(at 25℃)
Vrms(at 125℃) = 0.3 x Vrms(at 25℃)
10
K
1.0
1.0
0.8
0.65
0.1
0.50
0.45
0.43
0.01
100
0.40
0.35
1K
10K
100K
FREQUENCY(Hz)
Fig.4 Correction Coefficient(K)
1M
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