SVHB21V105M Datasheet, PDF (15/20 Pages) NEC – SURFACE MOUNT RESIN MOLDED TANTALUM CHIP CAPACITORS HIGH RELIABILITY

SV/H SERIES
2. Series resistance
As shown in Figure 1, reliability is increased by inserting a series resistance of at least 3 Ω/V into circuits where
current flow is momentary (switching circuits, charge/discharge circuits, etc.).
If the capacitor is in a low-impedance circuit, the voltage applied to the capacitor should be less than 1/2 to 1/3
of the rated DC working voltage.
10
1
0.1
0.1
1
10
100
Series Resistance (Ω/V)
Figure 1. Effects of Series Resistance
3. Ripple voltage
The sum of DC voltage and peak ripple voltage should not exceed the rated DC working voltage of the capacitor.
100
100
35 V
10 ^{25 V}
20 V
16 V
10 V
1
Case: A, B2
@ 25°C
35 V
10
25 V
20 V
16 V
10 V
1
Case: C, D2
@ 25°C
0.1
0.1
0.1
1
10
100
0.1
1
10
100
Frequency (kHz)
Frequency (kHz)
Figure 2. Permissible Ripple Voltage vs. Frequency
Figure 2 is based on an ambient temperature of 25°C. For higher temperature, permissible ripple voltage shall
be derated as follows.
Permissible voltage @ 50°C = 0.7 × permissible voltage @25°C
Permissible voltage @ 85°C = 0.5 × permissible voltage @25°C
Permissible voltage @ 125°C = 0.3 × permissible voltage @25°C
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