TCFG_C Datasheet, PDF (10/12 Pages) Rohm – Chip tantalum capacitors with (Fail-safe open structure type)

Tantalum capacitors
TCFG series C Case
Inrush current
Beware of inrush current.
Inrush currents are inversely proportional ESR. Large inrush currents can cause components failure.
100
10
1
0.1
0.1
33μF
33μF
15μF
4.7μF
100μF
4.7μF
47μF
22μF
tantalum capacitor
aluminum electrolysis
Vpp=10V llimit=20A
Pulse Width=500μs
Power OP Amp Slew Rate=10V/6μs
1
10
100
ESRΩ (100kHz)
Fig. 13 Maximum inrush current and ESR
Inrush current can be limited by means of a protective resistor.
100
10
R
I
=
V
0.476
1
I=
V
0.476+R
R=0Ω
SAMPLE 16V−3.3μF
Pulse width=500μs
Slew rate=10V−6μc
Current limit=20A
0.25
0.5
1.0
2.0
5.0
0.1
0.1
1
10
100
V (V)
Fig. 14 Imax change due to protective resistor R
(10) Ultrasonic cleaning
Carry out cleaning under as mild conditions as possible. The internal element of a tantalum capacitor are larger than
those of a transistor or diode, so it is not as resistant as ultrasonic waves.
Example : water
Propagation speed
Solvent density
1500m / s
1g / cm³
Frequency and wavelength
Frequency Wavelength
20kHz
7.5cm
28kHz
5.3cm
50kHz
3.0cm
Rev.C 10/11