TAJB335016 datasheet(33/51 Pages) AVX

33 / 51 page

1.3.3 Frequency dependence of Dissipation Factor.

Dissipation Factor increases with frequency as shown in the

typical curves:

1.3.4 Temperature dependence of Dissipation

Factor.

Dissipation factor varies with temperature as the typical

curves show. For maximum limits please refer to ratings

tables.

1.4 IMPEDANCE, (Z) AND EQUIVALENT

SERIES RESISTANCE (ESR)

1.4.1 Impedance, Z.

This is the ratio of voltage to current at a specified frequency.

Three factors contribute to the impedance of a tantalum

capacitor; the resistance of the semiconductor layer; the

capacitance value and the inductance of the electrodes

and leads.

At high frequencies the inductance of the leads becomes

a limiting factor. The temperature and frequency behavior

of these three factors of impedance determine the behavior

of the impedance Z. The impedance is measured at 20°C

and 100kHz.

1.4.2 Equivalent Series Resistance, ESR.

Resistance losses occur in all practical forms of capacitors.

These are made up from several different mechanisms,

including resistance in components and contacts, viscous

forces within the dielectric and defects producing bypass

current paths. To express the effect of these losses they are

considered as the ESR of the capacitor. The ESR is frequency

dependent and can be found by using the relationship;

ESR =

tan

πfC

Where f is the frequency in Hz, and C is the capacitance in

farads.

The ESR is measured at 20°C and 100kHz.

ESR is one of the contributing factors to impedance, and

at high frequencies (100kHz and above) it becomes the

dominant factor. Thus ESR and impedance become almost

identical, impedance being only marginally higher.

1.4.3 Frequency dependence of Impedance and ESR.

ESR and Impedance both increase with decreasing frequency.

At lower frequencies the values diverge as the extra contri-

butions to impedance (due to the reactance of the capacitor)

become more significant. Beyond 1MHz (and beyond the

resonant point of the capacitor) impedance again increases

due to the inductance of the capacitor.

DF vs. FREQUENCY

(TPSE107M016R0100)

100

1000

10000

100000

Frequency (Hz)

500

450

400

350

300

250

200

150

100

DF vs. TEMPERATURE

(TPSE107M016R0100)

-40

-20

100

125

Temperature (

°C)

ESR vs. FREQUENCY

(TPSE107M016R0100)

0.1

0.01

100

1000

10000

100000

1000000

Frequency (Hz)

0.1

0.01

Frequency (Hz)

100

1000

10000

100000

1000000

IMPEDANCE vs. FREQUENCY

(TPSE107M016R0100)

Technical Summary and

Application Guidelines

TAJB335016 Datasheet(PDF) 33 Page - AVX Corporation

TAJB335016 Datasheet(HTML) 33 Page - AVX Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51

Datasheet Download

Link URL