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| 型号： | T140A105J050DSC |
| 厂商： | KEMET Corporation |
| 英文描述： | TANTALUM HERMETICALLY SEALED / AXIAL |
| 中文描述： | 钽密封/轴流 |
| 文件页数： | 76/84页 |
| 文件大小： | 590K |
| 代理商： | T140A105J050DSC |
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KEMET
78
KEMET Electronics Corporation, P.O. Box 5928, Greenville, S.C. 29606 (864) 963-6300
monolithic ceramic capacitors) it is insignificant at the
basic measurement frequencies of 120 and 1000 Hz.
RS — Represents the actual ohmic series resistance
in series with the capacitance. Lead wires and capacitor
electrodes are contributing sources.
RL — Capacitor Leakage Resistance. Typically it can
reach 50,000 megohms in a tantalum capacitor. It can
exceed 1012 ohms in monolithic ceramics and in film
capacitors.
Rd — The dielectric loss contributed by dielectric
absorption and molecular polarization. It becomes very
significant in high frequency measurements and applica-
tions. Its value varies with frequency.
Cd — The inherent dielectric absorption of the solid
tantalum capacitor which typically equates to 1-2% of the
applied voltage.
As frequency increases, X
c continues to decrease
according to its equation above. There is unavoidable
inductance as well as resistance in all capacitors, and at
some point in frequency, the reactance ceases to be
capacitive and becomes inductive. This frequency is called
the self-resonant point. In solid tantalum capacitors, the
resonance is damped by the ESR, and a smooth, rather
than abrupt, transition from capacitive to inductive reac-
tance (XL = 2pfL) follows.
Typical ESR and Z performance is given for repre-
sentative capacitor ratings in Figures 9 through 11.
Measured impedance will be affected by the length of lead
wire included. Data for the curves were taken by including
1/2" of each lead wire in the measuring circuit.
Despite the fact that the reactance is entirely induc-
tive above the self-resonance, these capacitors find use
as decoupling devices above 10 MHz. Special designs
have been developed for minimum inductance and are
used above 100 MHz.
ESR and Z are also affected by temperature. At 100
kHz, ESR decreases with increasing temperature. The
amount of change is influenced by the size of the capaci-
tor and is generally more pronounced on smaller ratings.
13. POWER DISSIPATION
Permissible power dissipation has been empirically
established for all Series and is listed in each respective
product section.
See pages 6-41 for herm seal, 42-50 for axial and
radial molded, and 61-70 for tantalum dipped.
It is usually most convenient to translate the permis-
sible power into an AC voltage rating. Assuming a sinu-
soidal waveform, the “ripple voltage” permissible may be
calculated from the impedance and ESR data shown in the
respective product section. However, three criteria must
be observed:
APPLICATION NOTES FOR TANTALUM CAPACITORS
10VDC Rated
Frequency (MHz)
1
10
100
0.1
10
Fd
Impedance
ESR
(Ohms)
33
Fd
100
Fd
10
Fd
33
Fd
100
Fd
220
Fd
220
Fd
100
10M
1M
100K
10K
1000
ESR and Impedance vs. Frequency
Figure 9.
Frequency (MHz)
0.1
35VDC Rated
100
10M
1M
100K
10K
1000
Frequency (MHz)
1
10
100
0.1
Impedance
ESR
(Ohms)
2.7
Fd
4.7
Fd
22
Fd
47
Fd
2.7
Fd
47
Fd
22
Fd
4.7
Fd
Figure 11a.
ESR and Impedance vs. Frequency
20VDC Rated
Frequency (MHz)
1
3
10
0.1
Impedance
ESR
(Ohms)
47
Fd
100 Fd
0.3
30
47
Fd
68
Fd
68
Fd
100
Fd
100
10M
1M
100K
10K
1000
Figure 10.
ESR and Impedance vs. Frequency
10
1
0.1
-50
Temperature - Degrees Centigrade
-25
0
25
50
75
100
125
Multiplier of 100kHz ESR
Figure 11b Typical Effect of Temperature
on 100 kHz ESR
相关PDF资料 |
PDF描述 |
|---|---|
| T140A105J050MSC | TANTALUM HERMETICALLY SEALED / AXIAL |
| T140A105J050PSC | TANTALUM HERMETICALLY SEALED / AXIAL |
| T140A105J050RSC | SWITCHES, TYPE:REED SWITCH |
| T140A105J050SSC | TANTALUM HERMETICALLY SEALED / AXIAL |
| T1A6C | BI-DIRECTIONAL TRIODE THYRISTOR 1A MOLD TRIAC (AC POWER CONTROL) |
相关代理商/技术参数 |
参数描述 |
|---|---|
| T140A105J050MSC | 制造商:KEMET 制造商全称:Kemet Corporation 功能描述:TANTALUM HERMETICALLY SEALED / AXIAL |
| T140A105J050PSC | 制造商:KEMET 制造商全称:Kemet Corporation 功能描述:TANTALUM HERMETICALLY SEALED / AXIAL |
| T140A105J050RSC | 制造商:KEMET 制造商全称:Kemet Corporation 功能描述:TANTALUM HERMETICALLY SEALED / AXIAL |
| T140A105J050SSC | 制造商:KEMET 制造商全称:Kemet Corporation 功能描述:TANTALUM HERMETICALLY SEALED / AXIAL |
| T140A105K050ASC | 制造商:KEMET 制造商全称:Kemet Corporation 功能描述:TANTALUM HERMETICALLY SEALED / AXIAL |
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