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594D Datasheet(PDF) 6 Page - Vishay Siliconix

Part No. 594D
Description  Solid Tantalum Chip Capacitors TANTAMOUNT, Conformal Coated, Maximum CV, Low ESR
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Maker  VISHAY [Vishay Siliconix]
Homepage  http://www.vishay.com
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594D Datasheet(HTML) 6 Page - Vishay Siliconix

   
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71
594D
Vishay Sprague
Document Number 40006
Revision 09-Mar-05
For technical questions, contact tantalum@vishay.com
PERFORMANCE CHARACTERISTICS (Continued)
8
ESR (Equivalent Series Resistance)
Measurement shall be made by the bridge method at a
frequency of 100kHz and a temperature of + 25°C.
8.1
The equivalent Series Resistance shall not exceed the
value listed in the Standard Ratings Table.
9.
Life Test: Capacitors shall withstand rated DC voltage
applied at + 85°C or two-thirds rated voltage applied at
+ 125°C for 2000 hours.
9.1
Following the life test, the dissipation factor shall meet
the initial requirement; the capacitance change shall
not exceed ± 10%; the leakage current shall not
exceed 125% of the initial requirement.
10.
Humidity Test: Capacitors will withstand 1000 hours
at + 40˚C, 90% to 95% relative humidity, with no
voltage applied.
10.1
Following the humidity test, capacitance change shall
not exceed ± 10% of the initial value, dissipation factor
shall not exceed 150% of the initial requirement;
leakage current shall not exceed 200% of the initial
requirement at + 25˚C.
11.
Solderability: Capacitors will meet the solderability
requirements of ANSI/J-STD-002, Test B, Category 3.
12.
Resistance to Soldering Heat: Capacitors mounted
on a substrate will withstand + 260°C for 5 seconds.
12.1
Following the resistance to soldering heat test,
capacitance, dissipation factor and DC leakage current
shall meet the initial requirement.
13.
Marking: The small body area of these capacitors
does not allow elaborate marking schemes. All
required information is present on the carton or
package in which the parts are shipped; in addition,
part number, quantity and date code are indicated on
the reels.
14.
Terminal Strength: Per IEC-384-3, minimum of 5N
shear force.
15.
Environmental: Mercury, CFC and ODS materials
are not used in the manufacture of these capacitors.
16.
Flammability: Encapsulant materials meet UL94 V0.
17.
Capacitor Failure Mode: The predominant failure
mode for solid tantalum capacitors is increased
leakage current resulting in a shorted circuit. Capaci-
tor failure may result from excess forward or reverse
DC voltage, surge current, ripple current, thermal
shock or excessive temperature.
The increase in leakage is caused by a breakdown of
the Ta
2O5 dielectric.
For additional information on
leakage failure of solid tantalum chip capacitors, refer
to Vishay Sprague Technical Paper, “Leakage Failure
Mode in Solid Tantalum Chip Capacitors.”
2.0
A-C Ripple Current: The maximum allowable
ripple current shall be determined from the formula:
where,
P = Power Dissipation in Watts @ + 25°C as given
in the table in Paragraph Number 6.0 (PowerDissipation)
RESR = The capacitor Equivalent Series Resistance
at the specified frequency.
3.0
A-C Ripple Voltage: The maximum allowable ripple
voltage shall be determined from the formula:
or, from the formula:
where,
P = Power Dissipation in Watts @ + 25°C as given in
the table in Paragraph Number 6.0 (Power Dissipation).
RESR = The capacitor Equivalent Series Resistance
at the specified frequency.
Z= The capacitor Impedance at the specified
frequency.
3.1
The sum of the peak AC voltage plus the DC voltage
shall not exceed the DC voltage rating of the capacitor.
P
RESR
Irms =
Vrms = Irms x Z
P
RESR
Vrms = Z
GUIDE TO APPLICATION
1.0
Recommended rated working voltage guidelines:
(-55°C to + 85°C)
Standard Conditions, for example; output filters
Capacitor Voltage Rating (V)
Operating Voltage (V)
4
2.5
6.3
3.6
10
6
16
10
20
12
25
15
35
24
50
28
Severe Conditions, for example; input filters
Capacitor Voltage Rating (V)
Operating Voltage (V)
4
2.5
6.3
3.3
10
5
16
8
20
10
25
12
35
15
50
24


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