196DLC(2003) Ver la hoja de datos (PDF) - Vishay Semiconductors
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196DLC Datasheet PDF : 6 Pages
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196 DLC
Vishay BCcomponents
Double Layer Capacitors
MEASURING OF CHARACTERISTICS
CAPACITANCE (C)
Capacitance shall be measured by constant current discharge method.
DISCHARGE CURRENT AS A FUNCTION OF RATED CAPACITANCE
PARAMETER
Rated capacitance, CR
Discharge current, ID
0.047
VALUE
0.1
0.22 0.33 0.47 0.68
1.0
0.1
1.0
UNIT
F
mA
LEAKAGE CURRENT (IL)
U
(V)
Leakage current shall be measured after 30 minutes
UR
application of rated voltage UR:
2.0
0
30 min
time
T (s)
Fig.4 Voltage diagram for capacitance measurement.
Capacitance value CR is given by discharge current ID, time
T and rated voltage UR, according to the following equation:
C(F ) = -I-D----(--m------A-U---)--R--×--(--V-1---0-)---––--3---2-×-----T----(--s----)
IL(µA) = V-1---0-(--V-–---4-)
V
Rs 100 Ω
C
Fig.7 Test circuit for leakage current.
A
V
C
CONSTANT
CURRENT
DISCHARGER
Fig.5 Test circuit for capacitance measurement.
INTERNAL RESISTANCE (RI) AT 1 KHz
RI(Ω) = V---1--C-0--(--–-V-3----)
1 mA
A
1 kHz
C
V
Fig.6 Test circuit for RI measurement.
10 2
IL
(µA)
10
1
2
3
4
5
1
1
10
20
30
40
time (hours) 50
Curve 1: 1.0 F, 5.5 V.
Curve 2: 0.47 F, 5.5 V.
Curve 3: 0.22 F, 5.5 V.
Curve 4: 0.1 F, 5.5 V.
Curve 5: 0.047 F, 5.5 V.
Rs = 100 Ω.
Fig.8 Typical leakage current as a function of time.
www.vishay.com
196
For technical questions contact: aluminumcaps1@vishay.com
Document Number: 28362
Revision: 17-Oct-03
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