Document Number: 28345

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Revision: 17-Jun-08

9

050/052 PED-PW

Aluminum Capacitors

Power Eurodin Printed Wiring

Vishay BCcomponents

RIPPLE CURRENT AND USEFUL LIFE

IMPEDANCE (Z)

Fig.27 Typical impedance as a function of frequency

10

2

10

-2

10

1

10

-1

Z

( )

Ω

10

10

2

10

3

10

4

10

5

10

6

10

7

f (Hz)

Curve 1: 470 µF, 385 V

Curve 2: 1000 µF, 250 V

Curve 3: 4700 µF, 100 V

Curve 4: 10 000 µF, 63 V

Curve 5: 47 000 µF, 10 V

Case Ø D x L = 40 x 70 mm

1

2

3

4

5

Fig.28 Typical impedance as a function of frequency

10

2

10

-2

10

1

10

-1

Z

( )

Ω

10

10

2

10

3

10

4

10

5

10

6

10

7

f (Hz)

1

2

3

Case Ø D x L = 40 x 100 mm

Curve 1: 6800 µF, 100 V

Curve 2: 15 000 µF, 63 V

Curve 3: 68 000 µF

2.7

2.6

2.5

2.4

2.3

2.2

2.1

2.0

1.9

1.8

1.7

1.6

1.5

1.4

1.3

1.1

0.8

1.0

0.5

0.0

1.2

IA

IR

40

50

60

70

80

90

100

110

(1)

life multiplier

I

I

Fig.29 Multiplier of useful life as a function of ambient temperature and ripple current load