PC44EPC19-Z datasheet(40/45 Pages) TDK

40 / 45 page

(39/44)

002-03 / 20100305 / e143.fm

• All specifications are subject to change without notice.

EPC Series EPC25B Cores

∗ Coil: ø0.23 2UEW 100Ts

NI limit vs. AL-value for

AL-value vs. Air gap length for

Temperature rise vs. Total loss for

PC44EPC25B gapped core (Typical)

PC44EPC25B core (Typical)

EPC25B core (Typical)

(Ambient temperature: 25°C)

PARAMETER

Core factor

mm–1

1.39

Effective magnetic path length

emm

46.2

Effective cross-sectional area

mm2

33.3

Effective core volume

mm3

1540

Cross-sectional center pole area

mm2

32.4

Minimum cross-sectional area

cp min. mm2

30.3

Cross-sectional winding area of core

Acw

mm2

62.1

Weight (approx.)

g11

20.4min.

25.1

±0.5

13.8

±0.2

8.78

±0.15

11.43

±0.15

Dimensions in mm

16.5min.

Part No.

AL-value (nH/N2)∗

Core loss (W) max.

Calculated output power

(forward converter mode)

100kHz, 200mT

PC44EPC25B-Z

1560±25% (1kHz, 0.5mA)

0.65(100°C)

45W (100kHz)

PC90EPC25B-Z

1400±25% (1kHz, 0.5mA)

0.8(100°C)

46W

PC95EPC25B-Z

2200±25% (1kHz, 0.5mA)

0.8/0.65/0.8(25°C/80°C/120°C)

47.6W

Note: The temperature rise is measured in the

room whose temperature and humidity are

fixed to 25°C and 45(%)RH. respectively.

(approx. 400

×300×300cm)

Measuring point

Coil

Core

102

103

AL-value(nH/N2)

103

104

102

101

Temperature: 100˚C

40%

20%

NI20%=13659×AL–1.0567

NI40%=11847×AL–1.0101

104

103

102

101

Air gap length(mm)

0.01

0.10

Center pole gap

Temperature: 25˚C

AL=73.312×lg –0.677

100

Total loss Pm(W)

1.5

2.5

0.5

Note: NI limit shows the point where the exciting

current is 20% and 40% away from its

extended linear part.

Measuring conditions • Coil: ø0.23 2UEW 100Ts

• Frequency: 1kHz

• Level: 0.5mA

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