05100511| Datasheet

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EFD 20/10/7 Core
I E core with flattened, lower center leg

B66417

for especially flat transformer design
I For DC/DC converters I EFD cores are supplied as single units

Magnetic characteristics (per set)

l/A le Ae A min Ve

= 1,52 mm 1 = 47 mm = 31 mm2 = 31 mm2 = 1 460 mm3

Approx. weight 7,2 g/set

Ungapped Material N49 N87 AL value nH

ue

A L1min P V nH W/set

Ordering code

910 + 30/ 20 % 1100 750 1200 + 30/ 20 % 1440 660

B66417-G-X149 < 0,29 (50 mT, 500 kHz, 100 C) < 1,05 B66417-G-X187 (200 mT, 100 kHz, 100 C)

Gapped Material N87 AL value nH 100 10 % 160 10 %

ue
120 193

g approx. mm 0,49 0,25

Ordering code B66417-U100-K187 B66417-U160-K187

The A L value in the table applies to a core set comprising one ungapped core (dimension g = 0) and one gapped core (dimension g > 0).

Calculation factors (for formulas, see "E cores: general information", page 382) Material Relationship between air gap A L value K1 (25 C) N87 Validity range: 61,1 K2 (25 C) 0,699 Calculation of saturation current K3 (25 C) 85,4 K4 (25 C) 0,796 K3 (100 C) K4 (100 C) 75,7 0,873

K1, K2: 0,10 mm < s < 1,40 mm K3, K4: 50 nH < A L < 410 nH 510 08/01

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05100511 DATASHEET