B66413 Datasheet, PDF (2/5 Pages) EPCOS – EFD/EV/DE Cores

EFD 15/8/5
Core
I E core with flattened, lower center leg
for especially flat transformer design
I For DC/DC converters
I EFD cores are supplied as single units
Magnetic characteristics (per set)
Σl/A = 2,27 mm^–1
l_e = 34 mm
A_e = 15 mm²
A_min = 12,2 mm²
V_e = 510 mm³
Approx. weight 2,8 g/set
B66413
15±0,4
5,3±0,15
11±0,35
FEK0417-2
Ungapped
Material
N49
A_L value
nH
600 + 30/– 20 %
N87
780 + 30/– 20 %
µ_e A_L1min P_V
nH W/set
Ordering code
1080 330 < 0,11
B66413-G-X149
(50 mT, 500 kHz, 100 °C)
1400 560 < 0,28
B66413-G-X187
(200 mT, 100 kHz, 100 °C)
Gapped
Material A_L value
µ_e
nH
N87
100 ± 10 %
180
160 ± 15 %
288
g
approx. mm
0,17
0,08
Ordering code
B66413-U100-K187
B66413-U160-L187
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
N87
Relationship between
air gap – A_L value
K1 (25 °C) K2 (25 °C)
29,7
– 0,676
Calculation of saturation current
K3 (25 °C) K4 (25 °C) K3 (100 °C) K4 (100 °C)
44,2
– 0,796
33,2
– 0,873
Validity range:
K1, K2: 0,10 mm < s < 1,00 mm
K3, K4: 30 nH < A_L < 280 nH
507 08/01