Datasheet

507 08/01
■ E core with flattened, lower center leg
for especially flat transformer design
■ For DC/DC converters
■ EFD cores are supplied as single units
Magnetic characteristics (per set)
Σl/A = 2,27 mm
–1
l
e
= 34 mm
A
e
= 15 mm
2
A
min
= 12,2 mm
2
V
e
= 510 mm
3
Approx. weight 2,8 g/set
Ungapped
Gapped
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)
Validity range: K1, K2: 0,10 mm < s < 1,00 mm
K3, K4: 30 nH < A
L
< 280 nH
Material A
L
value
nH
µ
e
A
L1min
nH
P
V
W/set
Ordering code
N49 600 + 30/– 20 % 1080 330 < 0,11
(50 mT, 500 kHz, 100 °C)
B66413-G-X149
N87 780 + 30/– 20 % 1400 560 < 0,28
(200 mT, 100 kHz, 100 °C)
B66413-G-X187
Material A
L
value
nH
µ
e
g
approx. mm
Ordering code
N87 100
± 10 % 180 0,17 B66413-U100-K187
160
± 15 % 288 0,08 B66413-U160-L187
Material Relationship between
air gap – A
L
value
Calculation of saturation current
K1 (25 °C) K2 (25 °C) K3 (25 °C) K4 (25 °C) K3 (100 °C) K4 (100 °C)
N87 29,7 – 0,676 44,2 – 0,796 33,2 – 0,873
FEK0417-2
4,65±0,15
11±0,35
5,3±0,15
g
15±0,4
2,4±0,1 0,2±0,1
7,5±0,15
5,5±0,2
B66413Core
EFD 15/8/5