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ManualsBrandsEPCOS ManualsFerritesEFD Core EFD30/15/9
123
514 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 = 0,99 mm
–1
l
e
= 68 mm
A
e
= 69 mm
2
A
min
= 69 mm
2
V
e
= 4 690 mm
3
Approx. weight 24 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 < 2,00 mm
K3, K4: 70 nH < A
L
< 630 nH
Material A
L
value
nH
µ
e
A
L1min
nH
P
V
W/set
Ordering code
N87 2050 + 30/– 20 % 1610 1280 < 2,60
(200 mT, 100 kHz, 100 °C)
B66423-G-X187
Material A
L
value
nH
µ
e
g
approx. mm
Ordering code
N87 160
± 10 % 125 0,71 B66423-U160-K187
250
± 10 % 196 0,38 B66423-U250-K187
315
± 10 % 246 0,27 B66423-U315-K187
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 125 – 0,712 176 – 0,796 161 – 0,873
B66423Core
EFD 30/15/9

Summary of content (3 pages)