EFD 30/15/9
Core
B66423
q
E core with flattened, lower center leg
for especially flat transformer design
q
For DC/DC converters
q
EFD cores are supplied as single units
Magnetic characteristics
(per set)
危
l/A
l
e
A
e
A
min
V
e
= 0,99 mm
鈥?
= 68 mm
= 69 mm
2
= 69 mm
2
= 4 690 mm
3
Approx. weight
24 g/set
Ungapped
Material
A
L
value
碌
e
A
L1min
P
V
Ordering code
N67
N87
nH
nH
2050 + 30/鈥?20 % 1610 1280
2050 + 30/鈥?20 % 1610 1280
W/set
3,00
B66423-G-X167
(200 mT, 100 kHz, 100 藲C)
2,60
B66423-G-X187
(200 mT, 100 kHz, 100 藲C)
Gapped
Material
A
L
value
nH
碌
e
N67,
N87
160
鹵
10 %
250
鹵
10 %
315
鹵
10 %
125
196
246
g
approx.
mm
0,71
0,38
0,27
Ordering code
** = 67 (N67)
= 87 (N87)
B66423-U160-K1**
B66423-U250-K1**
B66423-U315-K1**
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
(see page
423
for formulas)
Material
Relationship between
air gap 鈥?/div>
A
L
value
K1
(25 藲C)
K2
(25 藲C)
125
鈥?0,712
125
鈥?0,712
Calculation of saturation current
N67
N87
Validity range:
K3
(25 藲C)
172
176
K4
(25 藲C)
鈥?0,820
鈥?0,796
K3
(100 藲C)
K4
(100 藲C)
166
鈥?0,881
161
鈥?0,873
K1, K2:
0,10 mm <
s
< 2,00 mm
K3, K4:
70 nH <
A
L
< 630 nH
Siemens Matsushita Components
556
1
2
