Ferroxcube
U, I cores and accessories
CORE SETS
Effective core parameters measured in combination
with U25/16/6
SYMBOL
Σ(I/A)
V
e
I
e
A
e
m
PARAMETER
core factor (C1)
effective volume
effective length
effective area
mass of I core
VALUE
1.59
2590
64.3
40.3
≈
4.5
UNIT
mm
−1
mm
3
mm
mm
2
g
Dimensions in mm.
I25/6/6
(376B250)
handbook, halfpage
25.4
+0.64
−0.25
6.4
±0.13
CBW139
Fig.1 I25/6/6 core.
Core halves
A
L
measured in combination with
“U25/16/6”
.
GRADE
3C81
3C90
3C91
3C94
3C11
3E27
A
L
(nH)
1750
±25%
1500
±25%
1750
±25%
1500
±25%
2500
±25%
3000
±25%
µ
e
≈
2210
≈
1900
≈
2210
≈
1900
≈
3160
≈
3800
TYPE NUMBER
I25/6/6-3C81
I25/6/6-3C90
I25/6/6-3C91
I25/6/6-3C94
I25/6/6-3C11
I25/6/6-3E27
Properties of core sets under power conditions
Measured in combination with
“U25/16/6”.
B (mT) at
GRADE
H = 250 A/m;
f = 25 kHz;
T = 100
°C
≥320
≥320
≥320
≥320
f = 25 kHz;
ˆ
= 200 mT;
B
T = 100
°C
≤
0.6
≤
0.3
−
−
CORE LOSS (W) at
f = 100 kHz;
ˆ
B = 100 mT;
T = 100
°C
−
≤
0.3
≤
0.18
(1)
≤
0.23
f = 100 kHz;
ˆ
B = 200 mT;
T = 100
°C
−
−
≤
1.2
(1)
≤
1.6
3C81
3C90
3C91
3C94
Note
1. Measured at 60
°C.
2008 Sep 01
1322
Ferroxcube
U, I cores and accessories
DATA SHEET STATUS DEFINITIONS
DATA SHEET
STATUS
Preliminary
specification
Product specification
PRODUCT
STATUS
Development
DEFINITIONS
I25/6/6
(376B250)
This data sheet contains preliminary data. Ferroxcube reserves the right to
make changes at any time without notice in order to improve design and
supply the best possible product.
This data sheet contains final specifications. Ferroxcube reserves the right
to make changes at any time without notice in order to improve design and
supply the best possible product.
Production
DISCLAIMER
Life support applications
These products are not designed for use in life support appliances, devices, or systems
where malfunction of these products can reasonably be expected to result in personal injury. Ferroxcube customers
using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Ferroxcube
for any damages resulting from such application.
PRODUCT STATUS DEFINITIONS
STATUS
Prototype
Design-in
Preferred
Support
INDICATION
DEFINITION
These are products that have been made as development samples for the purposes of
technical evaluation only. The data for these types is provisional and is subject to
change.
These products are recommended for new designs.
These products are recommended for use in current designs and are available via our
sales channels.
These products are
not
recommended for new designs and may not be available
through all of our sales channels. Customers are advised to check for availability.
2008 Sep 01
1323
PCB Design
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