2
09/06
Please read Cautions and warnings and
Important notes at the end of this document.
For xDSL line transformer
Foot print of EP7
Height of EP13
Optimized design for low distortion
Delivery mode: sets
Magnetic characteristics (per set)
l/A = 0.91 mm
1
l
e
= 15.7 mm
A
e
= 17.2 mm
2
A
min
= 13.9 mm
2
V
e
= 270 mm
3
Approx. weight 2.8 g/set
Gapped
Material
A
L
value
nH
s
approx.
mm
e
Ordering code
T38
63
3%
0.35
46
B65857A0063A038
100
3%
0.22
73
B65857A0100A038
160
4%
0.14
116
B65857A0160B038
200
4%
0.11
145
B65857A0200B038
250
5%
0.09
182
B65857A0250J038
315
6%
0.06
229
B65857A0315C038
400
7%
0.05
291
B65857A0400E038
T57
63
3%
0.35
46
B65857A0063A057
100
3%
0.22
73
B65857A0100A057
160
4%
0.14
116
B65857A0160B057
200
4%
0.11
145
B65857A0200B057
250
5%
0.09
182
B65857A0250J057
315
6%
0.06
229
B65857A0315C057
400
7%
0.05
291
B65857A0400E057
T66
63
3%
0.35
46
B65857A0063A066
100
3%
0.22
73
B65857A0100A066
160
4%
0.14
116
B65857A0160B066
200
4%
0.11
145
B65857A0200B066
250
5%
0.09
182
B65857A0250J066
315
6%
0.06
229
B65857A0315C066
400
7%
0.05
291
B65857A0400E066
FEP0008-O
9.4
7.2+0.4
7.5
0.2
_
4.6+0.4
1.70.1
2.3
9
0.4
_
0.4
_
)
s
3.4 0.2
_
4.4
gapped (one-sided)
)
B65857A
Core
EPX 7/9
4
09/06
Please read Cautions and warnings and
Important notes at the end of this document.
SMD coil former with gullwing terminals
Material:
GFR liquid crystal polymer (UL 94 V-0, insulation class to IEC 60085:
F max. operating temperature 155 C), color code black
Zenite 7130
[E41938 (M)], E I DUPONT DE NEMOURS & CO INC
Solderability: to IEC 60068-2-58, test Td, method 6 (Group 3): 245 C, 3 s
Resistance to soldering heat: to IEC 60068-2-58, test Td, method 6 (Group 3): 255 C, 10 s
permissible soldering temperature for wire-wrap connection on coil former: 400 C, 1 s
Winding:
see Data Book 2007, chapter "Processing notes, 2.1"
Sections
A
N
mm
2
l
N
mm
A
R
value
Terminals
Ordering code
1
4.1
22.9
191.8
8
B65858A1008T001
FEP0009-P
0,15
7,1
_
0,15
4,55
_
2,54
0,6
4,5
_
0,1
6,10,2
12,40,2
0,2
9,4
_
7,5 max.
0,6
2,54
Recommended PCB layout
13,6
2,5
1,2
7,62
5,950,1
3 x 2,54 = 7,62
3,45+0,15
Bottom view
10,90,25
B65858
Accessories
EPX 7/9
5
09/06
Ferrites and accessories
Cautions and warnings
Mechanical stress and mounting
Ferrite cores have to meet mechanical requirements during assembling and for a growing number
of applications. Since ferrites are ceramic materials one has to be aware of the special behavior
under mechanical load.
As valid for any ceramic material, ferrite cores are brittle and sensitive to any shock, fast changing
or tensile load. Especially high cooling rates under ultrasonic cleaning and high static or cyclic loads
can cause cracks or failure of the ferrite cores.
For detailed information see Data Book 2007, chapter "General Definitions, 8.1".
Effects of core combination on A
L
value
Stresses in the core affect not only the mechanical but also the magnetic properties. It is apparent
that the initial permeability is dependent on the stress state of the core. The higher the stresses are
in the core, the lower is the value for the initial permeability. Thus the embedding medium should
have the greatest possible elasticity.
For detailed information see Data Book 2007, chapter "General Definitions, 8.2".
Heating up
Ferrites can run hot during operation at higher flux densities and higher frequencies.
NiZn-materials
The magnetic properties of NiZn-materials can change irreversible in high magnetic fields.
Processing notes
The start of the winding process should be soft. Else the flanges may be destroid.
To strong winding forces may blast the flanges or squeeze the tube that the cores can no more
be mount.
To long soldering time at high temperature (>300 C) may effect coplanarity or pin arrangement.
Not following the processing notes for soldering of the J-leg terminals may cause solderability
problems at the transformer because of pollution with Sn oxyd of the tin bath or burned insulation
of the wire. For detailed information see Data Book 2007, chapter "Processing notes, 2.2".
The dimensions of the hole arrangement have fixed values and should be understood as a
recommendation for drilling the printed circuit board. For dimensioning the pins, the group of
holes can only be seen under certain conditions, as they fit into the given hole arrangement. To
avoid problems when mounting the transformer, the manufacturing tolerances for positioning the
customers' drilling process must be considered by increasing the hole diameter.
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