SMT flyback transformers
EFD series
Series/Type:
Date:
B82802A
October 2012
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Identification/Classification 1
(header 1 + top left bar):
Identification/Classification 2
(header 2 + bottom left header bar):
SMT flyback transformers
EFD series
Series/Type: (bottom right header bar)
Preliminary data (optional):
(if necessary)
Department:
Date:
B82802A
EPCOS Ho PD
October 2012
EPCOS AG 2012. Reproduction, publication and dissemination of this publication, enclosures hereto and the information
contained therein without EPCOS' prior express consent is prohibited.
SMT flyback transformers
EFD series
B82802A
Construction
EFD type ferrite core
10 gull wing terminals
Features
Low profile SMT package with high
through-put power capability
Industry standard footprints
Compliant with JEDEC J-STD-020D
MSL level 1
RoHS compatible
Custom variations available (on request)
Applications
General purpose isolated DC/DC
converters (up to 55W)
Power over Ethernet ( PoE/12W and PoE
+/30W) Powered Devices(PD) and Power
Sourcing Equipment (PSD)
Marking
Manufacturer, middle block of ordering
code , date code, pin1 marker
Delivery mode and packing unit
44/56-mm blister tape , 330-mm Ø reel
Packing unit : 300 pcs./ reel (EFD15)
Packing unit : 160 pcs./ reel (EFD20)
Packing unit : 80 pcs./ reel (EFD25)
Dimensional drawing
EFD15
EFD20
EFD25
EPCOS Ho PD
Please read Cautions and warnings and
Important notes at the end of this document.
Page 2 of 7
October 2012
SMT flyback transformers
EFD series
B82802A
Schematic :
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
EPCOS Ho PD
Please read Cautions and warnings and
Important notes at the end of this document.
Page 3 of 7
October 2012
SMT flyback transformers
EFD series
B82802A
Technical data and measuring conditions
Input voltage V
in
Test voltage V
test
Main inductance L
Inductance tolerance
DC current I
DC
Operating frequency f
DC resistance R
max
Solderability
Operating temperature range
Characteristics and ordering codes
Ordering code
Core
Schematic L
μH
B82802A0012A215
B82802A0012A315
B82802A0030A220
B82802A0030A320
B82802A0055A225
B82802A0055A325
EFD15 Fig 1
EFD15 Fig 2
EFD20 Fig 3
EFD20 Fig 4
EFD25 Fig 5
EFD25 Fig 6
L
stray,max
Turns ratio
μH
(1-10):(2-9):(5-4)
(1-10):(2-9):(3-8):(5-4)
(1-10):(2-9):(5-4)
(1-10):(2-9):(5,4-7)
1:2.25:6.5
1:2.5:0.75:7.5
1:2.25:6.5
1:2.5:7.5
0.03
0.05
DC resistance R
max
(Ω)
Pri
100 3.0
100 3.0
40
40
22
22
1.5
1.8
1.5
1.2
Sec
V
out1
0.19
0.37
V
out2
V
out3
0.45 -
0.43 0.03
0.1
0.1
-
0.01
36 V DC … 60 V DC
1500 V AC
100 kHz, 100 mV, +25 °C
±10% at +25 °C
With I
DC
bias L
drop
approx. 20%
100 kHz
Measured at +25 °C, maximum values (specified per winding)
≥99.9
Sn or Sn96.5Ag3.0Cu0.5: +(245± 5) °C, (3±0.3) s
Wetting of soldering area:
≥95%
(to IEC 60068-2-58)
–40°C … +125°C
0.015 0.04
0.003 0.04
(1-10):(2-9):(3-8):(5-4) 1:2.25:0.75:6.5 0.018 0.04
(1-10):(2-9):(3-8):(5-4) 1:2.33:0.66:6.67 0.015 0.04
0.03 -
0.05 0.003
Ordering code
B82802A0012A215
B82802A0012A315
B82802A0030A220
B82802A0030A320
B82802A0055A225
B82802A0055A325
Core
EFD15
EFD15
EFD20
EFD20
EFD25
EFD25
Schematic
Fig 1
Fig 2
Fig 3
Fig 4
Fig 5
Fig 6
Power
W
V
out1
V/A
V
out2
V/A
V
out3
V/A
12
12
30
30
55
55
12/0.5
5.0/0.8
12/1.25
5.0/2.0
12/2.3
5.0/3.7
5.0/1.2
3.3/1.2
5.0/3.0
3.3/3.0
5.0/5.5
3.3/5.5
-
12/0.33
-
12/0.83
-
12/1.5
EPCOS Ho PD
Please read Cautions and warnings and
Important notes at the end of this document.
Page 4 of 7
October 2012
SMT flyback transformers
EFD series
B82802A
Taping and Packing
Item
DIM.
(mm)
Core
EFD15
EFD20
EFD25
Blister tape
W
T
44.0 0.5
44.0 0.6
56.0 0.6
±
0.3
±
0.05
A0
16.6
21.7
26.2
±0.1
B0
22.3
26.6
33.0
±0.1
P
24.0
32.0
44.0
±0.1
K0
8.6
11.6
14.6
±0.1
K1
8.1
10.6
13.8
±0.1
Reel
F
Φ
40.4 330.0
40.4 330.0
52.4 330.0
±0.1
±0.5
W1
44.0
44.0
56.0
±2.0
W2
48.0
48.0
60.0
±0.15
Tolerance
Blister tape
Reel
EPCOS Ho PD
Please read Cautions and warnings and
Important notes at the end of this document.
Page 5 of 7
October 2012
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