Document 381-1
Flyback Transformers for PoE
• Flyback transformers for 6 W and 13 W PoE applications
• Designed to operate with 36 – 72 V input at 250 kHz
• 1500Vrms.oneminuteisolationprimaryandbiastosecondary
Designer’s Kit C372 contains two samples of parts shown in bold
Core material Ferrite
Terminations RoHS tin-silver over tin over nickel over phos bronze.
Other terminations available at additional cost.
Weight 5.0 – 5.6 g
Ambient temperature –40°C to +125°C
Storage temperature Component: –40°C to +125°C.
Tape and reel packaging: –40°C to +80°C
Resistance to soldering heat Max three 40 second reflows at
+260°C, parts cooled to room temperature between cycles
Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C /
85% relative humidity)
Packaging 200 per 13″ reel Plastic tape: 44 mm wide, 0.4 mm thick,
28 mm pocket spacing, 9.6 mm pocket depth
PCB washing Tested to MIL-STD-202 Method 215 plus an additional
aqueous wash. See Doc787_PCB_Washing.pdf.
Inductance Inductance
Leakage
DCR max (Ohms)4
min (µH) pri sec bias
Turns ratios6
Part
Power
(W)
at0A2
at Ipk3
inductance5
Ipk3
number1
10ꢀ(µH)
max (µH) pri:sec pri:bias (A)
Output7
POE60F-18L_
POE60F-25L_
POE60F-33L_
POE60F-50L_
POE60F-12L_
6
6
6
6
6
75.0
55.0
65.0
60.0
55.0
67.5
49.5
58.5
54.0
49.5
0.195 0.005 0.195
0.095 0.005 0.150
0.138 0.007 0.180
0.130 0.009 0.165
0.095 0.017 0.150
8.0
4.6
3.9
2.3
0.7
1:0.07 1:0.36 1.3
1:0.08 1:0.33 1.2
1:0.11 1:0.36 1.2
1:0.15 1:0.35 1.1
1:0.35 1:0.35 1.1
1.8V, 3.3A
2.5V, 2.4A
3.3V, 1.8A
5.0V, 1.2A
12V, 0.5A
POE13F-18L_ 13
POE13F-25L_ 13
POE13F-33L_ 13
POE13F-50L_ 13
POE13F-12L_ 13
POE13F-19L_ 13
POE13F-24L_ 13
45.0
35.0
40.0
40.0
35.0
37.0
37.0
40.5
31.5
36.0
36.0
31.5
33.3
33.3
0.195 0.005 0.195
0.095 0.005 0.150
0.138 0.007 0.180
0.130 0.009 0.165
0.095 0.017 0.150
0.085 0.025 0.150
0.086 0.049 0.150
7.9
4.2
3.4
1.9
0.6
0.4
0.4
1:0.07 1:0.36 2.3
1:0.08 1:0.33 2.2
1:0.11 1:0.36 2.2
1:0.15 1:0.35 2.1
1:0.35 1:0.35 2.0 12V, 1.1 A
1:0.57 1:0.35 2.0 19.5V, 0.67A
1.8V, 7.2A
2.5V, 5.2A
3.3V, 3.9A
5.0V, 2.6A
1:0.67 1:0.33 2.0
24V, 0.54A
1. When ordering, please specify packaging code:
POE13F-12LD
1
2
8
7
Pri
Sec
Packaging: D = 13″ machine-ready reel. EIA-481 embossed plastic tape (200 parts per
full reel). Quantities less than full reel available: in tape (not machine
ready) or with leader and trailer ($25 charge).
11
12
6
5
B = Less than full reel. In an effort to simplify our part numbering system,
Coilcraft is eliminating the need for multiple packaging codes. When
ordering, simply change the last letter of your part number from B to D.
10
2. Inductance is for the primary, measured at 250 kHz, 0.3 Vrms.
3. Peak primary current drawn at minimum input voltage.
Bias
3
4. DCR for the primary and for the secondary are with the windings connected in parallel.
5. Leakage inductance is for the primary windings with the secondary windings shorted.
6. Turns ratios are with the primary the secondary windings connected in parallel.
7. Output of the secondary is with the windings connected in parallel. Bias winding output is
12 V, 20 mA.
Primary windings and secondary windings
to be connected in parallel on PC board.
8. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Document 381-1 Revised 05/05/22
US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2022
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
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