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
• 1500 Vrms isolation from primary and bias to secondary
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.
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)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332
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
Only pure water or alcohol recommended
Inductance Inductance
DCR max (Ohms)
4
Part
Power
at 0 A
2
at
Ipk
3
number
1
(W)
±10% (µH)
min (µH) pri
sec bias
POE60F-18L_
6
75.0
67.5
0.195 0.005 0.195
POE60F-25L_
6
55.0
49.5
0.095 0.005 0.150
POE60F-33L_
6
65.0
58.5
0.138 0.007 0.180
POE60F-50L_
6
60.0
54.0
0.130 0.009 0.165
POE60F-12L_
6
55.0
49.5
0.095 0.017 0.150
POE13F-18L_
13
45.0
40.5
0.195 0.005 0.195
POE13F-25L_
13
35.0
31.5
0.095 0.005 0.150
POE13F-33L_
13
40.0
36.0
0.138 0.007 0.180
POE13F-50L_
13
40.0
36.0
0.130 0.009 0.165
POE13F-12L_
13
35.0
31.5
0.095 0.017 0.150
POE13F-19L_ 13
37.0
33.3
0.085 0.025 0.385
POE13F-24L_ 13
37.0
33.3
0.086 0.049 0.370
1. When ordering, please specify
packaging
code:
Leakage
inductance
5
max (µH)
8.0
4.6
3.9
2.3
0.7
7.9
4.2
3.4
1.9
0.6
0.4
0.4
Turns ratios
6
Ipk
3
pri :sec pri :bias (A)
Output
7
1 : 0.07 1 : 0.36 1.3
1.8 V, 3.3 A
1 : 0.08 1 : 0.33 1.2
2.5 V, 2.4 A
1 : 0.11 1 : 0.36 1.2
3.3 V, 1.8 A
1 : 0.15 1 : 0.35 1.1
5.0 V, 1.2 A
1 : 0.35 1 : 0.35 1.1 12 V, 0.5 A
1 : 0.07 1 : 0.36 2.3
1.8 V, 7.2 A
1 : 0.08 1 : 0.33 2.2
2.5 V, 5.2 A
1 : 0.11 1 : 0.36 2.2
3.3 V, 3.9 A
1 : 0.15 1 : 0.35 2.1
5.0 V, 2.6 A
1 : 0.35 1 : 0.35 2.0 12 V, 1.1 A
1 : 0.57 1 : 0.35 2.0 19.5 V, 0.67 A
1 : 0.67 1 : 0.33 2.0 24 V, 0.54 A
1
2
Pri
11
12
10
Bias
3
Primary windings and secondary windings
to be connected in parallel on PC board.
POE13F-12LD
Packaging: D
= 13″ machine-ready reel. EIA-481 embossed plastic tape (200 parts per
full reel).
B
= Less than full reel. In tape, but not machine ready. To have a leader and
trailer added ($25 charge), use code letter D instead.
2. Inductance is for the primary, measured at 250 kHz, 0.3 Vrms.
3. Peak primary current drawn at minimum input voltage.
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.
8. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
8
7
Sec
6
5
Specifications subject to change without notice.
Please check our website for latest information.
Document 381-1
Revised 10/28/08
© Coilcraft, Inc. 2009
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