Document 381-1
SMT PoE Transformer
s
This series of transformers is designed specifically for
PoweredDevices(PD)inIEEE802.3af-compliantPower
over Ethernet (PoE) applications.
They feature interleaved primary and secondary wind-
ings to minimize leakage inductance, and a separate
bias winding. Isolation is 1500 Vrms between the
primary and secondary windings.
Coilcraft’s PoE transformers are available in 6 Watt and
13 Watt output versions for a 250 kHz switching fre-
quency. Input is 36 – 72 Volt and the output of the bias
winding is 12 V, 0.2 A.
Thesepartscanbeorderedwithleadscoatedinlead-free
solder that make them compliant with RoHS standards.
Coilcraft can also custom engineer a transformer to
meet your specific requirements.
Coilcraft Designer’s Kit C172 contains samples of all parts.
To order, contact Coilcraft or visit http://order.coilcraft.com
to purchase on-line.
Inductance Inductance
Leakage
at 0 A2
at Ipk3
inductance4
max (µH)
Ipk3 Secondary
DCR max (Ohms)
Turns ratio
pri:sec pri:bias (A)
Part
Power
(W)
number1
10ꢀ (µH)
min (µH)
pri
sec bias
output
POE60F-18_
POE60F-25_
POE60F-33_
POE60F-50_
POE60F-12_
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
1.8 V, 3.3 A
2.5 V, 2.4 A
3.3 V, 1.8 A
5.0 V, 1.2 A
1 : 0.35 1 : 0.35 1.1 12.0 V, 0.5 A
POE13F-18_ 13
POE13F-25_ 13
POE13F-33_ 13
POE13F-50_ 13
POE13F-12_ 13
45.0
35.0
40.0
40.0
35.0
40.5
31.5
36.0
36.0
31.5
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
7.9
4.2
3.4
1.9
0.6
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
1.8 V, 7.2 A
2.5 V, 5.2 A
3.3 V, 3.9 A
5.0 V, 2.6 A
1 : 0.35 1 : 0.35 2.1 12.0 V, 1.1 A
1. When ordering, please specify packaging code:
POE13F-12D
Schematic
1,2
Packaging: D = 13″ machine-ready reel. EIA-481 embossed plastic
8,7
Secondary
5,6
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.
Primary
12,11
When ordering a RoHS-compliant part, add an “L” before the packaging
code: e.g. POE13F-12LD
2. Inductance is measured at 250 kHz, 0.3 Vrms.
3. Peak primary current drawn at minimum input voltage.
4. Leakage inductance is for the primary winding with the secondary
winding shorted.
10
Bias
3
5. Operating temperature range –40°C to +125°C.
6. Electrical specifications at 25°C.
Specifications subject to change without notice. Document 381-1 Revised 09/29/04