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Document 460-1
For 3 Watt, 7 Watt and 13 Watt
Flyback Transformers PoE Applications
• Flyback transformers for PoE applications
• Designed to operate in continuous mode at 250 kHz with an
input of 36–72 Vdc
• 1500Vrms,oneminuteisolationfromprimaryandbiastosecond-
ary; 500 Vrms, 1 minute isolation between all other windings
Designer’s Kit C395 contains two of each part shown in bold
Core material Ferrite
Terminations RoHS tin-silver over tin over nickel over phos bronze.
Other terminations available at additional cost.
Weight POE13P: 6.15 g; POE70P: 3.85 g; POE30P: 2.05 g
Ambient temperature –40°C to +85°C
Max part temperature +125°C (ambient + temp rise)
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)
Failures in Time (FIT) / Mean Time Between Failures (MTBF)
38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332
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
Turns ratio6
Part
Power
(W) ±±0ꢀ (µH) min (µH) pri
at 0 A2
at Ipk3
inductance
Ipk3
number1
bias
sec max (µH)5 pri : sec pri : bias (A)
Output7
POE30P-33L_
POE30P-50L_
POE30P-±2L_
3
3
3
310
310
310
279.0
279.0
279.0
1.02
1.02
1.04
2.01
2.01
2.01
0.066
0.118
0.700
4.75
4.50
4.25
1 : 0.19
1 : 0.28
1 : 0.70
1 : 0.70
1 : 0.70
1 : 0.70
0.3
0.3
0.3
3.3 V, 0.91 A
5.0 V, 0.6 A
12 V, 0.25 A
POE70P-33L_
POE70P-50L_
POE70P-±2L_
7
7
7
155
155
155
139.5
139.5
139.5
0.414 0.822 0.036
0.414 0.822 0.060
0.414 0.822 0.343
4.00
3.60
3.25
1 : 0.19
1 : 0.262 1 : 0.667
1 : 0.667 1 : 0.667
1 : 0.667
0.65 3.3 V, 2.12 A
0.65 5.0 V, 1.4 A
0.65 12 V, 0.6 A
POE±3P-33L_
POE±3P-50L_
POE±3P-±2L_
POE13P-19L_
POE13P-24L_
13
13
13
13
13
127
127
127
127
127
114.3
114.3
114.3
114.3
114.3
0.255 0.310 0.024
0.222 0.348 0.039
0.199 0.308 0.065
0.290 0.355 0.066
0.255 0.315 0.067
1.25
1 : 0.166 1 : 0.50
1.0
1.0
1.0
3.3 V, 4.0 A
5.0 V, 2.6 A
12 V, 1.08 A
0.950
0.650
0.800
0.600
1 : 0.25
1 : 0.50
1 : 0.50
1 : 0.50
1 : 0.567 1 : 0.50
1 : 0.667 1 : 0.50
1.0 19.5 V, 0.67 A
1.0 24 V, 0.54 A
1. When ordering, please specify packaging code:
POE30P-±2LD
Packaging: D = 13″ machine-ready reel. EIA-481 embossed plastic
tape. Quantities less than full reel available: in tape
(not machine ready) or with leader and trailer ($25
charge).
Schematics
POE13P
POE70P, POE30P
8
7
6
5
3
3
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.
Pri
Sec
Pri
Sec
9
10
7
8
4
2
4
2
2. Inductance is for the primary, measured at 250 kHz, 0.1 Vrms, 0 Adc.
3. Ipk is peak primary current drawn at minimum input voltage.
4. DCR for the secondary is per winding.
5. Leakage inductance measured between pins 3 and 4 with all other pins
shorted.
Bias
1
Bias
1
6. Turns ratio is with 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.
Secondary windings to be con-
nected in parallel on PC board
Secondary windings to be con-
nected in parallel on PC board
8. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Document 460-1 Revised 11/04/20
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. 2020
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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