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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 -40C to +125C Storage temperature Component: -40C to +125C. Packaging: -40C to +80C Resistance to soldering heat Max three 40 second reflows at +260C, parts cooled to room temperature between cycles Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30C / 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 A2 at Ipk3 number1 (W) 10% (H) min (H) 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 inductance5 max (H) 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 ratios6 Ipk3 pri :sec pri :bias (A) Output7 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 25C. 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
(c) Coilcraft, Inc. 2009
Document 381 -2
Flyback Transformers for PoE
Dot indicates pin 1
1 12
0.677 max 17,20
6 7
0.865 max 21,97
0.335 max 8,51
0.004 /0,10
0.079 2,01
0.693 17.60 0.590 14,98
6 7
0.028 0,72
0.135 3,43
1
0.665 16,88
0.098 2,5
12
1
12
0.098 2,5
Dimensions are in
inches mm
Recommended Land Pattern
0.07 1,79
Specifications subject to change without notice. Please check our website for latest information.
Document 381-2
Revised 10/28/08
(c) Coilcraft, Inc. 2009

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