Document 445 Flyback Transformers For National Semiconductor LM5070 PoE Interface - 13 Watt * Flyback transformers for 13 W PoE applications * Designed to operate in continuous mode at 250 kHz with an input of 36 - 72 Vdc * 1500 Vrms isolation from primary and bias to secondary Core material Ferrite Terminations RoHS tin-silver (96.5/3.5) over tin over nickel over phos bronze. Other terminations available at additional cost. Weight 6.15 g Ambient temperature -40C to +85C Storage temperature Component: -40C to +85C. Tape and reel 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 175 per 13 reel Plastic tape: 32 mm wide, 0.5 mm thick, 28 mm pocket spacing, 12.93 mm pocket depth PCB washing Tested with pure water or alcohol only. For other solvents, see Doc787_PCB_Washing.pdf Inductance Part at 0 A2 number1 10% (H) C1495-AL_ 127 C1585-AL_ 127 C1586-AL_ 127 Inductance at Ipk3 min (H) 114.3 114.3 114.3 Leakage DCR max (Ohms)4 inductance pri bias sec max (H)5 0.255 0.310 0.024 1.25 0.222 0.348 0.039 0.950 0.199 0.308 0.129 0.650 1. When ordering, please specify packaging code: C1586-ALD Packaging: D = 13 machine-ready reel. EIA-481 embossed plastic tape (175 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. Dot above pin1 Turns ratio6 pri : sec pri : bias 1 : 0.166 1 : 0.50 1 : 0.25 1 : 0.50 1 : 0.50 1 : 0.50 Ipk3 (A) Output7 1.0 3.3 V, 4.0 A 1.0 5.0 V, 2.6 A 1.0 12 V, 1.08 A 2. 3. 4. 5. Inductance is for the primary, measured at 250 kHz, 0.2 Vrms, 0 Adc. Ipk is peak primary current drawn at minimum input voltage. DCR for the secondary is per winding. Leakage inductance measured between pins 3 and 4 with all other pins shorted. 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. 8. Electrical specifications at 25C. Refer to Doc 362 "Soldering Surface Mount Components" before soldering. 0.500 max 12,70 0.004 /0,10 0.039 1,00 0.512 13,00 1 Pri 0.028 0,70 10 0.080 2,03 0.590 14,99 inches Dimensions are in mm 0.050 1,27 6 0.098 2,50 1 Sec 9 10 4 2 Bias Recommended Land Pattern 0.530 max 13,46 5 8 7 3 0.699 max 17,75 1 0.098 2,50 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 Secondary windings to be connected in parallel on the PC board Document 445 Revised 10/29/08 (c) Coilcraft Inc. 2013 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. Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Coilcraft: C1586-ALB C1585-ALD C1586-ALD C1585-ALB C1495-ALD C1495-ALB