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 –40°C to +85°C Storage temperature Component: –40°C to +85°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 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 Leakage InductanceInductance 3 Turns ratio6 Ipk3 DCR max (Ohms)4inductance Part at 0 A2 at Ipk number1 ±10% (µH) min (µH) pri bias sec max (µH)5pri : sec pri : bias(A) Output7 C1495-AL_ 127 114.3 0.255 0.310 0.024 1.25 1 : 0.1661 : 0.50 1.0 3.3 V, 4.0 A C1585-AL_ 127 114.3 0.222 0.348 0.039 0.950 1 : 0.251 : 0.50 1.0 5.0 V, 2.6 A C1586-AL_ 127 114.3 0.199 0.308 0.129 0.650 1 : 0.501 : 0.50 1.0 12 V, 1.08 A 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 2. Inductance is for the primary, measured at 250 kHz, 0.2 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. 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 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. 0.500 max 12,70 0.004 /0,10 0.039 1,00 3 0.699 max 17,75 0.512 13,00 1 Pri 0.028 0,70 10 0.080 2,03 0.590 14,99 inches Dimensions are in mm 6 0.098 2,50 1 4 2 Sec 9 10 Bias Recommended Land Pattern 0.530 max 13,46 5 0.050 1,27 8 7 1 0.098 2,50 US +1-847-639-6400 [email protected] UK +44-1236-730595 [email protected] Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] Secondary windings to be connected in parallel on the PC board Document 445 Revised 10/29/08 © 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.