C1495-AL COILCRAFT | Alldatasheet
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© Coilcraft, Inc. 2009 Specifications subject to change without notice. Please check our website for latest information. Flyback Transformers Document 445 Document 445 Revised 10/29/08 For National Semiconductor LM5070 PoE Interface – 13 Watt Inductance Inductance Leakage Part at 0 A 2 at Ipk3 DCR max (Ohms)4 inductance Turns ratio6 Ipk3 number1 ±10% (µH) min (µH) pri bias sec max (µH) 5 pri : sec pri : bias (A) Output 7 1. When ordering, please specify packaging code: C1586-ALD Packaging: D =1 3″ 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. 2 10 Bias Pri Sec 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. 0.080 2,03 0.500 12,70 0.530 13,46 0.039 1,00 0.512 13,00 0.699 17,75max 0.590 14,99 0.028 0,70 0.050 1,27 0.098 2,50 0.098 2,50 max max Recommended Land Pattern 0.004 /0,10 Dot above pin1 Secondary windings to be connected in parallel on the PC board 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 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. 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 Only pure water or alcohol recommended