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| Document 523 Flyback Transformer For National Semiconductor LM5071 PoE PD Controller * Designed to operate in continuous mode at 250 kHz * NSC App Note AN-1430 specifies 84% efficiency at 3 A. * 1500 Vrms isolation from primary and aux to secondary Core material Ferrite Terminations RoHS tin-silver over tin over nickel over phos bronze. Other terminations available at additional cost. Weight 5.97 g Ambient temperature -40C to +85C Storage temperature Component: -40C to +85C. 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 Only pure water or alcohol recommended Part number1 DA2383-AL_ L at 0 A2 10% (H) 127.0 L at Ipk3 min (H) 114.3 Input voltage (V) 24 -60 DCR max (Ohms) 0.310 (aux) 0.012 (sec) 0.255 (pri) Leakage L4 Turns max (H) ratios 1.25 2 : 1 (pri : aux) 6 : 1 (pri : sec ) Ipk3 (A) Outputs5 1.0 10 V, 0.05 A (aux) 3.3 V, 4.0 A (sec) 1. When ordering, please specify packaging code: DA2383-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. 2. Inductance is for the primary, measured at 200 kHz, 0.2 Vrms, 0 Adc. 3. Ipk is peak primary current drawn at minimum input voltage. 4. Leakage inductance measured on the primary winding with all secondary pins shorted. 5. Output of the seconday is with the windings connected in parallel. 6. Electrical specifications at 25C. Refer to Doc 362 "Soldering Surface Mount Components" before soldering. Dot above pin1 0.500 max 12,70 0.039 1,00 0.004 /0,10 0.699 max 17,75 0.512 13,00 5 6 5 Pri 8 9 Sec 7 6 0.028 0,70 0.080 2,03 1 0.590 14,99 0.050 1,27 4 1 Aux 0.530 max 13,46 1 10 Recommended Land Pattern 0.098 2,50 0.098 2,50 2 Secondary windings to be connected in parallel on the PC board Specifications subject to change without notice. Please check our website for latest information. Document 523 Revised 10/29/08 (c) Coilcraft, Inc. 2009 |
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