Document 592 Flyback Transformers • • • • For Texas Instruments LM5072 High Power PD Designed for 25 Watt PoE application Input range from 18 to 57 V Primary to secondary isolation: 1500 Vrms Auxiliary winding output: 11 V, 20 mA Core material Ferrite Terminations RoHS compliant tin-silver over tin over nickel over phos bronze. Other terminations available at additional cost. Weight 13.6 – 13.9 g Ambient temperature –40°C to +125°C Storage temperature Component: –40°C to +125°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: 44 mm wide, 0.4 mm thick, 32 mm pocket spacing, 11.9 mm pocket depth PCB washing Tested with pure water or alcohol only. For other solvents, see Doc787_PCB_Washing.pdf Part number1 FA2677-AL_ FA2898-AL_ FA2899-AL_ FA2900-AL_ FA2901-AL_ L at 0 A2 ±10% (µH) 50 50 50 50 50 L at Ipk3DCR max (mOhms)4 min (µH) pri sec aux 40.8 26 2.6 328 40.8 26 4.0 315 40.8 26 13 315 40.8 26 20 315 40.8 26 37 305 1. When ordering, please specify a packaging code: FA2898-ALD Packaging: D = 13″ machine ready reel. EIA-481 embossed plastic tape (175 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, 0.7 Vrms, 0 Adc. Turns ratio6 Leakage L (µH)5 pri : sec pri : aux 2.20 1 : 0.12 1 : 0.41 1.05 1 : 0.18 1 : 0.41 0.473 1 : 0.35 1 : 0.41 0.409 1 : 0.47 1 : 0.41 0.381 1 : 0.59 1 : 0.41 Ipk3 (A) 2.9 2.9 2.9 2.9 2.9 Output7 3.3 V, 7.5 A 5 V, 5 A 9 V, 2.8 A 12 V, 2.1 A 15 V, 1.7 A 3. Ipk is the peak current drawn at minimum input voltage. 4. DCR for the primary and the secondary is with windings connected in parallel. 5. Leakage inductance measured on the primary windings with all secondary pins shorted. 6. Turns ratios are with the primary windings and the secondary windings connected in parallel. 7. Output is with the secondary windings connected in parallel. 8. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. 1 2 12 11 10 Pri Sec 4 3 5 7 8 9 Aux 6 The primary windings and the secondary windings are to be connected in parallel on the PC board. Dimensions are in inches mm 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] Document 592 Revised 09/16/11 © 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.