Document 560 PoE Transformers For Silicon Laboratories Si3400 PD Controller • Designed for Power over Ethernet PD controllers for applications up to 10 Watts. • Operates in continuous conduction mode with 36 – 72 V input • 1500 Vrms isolation between primary and secondary Core material Ferrite Terminations RoHS tin-silver over tin over nickel over phos bronze. Other terminations available at additional cost. Weight 3.8 – 3.9 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 200 per 13″ reel Plastic tape: 32 mm wide, 0.5 mm thick, 24 mm pocket spacing, 11.2 mm pocket depth PCB washing Only pure water or alcohol recommended Part number1 FA2671-AL_ FA2672-AL_ FA2732-AL_ Power (W) 10 10 10 Inductance at 0 A2 ±10% (µH) 40.0 40.0 40.0 Inductance at Ipk3 min (µH) 36.0 36.0 36.0 DCR max (Ohms)4 pri sec 0.098 0.062 0.098 0.085 0.098 0.156 Leakage inductance max (µH)5 0.395 0.340 0.370 1. When ordering, please specify packaging code: Output 3.3 V, 3.0 A 5.0 V, 2.0 A 12.0 V, 0.83 A Dot above pin1 FA2672-ALD Packaging: D = 13″ machine-ready reel. EIA-481 embossed plastic tape (200 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 400 kHz, 0.4 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 2 and 3 with all secondary pins shorted. 6. Turns ratio is with 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. 0.450 max 11,43 0.004 /0,10 0.041 1,05 0.600 max 15,24 0.413 10,50 3 Pri Sec 8 7 0.024 0,60 8 1 0.080 2,03 0.460 11,68 0.050 1,27 0.50 max 12,7 1 4 5 6 2 Turns ratio6 Ipk3 pri : sec (A) 10 : 3 1.3 10 : 4 1.3 1:1 1.3 5 0.098 2,50 Dimensions are in Recommended 0.098 2,50 Land Pattern inches mm Secondary windings to be connected in parallel on PC board Specifications subject to change without notice. Please check our website for latest information. © Coilcraft, Inc. 2009 Document 560 Revised 10/29/08