Document 1053 Flyback Transformer For TI TPS23756 15 W PoE Converter • Flyback for Texas Instruments TPS23756 Wide Input Range 15 W PoE Converter; shown on PMP6659 schematic and BOM • Input: 10.8 – 57 V • 1500 Vrms, one minute 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 11.3 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, 28 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. L at 0 A2 L at Ipk3 DCR max (Ohms)4 Turns ratio6 Part ±10% min Leakage L5 number1 (µH) (µH) pri sec bias drive max (µH) pri : sec pri : bias pri : drive MA5281-BL_ 45 40.5 0.060 0.058 0.370 0.323 0.550 1. When ordering, please specify a packaging code: MA5281-BLD 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 measured at 250 kHz, 0.1 Vrms, 0 Adc. 3. Peak primary current drawn at minimum input voltage. 1 : 0.57 1 : 0.57 1 : 0.52 Ipk3 (A) Output7 2.8 12 V, 1.25 A 4. DCR for the primary and the secondary is measured with windings connected in parallel. 5. Leakage inductance is for the primary, measured with the windings connected in parallel and the secondary windings shorted. 6. Turns ratio is with the primary windings and secondary windings connected in parallel. 7. Output is with the secondary windings connected in parallel. Output of the drive winding is 11 V, 15 mA. Output of the bias winding is 11.5 V, 15 mA. 8. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. Dot indicates pin 1 1 MA5281-BL 0.118 3,00 12 XXXXY 0.028 0,70 0.827 21,0 0.118 3,00 0.810 max 20,57 0.050 1,27 0.130 3,3 1 12 Recommended Land Pattern 0.930 23,62 3 4 12 11 Pri Sec 6 5 9 10 1 8 Bias 2 Drive 7 Primary windings and secondary windings to be connected in parallel on PC board 0.425 max 10,80 0.969 24,6 1.181 max 30,00 0.004 / 0,10 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 1053 Revised 05/01/13 © Coilcraft Inc. 2014 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.