Coilcraft, Inc. MA5281 Flyback Transformer for TI TPS23756 15 W PoE Converter MA5281-BL MA5281-BLD

Flyback transformer for Texas Instruments TPS23756 in a 15 W PoE converter, designed for primary input from 10.8 to 57 V with 1500 Vrms isolation between primary, bias, and secondary windings. The component has a ferrite core, weighs 11.3 g, and operates from -40°C to +125°C ambient temperature. It is packaged in 13-inch reels with embossed plastic tape (175 parts per reel), featuring RoHS-compliant tin-silver over nickel over phosphor bronze terminations. Inductance is 45 µH at 0 A with primary DCR under 0.060 Ω, leakage inductance under 0.323 µH, and a turns ratio of 1:0.57 for primary to secondary and bias, delivering 12 V at 1.25 A from parallel secondary windings. Peak primary current is 2.8 A at minimum input voltage. Moisture sensitivity level is 1, with resistance to three reflows at 260°C for 40 seconds.