Coilcraft, Inc. D1766-AL PoE Transformer for Linear Technology LTC4267 D1766-AL D1766-ALD

The D1766-AL is a flyback transformer for the Linear Technology LTC4267 PoE PD interface, designed for isolated power supplies with 36-72 V input. It provides three isolated outputs: 3.3 V at 0.5 A, 2.5 V at 1.5 A, and 1.8 V at 2.5 A, with a primary-to-secondary turns ratio of 9.6:1 and 24:1. Primary inductance is 221 μH at 200 kHz and 0 Adc, with leakage inductance no greater than 200 μh. Peak primary current is 1.5 A. DC resistance is 0.420 Ω for pins 1-3 and 0.013 Ω for active secondary windings. The transformer has 1500 Vrms isolation and operates from −40°C to +125°C. It uses a ferrite core and RoHS-compliant tin-silver terminations. Dimensions are 30.00 mm × 11.43 mm × 8.27 mm, with a mass of 12.7 g. Packaging is 175 parts per 13″ reel on 44 mm wide tape.