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Document 655
Flyback Transformer ForNationalSemiconductorLM5015 Two-Switch DC-DC Regulator
• Referenced on NSC application notes AN‑1724 and AN-1725 • Designed to operate at 250 kHz in continuous conduction
mode with 36 – 72 Volts input • 1500 Vrms, one minute isolation from the primary and auxiliary
to the secondary
Core material Ferrite Terminations RoHS tin-silver over tin over nickel over phos bronze. Other terminations available at additional cost. Weight 6.0 g Ambient temperature –40°C to +85°C Storage temperature Component: –40°C to +85°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 1.