Q3903-AL Overview
Document 616 Toroidal Transformer Q3903-AL Specified by ON Semiconductor for use with their NCP1605 PFC Controller.Referenced as X25, pulse transformer on evaluation board NCP1605FORWGEVB and Application Note AND8292. Remended byTexas Instruments for use with their UC3875 Phase Shift Resonant Controller. 1 windings 500 Vrms, one minute winding-to-winding isolation.