Document 268 with For use family C 8 IC3 4x Micrel M Flyback Transformer – U6939-C Schematic This product is not RoHS-compliant. Contact Coilcraft for current status or possible alternatives. This transformer has been specially designed to meet the requirements of Micrel’s MIC38C4x family of BiCMOS current-mode PWM controllers. Free evaluation samples can be requested by contacting the Coilcraft sales office nearest you. Part number U6939-C Inductance1 ±8% (µH) 380 DCR max (Ohms) (1-2) 0.580 (3-4) 0.120 (7-8) 0.011 Isolation (Vrms) (1-7,core) 2500 (1-3) 500 (3,7-core) 500 1. Inductance is for the primary, measured at 100 kHz, 1.0 Vrms, 0 Adc. 2. Operating temperature range -40°C to +85°C. 3. Electrical specifications at 25°C. 1 C Sec 2 3 7 Ter 4 D Recommended Board Layout A E 5 4 F B 8 1 0.047 0,12 A max B max C max D nom E F 0.710 0.930 0.810 0.280 0.492 0.197 inches 18,03 23,62 20,57 7,11 1,25 1,50 mm Specifications subject to change without notice. © Coilcraft, Inc. 2007 8 Pri Document 268 Revised 9/10/01