Document 268 ith For use w family x 4 C 8 3 IC 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 Inductance1 number ±8% (µH) U6939-C 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 8 Sec Pri C 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 0.7100.9300.8100.2800.4920.197 inches 18,0323,6220,57 7,11 1,25 1,50 mm US +1-847-639-6400 sales@coilcraft.com UK +44-1236-730595 sales@coilcraft-europe.com Taiwan +886-2-2264 3646 sales@coilcraft.com.tw China +86-21-6218 8074 sales@coilcraft.com.cn Singapore + 65-6484 8412 sales@coilcraft.com.sg Document 268 Revised 9/10/01 © Coilcraft Inc. 2013 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information.