Flyback Transformer ELECTRONICS INC. EPC3173G • Used in Flyback Topology Converter • Bobbin : UL94V-0 Recognized Materials • UL 1446 Class B Insulation System • Gapped Transformer Electrical Parameters @ 25° C Inductance (µH ± 10%) Turns Ratio DCR (Ω Typ.) Leakage Inductance (µH Typ.) @ 100 KHz, 0.1 Vrms Dielectric Rating (Vac) @ 100 KHz, 0.1 Vrms 29 .054 .193 .071 .545 .071 2.59:1 .136:1 .41:1 .136:1 .30 1000 Pins 1-2 Pins 1-2 Pins 5-6 Pins 12-11 Pins 10-9 Pins 8-7 Pins 10-9:1-2 Pins 12-11:1-2 Pins 5-6:1-2 Pins 8-7:1-2 Pins 1-2 All other wdg’s shorted Wdg’s to Wdg’s Schematic 12 5V (.04A) 11 1 40-56V 10 95V (.5A) 9 2 5 8 Bias (15V) 5V (.05A) 6 7 Pins 3 & 4 Not Connected Package Pin 1 I.D. 1 .118 .591 (3.00) (15.00) .028 (.700) .854 Max. (21.70) 12 PCA EPC3173G D.C. .835 Max. (21.20) 7 6 .016 (.400) 0°-8° .080 (2.03) .425 Max. (10.80) .010 (.250) 1.128 (28.65) Unless Otherwise Specified Dimensions are in Inches /mm ± .010 /.25 PCA ELECTRONICS, INC. 16799 SCHOENBORN ST. NORTH HILLS, CA 91343 Product performance is limited to specified parameters. Data is subject to change without prior notice. CSC3173G Rev. 3 2/25/04 FT TEL: (818) 892-0761 FAX: (818) 894-5791 http://www.pca.com