Flyback Transformer EPC3145 ELECTRONICS INC. • Used in SPMS Flyback Topolgy • Gapped Transformer • Low Core Loss Material • UL 94V-0 Recognized Components • UL 1446 Class B Insulation System • Works up to 200 KHz Switching Frequency Primary Specification Inductance (µH ± 10%) DCR (Ω Typ.) Turns Ratio Leakage Inductance (µH Typ.) 10 KHz, 0.1 Vrms Isolation (Vrms) 100 KHz 0.1 Vrms 302 1.17 .030 Pins 1-2 Pins 1-2 Pins 8-7 .008 Pins 6-5 .122 Pins 3-4 1 Minute 1 Minute 18 7.916 19.0 13.57 1500 500 Pins 1-2 with 3,4,5,6,7,8 Shorted Pins 1-2 to Pins 8-7 Pins 1-2 to Pins 6-5 Pins 1-2 to Pins 3-4 Pri. to Sec 1 Sec. 2, Sec 3 Pri., Sec 1, Sec 3 Sec. 2 to Core Schematic Copper Shield Notes : 1. Pri Ipk = 1.4 Amp 2. Pri Irms = 0.58 Amp 1 Pri. 2 8 Sec. =1 Irms = 3.29 Amp (12 V) 7 3 Sec =3 Irms = 0.3 Amp (7 V) 4 6 Sec. =2 Irms = 6.11 Amp (5 V) 5 Package .787 Max. (20.00) White Dot Pin # 1 PCA EPC3145 D.C .689 Max. (17.50) Side .150 Min. (3.80) .150 (3.80) .026 (.650) 1 4 .669 Max. (17.00) .514 (13.05) 8 Bottom 5 .118 Max. (3.00) .201 (5.10) 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. CSC3145 Rev. - 5/14/03 TEL: (818) 892-0761 FAX: (818) 894-5791 http://www.pca.com