25W Flyback Transformer EPC3472G & EPC3472G-LF ELECTRONICS INC. • Designed to work with Linear Tech. LTC4278 • Bobbin : UL94V-0 Recognized Materials • Storage Temperature : -40°C to +125°C • Operating Temperature : 0°C to +70°C • Class 130ºC Insulation System • Duty Cycle : 62% Max. • Switching Frequency : 250kHz • Add “-LF” after part for Lead Free Electrical Parameters @ 25° C Inductance (µH ± 5%) @ 100 KHz, 1.0 Vrms 9.0 Pri. 13.5 Pri. 280 2.6 Aux. Cw-w (pF Typ.) Leakage Inductance (µH Max.) @ 100 KHz, 1.0 Vrms @ 100 KHz, 1.0 Vrms Turns Ratio DCR (mΩ Typ.) 1:0.375 Sec. Pri.:Sec. 1:0.75 Pri.:Aux. Dielectric Rating (Vrms) 87 0.25 1500 Pri. to Aux. and Sec. Pri. w/ Aux. and Sec. shorted Wdg. - Wdg. Wdgs. - Core Package Schematic 1 12 Pri. 9V to 57V 0.830 (21.08) 1 12 2 11 3 Sec. 5V (5A) 4 6 7 0.440 Max. (11.18) Aux. 10V (30mA) 5 8 6 7 0.004 (0.10) 1.128 (28.65) 0.079 (2.01) 0.875 (22.23) 6 0.150 (3.81) 0.028 (0.71) 0.866 (22.0) 0.080 (2.03) 7 PCB Layout (Top View) 0.118 (3.00) 1 Component Outline 1.20 x 0.840 (30.48 x 21.34) 0.118 (3.00) 12 EPC3472G EPC3472G-LF 1. Lead Finish SnPb Hot Tin Dip (Sn) or SnCu 2. Peak Solder Rating 225°C 260°C 13.5 grams 13.5 grams 25 pcs / tube 25 pcs / tube Notes : (for wave solder process Only) 3. Weight 4. Packaging Information (Tube) 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. CSC3472G & -LF Rev.4 12-07-09 JDG TEL: (818) 892-0761 FAX: (818) 894-5791 http://www.pca.com