Flyback Transformer EPA3920 ELECTRONICS INC. • Used in Fuel Cell Applications • Used in SMPS 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) 1 Minute 100 KHz, 0.1 Vrms 1 Minute 11 .0023 .0065 .200 1:1.5 1500 500 Pins 1,2,3 to 5,6,7 Pins 1,2,3 to 5,6,7 Pins 14,13,12 to 8,9,10 Pri. with Sec.Shorted Pri. to Sec. Pri. to Sec 1 Pri., Sec 1 to Core Notes : 1. Primary Ipk = 45 Amp 2. Primary Irms = 28 Amp 3. Primary Average = 19 Amp 4. Secondary Ipk = 30 Amp 5. Secondary Irms = 20 Amp 6. Secondary Average = 14.5 Amp 7. Secondary Inductance = 26 µH 8. Vin = 24 Vac (16 Vdc Min./40 Vdc Max.) 9. Frequency = 90 KHz Schematic Sec. 14, 13, 12 Pri. 1, 2, 3 8, 9, 10 5, 6, 7 Package 2.19 Typ. (55.63) PCA EPA3920 D.C Pin 1 I.D. 1.74 Typ. (44.45) Side .150 Min. (3.80) .197 (5.00) .048 (1.22) .394 (10.01) 2.18 (55.37) 1.60 (40.64) Bottom 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. CSA3920 Rev. - 8/21/02 TEL: (818) 892-0761 FAX: (818) 894-5791 http://www.pca.com