Power over Ethernet (PoE/PD) Flyback Transformer ELECTRONICS INC. EPC3248G-X & EPC3248G-X-LF • Used in SMPS DC/DC Converter as a Flyback Transformer in PoE/Powered Devices (PD) • Switching Frequency : 300 KHz to 400 KHz • Add “-LF” after part number for Lead Free • Input Voltage : 36-57 VDC • 40 % Duty Cycle Typ. @ 48 VDC Input Voltage • UL 94V-0 Recognized Materials • UL 1446 Class B Insulation System • Storage Temperature : -40°C to +125°C • Operating Temperature : -40°C to +85°C Electrical Specifications @ 25°C Part Number Chipset EPC3248G-1 EPC3248G-2 EPC3248G-3 EPC3248G-4 EPC3248G-5 EPC3248G-6 EPC3248G-7 EPC3248G-8 EPC3248G-9 EPC3248G-10 EPC3248G-11 EPC3248G-12 EPC3248G-13 EPC3248G-14 EPC3248G-15 DPA425 DPA425 DPA425 DPA423 DPA423 DPA423 DPA424 DPA424 DPA424 DPA424/5 DPA424/5 DPA424/5 DPA426 DPA426 DPA426 PoE Class PD Class Voltage Current Primary OCL Le Power Usage (Vdc) (Amp.) (µH ± 10%) (µH Max.) (Watts) @ 300 KHz, @ 300 KHz, Fb Fb 0.1 Vrms 0.1 Vrms Min. Max. V Out Bias V Out Bias 0 0.44 12.95 Default 3.3 13.2 3.92 0.05 120 2.5 0 0.44 12.95 Default 5.0 13.33 2.59 0.05 120 2.5 0 0.44 12.95 Default 12.0 12.0 1.08 0.05 120 2.5 1 0.44 3.84 Optional 3.3 13.2 1.16 0.05 200 2.5 1 0.44 3.84 Optional 5.0 13.33 0.77 0.05 200 2.5 1 0.44 3.84 Optional 12.0 12.0 0.32 0.05 200 2.5 2 3.84 6.49 Optional 3.3 13.2 1.97 0.05 120 3.5 2 3.84 6.49 Optional 5.0 13.0 1.30 0.05 120 3.5 2 3.84 6.49 Optional 12.0 12.0 0.54 0.05 120 3.5 3 6.49 12.95 Optional 3.3 13.2 3.92 0.05 120 2.5 3 6.49 12.95 Optional 5.0 13.2 2.59 0.05 120 2.5 3 6.49 12.95 Optional 12.0 12.0 1.08 0.05 120 2.5 4(PoE+) Reserved 3.3 13.2 12.12 0.05 25 4.0 Reserved 4(PoE+) Reserved 5.0 13.2 8.0 0.05 25 4.0 Reserved 4(PoE+) Reserved 12.0 12.0 3.33 0.05 25 4.0 Reserved • Isolation : Pri., Bias to Sec. ; 1500 Vrms • Isolation : Pri. to Bias ; 500 Vrms • EPC3248-X EPC3248-X-LF 1. Lead Finish SnPb Hot Dipped Sn or SnCu 2. Peak Solder Rating 225°C 260°C 1 (Unlimited, ≤30°C/60%RH) 1 (Unlimited, ≤30°C/60%RH) Notes : 3. Moisture Sensitive Levels (MSL) Schematic 1 Schematic 2 1 10 V In (Pins 1-3) 9 3 Fb/Bias 1 8 2 7 V In (Pins 1-3) 2 3 6 6 4 5 12 11 10 V Out 9 Fb/Bias 4 1 1 1 2 2 2 1 1 1 1 1 1 3 3 3 3 V Out V Out 7 ER14.5 ER14.5 ER14.5 ER9.5 ER9.5 ER9.5 ER11 ER11 ER11 ER14.5 ER14.5 ER14.5 EFD20 EFD20 EFD20 Schematic 3 1 V In (Pins 1-3) 2 Package Schematic Type 5 Fb/Bias 5 6 8 7 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. CSC3248G-X & -LFa Rev. 5 8-15-11 FT TEL: (818) 892-0761 FAX: (818) 894-5791 http://www.pca.com Power Over Ethernet (PoE/PD) Flyback Transformer ELECTRONICS INC. EPC3248G-X & EPC3248G-X-LF Package ER9.5 0.417 Max. (10.60) 8 Package ER11 0.457 Max. (11.60) 0.063 (1.60) 0.079 (2.00) 5 0.319 (8.10) PCA EPC3248G-X D.C. 1 10 0.495 Solder Pad (12.57) Layout 0.236 (6.00) 0.063 (1.60) 0.006 (0.150) 0.235 Max. (6.00) 1 0.010 (0.254) 0.520 Solder Pad (13.20) Layout 5 0.063 (1.60) 0.008 (0.200) 0.244 Max. (6.20) 0.029 (0.725) 0.455 (11.55) Packaging Information 0.362 (9.20) 0.315 (8.00) 0°-8° 0.079 (2.00) 0.028 (0.700) 6 PCA EPC3248G-X D.C. 4 0.028 (0.700) 0.024 (0.600) 0.480 (12.20) Packaging Information T/R: 600 pcs/13” reel Package EFD20 (Reserved for Class 4 PoE+) 0.067 (1.70) 0.098 (2.50) 0.854 Max. (21.70) 6 10 1 PCA EPC3248G-X Date Code 1 0.670 Solder Pad (17.02) Layout 0.028 (0.700) 0.028 (0.700) 12 0.118 0.591 (3.00) (15.00) 0.835 Max. (21.20) 5 0.394 (10.00) 0.295 (7.50) Tube: 44 pcs/tube T/R: 400 pcs/13” reel Package ER14.5 0.610 (15.50) 0.010 (0.254) 0°-8° 0.079 (2.00) Tube: 52 pcs/tube 0.063 (1.60) 0.079 (2.00) 6 0.067 (1.70) 0.014 Max. (0.350) Marking : PCA EPC3248G-X D.C. 0°-8° 0.012 (0.305) 0°-8° 0.016 0.425 Max. (0.400) (10.80) 0.080 (2.03) 0.028 (0.700) 0.630 (16.00) 0.098 (2.50) 7 0.010 (0.250) 1.055 (26.80) 0.138 (3.50) Packaging Information 0.118 (3.00) Tube: 36 pcs/tube T/R: 350 pcs/13” reel Solder Pad Layout 1.095 (27.82) Packaging Information Tray: 40 pcs/tray 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. CSC3248G-X & -LFb Rev. 5 8/15/11 FT TEL: (818) 892-0761 FAX: (818) 894-5791 http://www.pca.com