Boundary Mode Flyback Transformer for 100V Isolated SMD Power Inductor Flyback Controller of Linear CDH25D09 Tech LT3748 Solution Description • CEFD2513B Series Transformer. • Standard EFD core construction. • L×W×H: 32.6×27.0×15.0mm Max. • Suited for a wide variety of industrial, automotive, medical, telecom, datacom applications, where regulated isolated outputs are required. RoHS Dimensions – mm [inch] Recommended Pad Layout - mm [inch] Electrical Characteristics Vin (Pri.) 10393-T029 Turns Ratio (np/ns) Electrical Parameters Part Number (1-4) 5~100V Vout (Sec) (10,11,127,8,9) 12V, 3.5A Vout (Aux) Pri:Aux (5-6) (1-4):(5-6) 12V, 0.025A 7.0:1.0 Inductance (uH) Pri:Sec (1-4): (10,11,12-7,8,9) 7.0:1.0 Leakage Inductance Max. (uH) DCR (mΩ Max.) Pri. Pri. Pri. Sec. (1-4) 400 (1-4), (Tie 5+6+7+8+9+10+11+ 12), (Tie 2+3) 6.5 (1-4) 300 (10,11,12-7,8,9) 15 Aux. ※1. Operating and storage temperature unless otherwise noted: -40°C to +85°C ※2. Primary to secondary isolation rating is 2500Vrms unless otherwise noted. ※3. Maximum switching frequency at full load: 155kHz, Minimum switching frequency at full load: 55kHz Page 1 of 2 Revised: 3-Oct-12 Boundary Mode Flyback Transformer for 100V Isolated SMD Power Inductor Flyback Controller of Linear CDH25D09 Tech LT3748 Solution Schematics ※1. Dots indicate polarity. ※2. (1-3) and (2-4) will be connected in series; (12-7), (11-8), (10-9) will be connected in parallel. I.C. References Linear Technology Solution Sumida Part No. DC1745A Demo Board Powering LT3748 10393-T029 ※1. Please contact your regional sales office for additional information/details. Please refer to the sales offices on our website - http://www.sumida.com Hong Kong Shanghai Shenzhen Taipei Tel.+852-2880-6688 FAX.+852-2565-9600 [email protected] Tel.+86-021-5836-3299 FAX.+86-021-5836-3266 [email protected] Tel.+86-755-8291-0228 FAX.+86-755-8291-0338 [email protected] Tel.+886-2-8751-2737 FAX.+886-2-8751-2738 [email protected] Tokyo Seoul Singapore San Jose Tel.+81-3-5202-7112 FAX.+81-3-5202-7105 [email protected] Tel.+82-2-6237-0777 FAX.+82-2-6237-0778 [email protected] Tel.+65-6296-3388 FAX.+65-6296-3390 [email protected] Tel.+1-408-321-9660 FAX.+1-408-321-9308 [email protected] Chicago Obernzell Neumarkt Tel.+1-847-545-6700 FAX. +1-847-545-6720 [email protected] Tel.+49-8591-937-0 FAX. +49-8591-937-103 [email protected] Tel.+49-9181-4509-110 FAX. +49-9181-4509-310 [email protected] Page 2 of 2 Revised: 3-Oct-12