Document 714 8 W Forward-Mode Transformers • • • • Designed for forward topology operating at 250 kHz Five outputs from 3.3 V to 15 V; 18 – 36 V input 1500 Vrms isolation from primary and aux to the secondary Specified by National Semiconductor for its LM5015 TwoSwitch Forward Regulator Core material Ferrite Terminations RoHS tin-silver over tin over nickel over phos bronze. Other terminations available at additional cost. Weight 4.0 – 4.3 g Ambient temperature –40°C to +85°C Storage temperature Component: –40°C to +85°C. Packaging: –40°C to +80°C Resistance to soldering heat Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C / 85% relative humidity) Failures in Time (FIT) / Mean Time Between Failures (MTBF) 38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332 Packaging 200 per 13″ reel Plastic tape: 32 mm wide, 0.5 mm thick, 24 mm pocket spacing, 11.2 mm pocket depth PCB washing Only pure water or alcohol recommended Part Inductance2 number1 nom (µH) FCT1-33L2SL_ 324 FCT1-50L2SL_ 324 FCT1-90L2SL_ 324 FCT1-120L2SL_ 324 FCT1-150L2SL_ 324 DCR max (mOhms)3 pri sec aux 65 22.5 460 65 31 490 65 105 490 65 150 535 65 223 470 Leakage inductance4 max (µH) 0.530 0.585 0.570 0.525 0.600 Input voltage range (V) 18 – 36 18 – 36 18 – 36 18 – 36 18 – 36 Turns ratio5 pri : sec pri : aux 1 : 0.5 1 : 1.39 1 : 0.72 1 : 1.39 1 : 1.17 1 : 1.39 1 : 1.56 1 : 1.39 1 : 1.89 1 : 1.39 Output6 3.3 V, 2.4 A 5 V, 1.6 A 9 V, 0.89 A 12 V, 0.67 A 15 V, 0.53 A 1. When ordering, please specify a packaging code: FCT1-50L2SLD Packaging: D = 13″ machine ready reel. EIA-481 embossed plastic tape (200 parts per full reel). B = Less than full reel. In tape, but not machine ready. To have a leader and trailer added ($25 charge), use code letter D instead. 2. Inductance is measured at 250 kHz, 0.3 Vrms, 0 Adc. 3. DCR for the secondary is measured with the windings connected in parallel. 4. Leakage inductance is for the primary and is measured with the secondary shorted. 5. Turns ratio is with the secondary windings connected in parallel. 6. Output is with the secondary windings connected in parallel. Auxiliary winding output is 10 V, 20 mA. 7. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. 1 Recommended Land Pattern 8 7 Primary Secondary 2 3 6 5 0.080 2,03 1 0.460 11,68 0.433 max 11,00 0.600 max 15,24 0.413 10,50 0.024 0,60 5 4 0.50 max 12,7 4 Dimensions are in inches mm 0.098 2,50 Specifications subject to change without notice. Please check our website for latest information. © Coilcraft, Inc. 2009 0.004 /0,10 0.041 1,05 0.050 1,27 Auxiliary Secondary windings to be connected in parallel on PC board. Dot above pin1 1 8 0.098 2,50 Document 714 Revised 02/18/09