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| Document 715 4 W Forward Mode Transformers * * * * Designed for forward topology operating at 250 kHz Five outputs from 3.3 V to 15 V; 9 - 18 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 2.0 - 2.1g Ambient temperature -40C to +85C Storage temperature Component: -40C to +85C. Packaging: -40C to +80C Resistance to soldering heat Max three 40 second reflows at +260C, parts cooled to room temperature between cycles Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30C / 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 350 per 13 reel Plastic tape: 32 mm wide, 0.42 mm thick, 20 mm pocket spacing, 9.16 mm pocket depth PCB washing Only pure water or alcohol recommended Part Inductance2 number1 nom (H) FCT1-33K2SL_ 120 FCT1-50K2SL_ 120 FCT1-90K2SL_ 120 FCT1-120K2SL_ 120 FCT1-150K2SL_ 120 DCR max (mOhms)3 pri sec aux 48 53 720 48 88 735 48 218 745 48 420 705 48 532 732 Leakage inductance4 max (H) 0.195 0.205 0.165 0.170 0.215 Input voltage range (V) 9 - 18 9 - 18 9 - 18 9 - 18 9 - 18 Turns ratio5 pri : sec pri : aux 1 : 1.0 1 : 2.8 1 : 1.4 1 : 2.8 1 : 2.3 1 : 2.8 1 : 3.0 1 : 2.8 1 : 3.7 1 : 2.8 Output6 3.3 V, 1.2 A 5 V, 0.8 A 9 V, 0.44 A 12 V, 0.33 A 15 V, 0.27 A 1. When ordering, please specify a packaging code: FCT1-50K2SLD Packaging: D = 13 machine ready reel. EIA-481 embossed plastic tape (350 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, 0.2 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 25C. Refer to Doc 362 "Soldering Surface Mount Components" before soldering. 1 Primary Secondary 2 3 Auxiliary 4 Secondary winding 7 - 6 not used on FCT1-120K2SL and FCT1-150K2SL. For other parts, secondary windings to be connected in parallel on PC board. 6 5 8 7 Dot above pin1 0.355 max 9,02 0.004 /0,10 0.520 max 13,21 0.339 8,60 5 4 0.041 1,05 Recommended Land Pattern 0.080 2,03 1 0.370 9,40 0.098 2,50 0.028 0,70 0.430 max 10,92 0.050 1,27 1 0.098 2,50 8 Dimensions are in inches mm Specifications subject to change without notice. Please check our website for latest information. Document 715 Revised 02/18/09 (c) Coilcraft, Inc. 2009 |
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