Document 1227-1 Push-Pull Transformers For Linear LT3999 Push-Pull DC/DC Driver • Developed for Linear LT3999 Low Noise, 1 A, 1 MHz Push-Pull DC/DC Driver with Duty Cycle Control • 500 Vrms, one minute isolation primary windings to secondary windings Core material Ferrite Terminations RoHS tin-silver (96.5/3.5) over tin over nickel over phos bronze. Weight PA6381-AL, PA6383-AL: 1.9 – 2.1 g; PA6384-AL: 3.8 – 4.0 g Ambient temperature –40°C to +85°C Maximum part temperature +125°C (ambient + temp rise) Storage temperature Component: –40°C to +125°C. Tape and reel 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 See dimensional drawings PCB washing Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. See Doc787_PCB_Washing.pdf. Part Input number1 voltage (V) PA6381-AL_ PA6383-AL_ PA6384-AL_ 5.0 5.0 12 PrimaryLeakage (µH)2 inductance3 DCR max (Ohms)4 min max max (µH) pri sec inductance 139 29.7 82.5 232 49.5 137.5 0.52 0.19 0.336 0.166 (A); 0.201 (B) 0.035 (A); 0.045 (B) 0.048 (A); 0.061 (B) 1.78 0.067 0.072 Turns ratio5 pri : sec Output 1 : 3.46 12 V, 0.83 A 1 : 1.5 5 V, 1.0 A 1 : 1.4 12 V, 0.83 A 1. When ordering, specify a packaging code: PA6384-ALD Packaging:D =13″ machine ready reel. EIA-481 embossed plastic tape. 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 for Pri A measured on an Agilent/HP 4284 at 100 kHz, 0.1 Vrms, 0 Adc. 3. Leakage inductance measured between pins 1 and 4 at 100 kHz, 0.1 Vrms, 0 Adc with pins 2 and 3 connected and with secondary pins shorted. 4. DCR for the scondary is for each winding. 5. Turns ratio is with the primary windings and secondary windings connected in series. 6. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. US +1-847-639-6400 [email protected] UK +44-1236-730595 [email protected] Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] Document 1227-1 Revised 03/17/15 © Coilcraft Inc. 2016 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information. Document 1227-2 Push-Pull Transformers for Linear LT3999 PA6381-AL, PA6383-AL Dot above pin1 0.355 max 9,02 0.004 /0,10 0.041 1,05 0.520 max 13,21 0.339 8,60 0.028 0,70 0.080 2,03 5 4 0.050 1,27 0.370 9,40 1 0.430 max 10,92 0.098 2,50 1 0.098 2,50 8 Recommended Land Pattern PA6384-AL Dot above pin1 0.433 max 11,00 0.004 /0,10 0.041 1,05 0.600 max 15,24 0.413 10,50 0.024 0,60 4 5 1 8 0.080 2,03 0.460 11,68 0.050 1,27 1 0.500 max 12,7 0.098 2,50 Dimensions are in Recommended Land Pattern 0.098 2,50 inches mm Packaging PA6381-AL, PA6383-AL 350 per 13″ reel Plastic tape: 32 mm wide, 0.42 mm thick, 20 mm pocket spacing, 9.16 mm pocket depth PA6384-AL 200 per 13″ reel Plastic tape: 32 mm wide, 0.5 mm thick, 24 mm pocket spacing, 11.2 mm pocket depth US +1-847-639-6400 [email protected] UK +44-1236-730595 [email protected] Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] Document 1227-2 Revised 03/17/15 © Coilcraft Inc. 2016 This product may not be used in medical or high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check web site for latest information.