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Specifications subject to change without notice. Please check our website for latest information. US UK Taiwan China Singapore +1-847-639-6400 sales@coilcraft.com +44-1236-730595 sales@coilcraft-europe.com +886-2-2264 3646 sales@coilcraft.com.tw +86-21-6218 8074 sales@coilcraft.com.cn + 65-6484 8412 sales@coilcraft.com.sg © 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. SMT Planar Transformer Document 1268 Document 1268 Revised 11/16/15 1. Inductance measured on an Agilent/HP 4284 at 200 kHz, 0.5 Vrms, 0 Adc with windings connected in parallel. 2. Leakage inductance is for the primary with windings connected in parallel, measured at 200 kHz, 0.5 Vrms, 0 Adc with all secondary pins shorted. 3. DCR for primary is measured with the windings connected in parallel. DCR for secondary is measured between pins 7 and 11. 4. Volt-time product is based on primary windings connected in parallel. 5. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. For TI UCC2897 (PMP9656 Reference Design) Primary Leakage Volt-time Turns inductance1 inductance2 DCR max (mOhms)3 product typ4 Part number Pri Sec Aux ±20% (µH) max (µH) Primary Secondary Aux (Vµsec) Output RA6992-BL 8 4 4 50 0.25 6.9 4.2 82 206 12 V, 21 A Pri 8T Sec Aux 4T 1T Primary windings to be connected in parallel on the PC board Core material Ferrite Terminations Matte tin over nickel over brass. Weight 26.5 g Ambient temperature –40°C to +85°C Maximum part temperature +125°C (ambient + temp rise) Storage temperature Component: –40°C to +125°C. Tray 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 25 per tray PCB washing Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. See Doc787_PCB_Washing.pdf.
- Developed for Texas Instruments UCC2897 Active Clamp Forward (PMP9656 reference design)
- Rated for 250 Watts
- Designed to operate at 200 kHz with 48 – 60 Vdc input.
- High efficiency; excellent DCR; very low leakage inductance; 1500 Vrms, one minute primary to secondary isolation.
- Provides 0.009″ (0.229 mm) clearance above the seating plane 1.050 26,67 0.475 12,10 max max 0.009 0,229 min 1.160 29,46 max 0.004 /0,102 Dot indicates pin 1I nternal code 1.00 25,40 Recommended Land Pattern 0.150 3,81 0.0626 1,59 0.313 7,95 0.1878 4,77 0.130 3,30 0.110 2,79 /c198 /c198 0.080 2,03 0.10 2,54 RA6992-BL XXXX Y Dimensions are in inches mm