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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. Primary Leakage Volt-time Part Turns inductance1 inductance2 DCR max (mOhms) product typ4 number N1 N 2 Sec Aux ±20 (µH) max (µH) Pri3 Sec Aux (Vµsec) Output5 RA7040-AL 6 6 3 3 50 0.55 10.75 4.25 61.1 100 12 V, 13 A SMT Planar Transformer Document 1257-1 Document 1257-1 Revised 04/02/15 1. Inductance is for the primary, measured on Agilent/HP 4284A at 200 kHz, 0.5 Vrms, 0 Adc with primary windings connected in parallel. 2. Leakage Inductance is for the primary, measured at 200 kHz, 0.5 Vrms, 0 Adc with primary windings connected in parallel and all secondary pins shorted. 3. Primary DCR measured with primary windings connected in parallel 4. Volt-time product is based on primary windings connected in parallel. 5. Output of the secondary, 12 V 13 A, is from pins 11 – 8, Output of the aux winding is 12 V. 6. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. For TI UCC2897 12 V/ 150 W Active Clamp Forward Pri Sec Aux N1 N2 Core material Ferrite Terminations Matte tin over nickel over brass. Weight 12.7 g Ambient temperature –40°C to +125°C Maximum part temperature +165°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 36 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 (PMP9720 reference design)
- Designed for 48 – 60 Vdc input; 12 V, 13 A
- 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 Primary windings to be connected in parallel on the PC board.
+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. RA7040-AL SMT Planar Transformer Document 1257-2 Document 1257-2 Revised 04/02/15 0.920 23,37 0.050 1,27 0.080 2,03 max Dot indicates pin 1I nternal code 0.800 20,32 Recommended Land Pattern 0.125 3,175 0.090 2,285 0.200 5,080 0.110 2,79 0.080 2,03 0.390 9,91 CL 0.820 20,83 max 0.009 0,229 min 0.004 /0,102 0.375 9,53 max RA7040-ALL XXXX Y Dimensions are in inches mm