Document 1299 SMT Planar Transformer For TI UCC2897 12 V/264 W Active Clamp Forward • Developed for Texas Instruments UCC2897 Active Clamp Forward (PMP7376 reference design) • Designed for 52 – 60 Vdc input; 12 V, 22 A output • High efficiency; excellent DCR; very low leakage inductance; • 1500 Vrms, one minute primary to secondary isolation (hipot) Core material Ferrite Terminations Matte tin over nickel over brass. Weight 22.0 g Ambient temperature –40°C to +125°C Maximum part temperature +155°C (ambient + temp rise) Storage temperature Component: –40°C to +155°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. Primary Leakage DCR max (mOhms) inductance1 inductance2 PartTurns number Pri Sec Aux ±20% (µH) max (µH) Pri Sec Aux NA5738-DL 5 2 2 100 0.18 4.8 1.7 18 NA5738-DL XXXXY 1. Inductance is for the primary, measured on Agilent/HP 4284A at 200 kHz, 0.5 Vrms, 0 Adc. 2. Leakage Inductance is for the primary, measured at 100 kHz, 0.1 Vrms, 0 Adc with secondary pins shorted. 3. Volt-time product is based on primary turns and 3000 gauss. 4. Output of the aux winding is 12 V. 5. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. Volt-time typ3 (V-µsec) 94.5 product Output 12 V, 22 A 1.032 max 26,20 1.110 max 28,20 2 Pri 7 1 0.453 max 11,50 Sec 3 5 0.004 /0,102 Aux 4 0.966 24,54 0.236 typ 6,00 Recommeded Land Pattern 0.087 typ 2,20 ∅ 0.080 (2) 2,03 0.325 typ 8,25 ∅ CL 0.133 (4) 3,38 Dimensions are in [email protected] subject to change without notice. US +1-847-639-6400 Please check [email protected] our website for latest information. UK +44-1236-730595 Taiwan +886-2-2264 3646 [email protected] China +86-21-6218 8074 [email protected] Singapore + 65-6484 8412 [email protected] inches mm Document 1299 Revised 01/15/16 © 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.