Document 710 Planar Transformer • • • • For National Semiconductor LM5037 PWM Controller Developed for NSC LM5037 Dual-Mode PWM Controller Designed as half bridge in forward topology Auxiliary winding provides 10 V to the chipset Input voltage range: 36 – 78 V Core material Ferrite Terminations RoHS matte tin over nickel over brass. Other terminations available at additional cost. Weight 11.8 g Ambient temperature –40°C to +85°C Storage temperature Component: –40°C to +85°C. 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 200 per 13″reel Plastic tape: 44 mm wide, 0.37 mm thick, 32 mm pocket spacing, 9.35 mm pocket depth PCB washing Only pure water or alcohol recommended Part Output number1 power (W) HA3648-BL_ 50 Output voltage nom (V) 5 Output current (Adc) 10 Primary inductance2 min (µH) 30.0 1. When ordering, please specify a packaging code: HA3648-BLD Packaging: D = 13″ machine ready reel. EIA-481 embossed plastic tape (200 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. Leakage inductance3 max (µH) 0.040 DCR max4 (mOhms) pri: 6.0 sec: 3.2 aux: 160 3 Æ 4 5 HA3648-BL CCI xxxx 0.810 max 3 20,57 Pri/sec Isolation (Vdc) 1500 2. Inductance measured on an Agilent/HP 4284 between pins 3 and 4 at 250 kHz, 0.1 Vrms, 0 Adc. 3. Leakage inductance measured between pins 3 and 4 at 250 kHz, 0.1 Vrms, 0 Adc with pins 6, 8 and 10 shorted. 4. DCR for the secondary is from pin 6 to pin 10. 5. Electrical specifications at 25°C. Dot indicates pin 1 1 Turns ratio pri : sec1 : sec2 : aux 2:1:1:2 0.800 20,32 0.080 2,03 Primary 8 0.190 4,82 1 8 3 4 5 6 0.095 2,41 0.920 max 23,37 Sec1 10 10 10 0.250 6,36 4 8 1 Sec2 Aux 6 Æ Recommended Land Pattern 0.110 2,79 6 5 0.360 max 9,14 0.006 /0,15 Specifications subject to change without notice. Please check our website for latest information. © Coilcraft, Inc. 2009 Document 710 Revised 10/31/08