Document 721 Flyback Transformers • • • • For STMicroelectronics Flyback transformers developed for STMicroelectronics Operates at 250 kHz Versions for 5 V and 3.3 V output in 30 Watt applications 1500 Vrms isolation primary and bias to secondary windings Core material Ferrite Terminations RoHS tin-silver over tin over nickel over phos bronze. Other terminations available at additional cost. Ambient temperature –40°C to +125°C Storage temperature Component: –40°C to +125°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) Mean Time Between Failures (MTBF) 26,315,789 hours Packaging 175 per 13″ reel Plastic tape: 44 mm wide, 0.4 mm thick, 32 mm pocket spacing, 11.9 mm pocket depth PCB washing Only pure water or alcohol recommended Leakage 4 Turns ratio6 L at 0 A2 L at Ipk3 Ipk3 Part DCR max (mOhms) inductance5 1 number ±10% (µH) min (µH) pri sec drive aux max (µH) pri : secpri : drivepri : aux (A)Output7 GA3278-BL_ HA3692-BL_ 70.0 70.0 63.0 63.0 60.06.0 100 280 82.59.0 110 310 1. When ordering, please specify packaging code: HA3692-BLD Packaging:D =13″ machine ready reel. EIA-481 embossed plastic tape (175 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. 2. Inductance is for the primary, measured at 250 kHz, 0.2 Vrms. 3. Peak primary current drawn at minimum input voltage. Dot indicates pin 1 12 1 6 3 4 0.050 1,27 1 12 11 Pri Recommended Land Pattern 7 1.181 max 30,00 8.66 : 14.33 : 13.25 : 1 0.93.3 V, 9 A 5.80 : 14.14 : 13.22 : 1 0.95.0 V, 6 A 4. DCR for the primary and the secondary is with windings connected in parallel. 5. Leakage inductance is for the primary, measured with the secondary and drive windings shorted. 6. Turns ratio is with the primary and the secondary windings connected in parallel. 7. Output of the secondary is with the windings connected in parallel. Aux winding output is 10 V; drive winding output is 7 V. 8. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. 0.930 23,62 GA3278-BL XXXX Y 0.810 max 20,57 0.130 3,30 0.028 0,711 2.10 1.35 6 5 1 0.118 3,0 0.118 3,0 Parts manufactured prior to December 2011 may be marked differently. Sec 9 10 8 Drive Aux 2 7 The primary and secondary windings are to be connected in parallel on the PC board. 0.430 max 10,92 0.080 2,03 0.827 21,00 0.969 24,60 0.004 /0,10 Dimensions are in inches mm These parts are preproduction products for electrical evaluation only. 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 721 Revised 12/14/11 © Coilcraft Inc. 2012 This product may not be used in medical of high risk applications without prior Coilcraft approval. Specification subject to change without notice. Please check out web site for latest information.