Document 914 Flyback Transformer For ON Semiconductor NCP1236 Fixed Frequency PWM Controller • Flyback transformer for ON Semiconductor NCP1236 Fixed Frequency PWM Controller • Referenced on Akros Silicon Application Note AN006 • Universal input; 66 W output • 3000 Vrms, one minute isolation from primary to secondary windings • Copper shield minimizes EMI radiation Core material Ferrite Terminations RoHS tin-silver over tin over nickel over phos bronze. Other terminations available at additional cost. Weight 60.2 g Ambient temperature –40°C to +85°C Maximum part temperature +125°C. (ambient + temp rise). Derating. Storage temperature Component: –40°C to +85°C. Tray packaging: –40°C to +80°C 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 with pure water or alcohol only. For other solvents, see Doc787_PCB_Washing.pdf Part number KA5038-BL InductanceInductance at 0 A1 at Ipk2 ±10% (µH) min (µH) 560 480 Leakage max (Ohms)3inductance4 pri sec aux max (µH) DCR 0.198 0.007 0.236 5.6 1 : 0.188 : 0.156 2.8 1 KA5038-BL 1.32 max 33,5 11 10 2 3 7 1.65 max 42,0 0.20 5,08 Sec Pri 19 V, 3.5 A 12 6 1 Output6 Dot indicates pin 1 XXXX Y 1. Inductance is measured at 50 kHz, 0.1 Vrms. 2. Peak primary current drawn at minimum input voltage. 3. DCR is with the primary windings connected in series and the secondary windings connected in parallel. 4. Leakage inductance is for both windings of the primary with the secondary windings shorted. 5. Turns ratios are with the primary windings connected in series and the secondary windings connected in parallel. 6. Output is with the secondary windings connected in parallel. Output of the aux winding is 15.5V V, 20 mA. 7. Electrical specifications at 25°C. ratio5 Ipk2 pri : sec : aux (A) Turns 9 8 1 12 Recommended PC Board Layout 4 0.30 7,62 0.915 max 23,24 0.157 4,0 5 Aux 6 Copper shield Primary windings to be connected in series and secondary windings to be connected in parallel on PC board. 6 7 1.20 30,5 0.040 1,016 0.031 0,80 1.20 30,5 Dimensions are in 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] inches mm Document 914 Revised 04/24/12 © 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.