Document 245 Flyback Transformers These transformers have been specially developed for use in flyback power supplies with the ON Semiconductor NCP1200 PWM Current-Mode Controller. They are designed for universal input, 85 – 265 Vac. For ON Semiconductor NCP1200 Controller Coilcraft can also custom engineer a transformer to meet your specific requirements. For free evaluation samples, contact Coilcraft or visit www.coilcraft.com. Leakage Part Inductance1 DCR inductance2 Isolation3 Turns ratioWeight Application number ±10% (mH) max (Ohms) max (µH) (Vrms) pri : secpri : aux Output(g) 3.5 W Y8844-AL 2.9 4.25 (8-5) 80 1500 1 : 0.08 — 6.5 V, 0.54 A 6.7 0.07 (4-1) 10 W Y8848-AL 1.8 1.77 (10-6) 60 2000 1 : 0.1 — 12 V, 0.83 A 16 0.038 (5-1) 70 W Z9007-BL 0.7 0.261 (12-7) 16 1500 1 : 0.164 — 16 V, 4.2 A 52 0.013 (6-1) 0.013 (4-3) 70 W Z9260-AL 0.7 0.261 (12-7) 26 2000 1 : 0.1641 : 0.15 16 V, 4.2 A(sec) 54 with Auxilary winding 0.013 (6-1) 15 V, 0.2 A (aux) 0.013 (4-3) 0.045 (11-8) 1. Inductance is for the primary, measured at 10 kHz, 0.1 Vrms, 0 Adc 2. Leakage inductance tested at 100 kHz, 0.1 Vrms 3. Isolation tested between primary and secondary on all parts and between primary and auxiliary on Z9260-AL. Y8844-AL 4. Primary to secondary turns ratio specified with secondary windings connected in parallel. 5. Operating temperature range -40°C to +85°C. 6. Electrical specifications at 25°C. Y8848-AL Z9007-BL, Z9260-AL B B A C C For Z9007-BL and Z9260-AL, secondary windings to be connected in parallel on the circuit board. B D 4 D 5 1 8 Packaged 49 per tray 8 Pri 5 1 10 Sec Pri F G 6 Sec 3 10 Z9260-AL 12 5 1 E (7 places) Sec 1 Pri 7 11 H 8 G 1 6 12 4 Bottom view Sec Aux F A 1 Bottom view Y8848-AL 4 7 6 4 Pri 7 1 Packaged 30 per tray E 1 D 6 12 A Bottom view Y8844-AL Z9007-BL 6 5 C 3 1 1 E (9 places) Packaged 25 per tray A max B max C max D min E F G dia H (1 place) Y8844-A 0.72 0.79 0.55 0.1180.1500.6000.030 inches 18,3 20,1 14,0 3,0 3,8115,240,76 mm Y8848-A 1.101.100.950.120.200 0.620 0.044 0.150 inches 27,927,924,13,055,0815,751,12 3,81 mm Z9007-B, Z9260-A1.451.451.170.120.200 0.875 0.044 0.150 inches 36,836,829,73,055,0822,21,12 3,81 mm H F G Terminations: Tin-silver over tin over copper Document 245 Revised 01/31/05