Document 605 Flyback Transformer For ON Semiconductor NCP1351 Controller • Dual-output flyback transformer for ON Semiconductor’s NCP1351 Variable Off Time PWM Controller. • 32 V, 1.0 A and 16 V, 0.75 A Outputs. Output of the auxiliary winding is 16 V. • Operates in a discontinuousmode with a universal input • 3000 Vrms primary to secondary isolation. Core material Ferrite Terminations RoHS tin-silver over tin over phos bronze. Other terminations available at additional cost. Weight 23.5 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 64 parts per tray PCB washing Only pure water or alcohol recommended Part number GA0007-AL L at Ipk2 min (µH) 243 L at 0 A1 ±10% (µH) 270 pri 0.25 DCR max (Ohms) sec1 sec2 aux 0.027 0.045 0.26 Leakage L3 max (µH) 8.16 Turns ratio pri : sec1 : sec2 : aux 5:1:1:1 Ipk2 (A) 3.0 1. Inductance is for the primary, measured at 45 kHz, 0.8 Vrms, 0 Adc. 2. Ipk is the peak current drawn at minimum input voltage. 3. Leakage inductance measured on the primary winding with all secondary pins shorted. 4. Ambient operating temperature range –40°C to +85°C. 5. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. Dot indicates pin 1 1 14 0.150 (4) 3,81 0.100 (6) 2,54 1 14 11 0.500 12,70 0.935 max 23,75 Pri 2 32 V, 1.0 A Sec2 13 3 16 V, 0.75 A 4 7 6 1.170 max 29,72 0.800 20,42 0.044 (14) 1,10 Recommended Board Layout 0.900 max 22,86 0.023 sq 0,584 0.800 20,42 Aux Sec1 5 Gnd 10 Secondary windings to be connected in series on the PC board. 0.150 ±0.01 3,81 ±0,25 Specifications subject to change without notice. Please check our website for latest information. © Coilcraft, Inc. 2009 8 Document 605 Revised 04/26/07