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 discontinuous mode with a universal input • 3000 Vrms, one minute isolation Pri and Aux to Sec1 and Sec2. • 500 Vrms, one minute isolation Pri to Aux and between Sec1 and Sec2 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. Tray 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 L at 0 A1 L at Ipk2 number ±10% (µH) min (µH) GA0007-AL 270 243 DCR max (Ohms) Leakage L3 pri sec1 sec2 aux max (µH) 0.25 0.0270.045 0.26 8.16 Turns ratio Ipk2 pri : sec1 : sec2 : aux(A) 5 : 1 : 1 : 13.0 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. 0.150 (4) 3,81 Dot indicates pin 1 1 0.100 (6) 2,54 1 14 14 11 0.500 12,70 0.935 max 23,75 1.170 max 29,72 0.800 20,42 0.044 (14) 1,10 0.150 ±0.01 3,81 ±0,25 Dimensions are in Aux 4 16 V, 0.75 A Sec1 5 Gnd Secondary windings to be connected in series on the PC board. 0.900 max 22,86 0.800 20,42 8 3 10 Recommended Board Layout 0.025 sq 0,635 Sec2 13 7 6 Pri 2 32 V, 1.0 A inches mm 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 605 Revised 01/14/13 © Coilcraft Inc. 2013 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.