Document 628 Flyback Transformer For Texas Instruments UCC1809/2809/3809 Primary Side Controller • Flyback transformer for 50 Watt dc-to-dc fixed frequency current mode switching power supplies • Designed to operate with 22 – 26 V input at 150 kHz • 1500 Vrms, one minute isolation from primary to secondary Core material Ferrite Terminations RoHS tin-silver over tin over nickel over phos bronze. Other terminations available at additional cost. Weight 27.1 g Ambient temperature –40°C to +125°C Storage temperature Component: –40°C to +125°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 24 per tray PCB washing Tested with pure water or alcohol only. For other solvents, see Doc787_PCB_Washing.pdf. Inductance Inductance DCR max (Ohms)3 Part Power at 0 A1 at Ipk2 number (W) ±10% (µH) min (µH) pri sec bias GA3136-BL 53 35.0 31.5 Leakage Turns ratios5 inductance4 Ipk2 max (µH) pri: sec pri : bias (A) 0.029 0.074 0.208 0.230 1 : 1.40 1. 2. 3. 4. Inductance is measured at 150 kHz, 0.1 Vrms. Peak primary current drawn at minimum input voltage. DCR for the primary is with the windings connected in parallel. Leakage inductance is for the primary windings connected in parallel and with the secondary winding shorted. 5. Turns ratios are with the primary windings connected in parallel. 6. Output is for the secondary winding. Output of the bias winding output is 12 V, 20 mA. 7. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. Pri 3 4 7 Sec 0.108 2,75 0.551 max 14,0 1.10 28,0 1 8 Bias 1 1.169 29,7 1.285 max 32,65 0.079 2,0 12 0.043 1,1 1.024 26,0 7 6 Recommended Land Pattern 2 5.9 53 V, 1.0 A Dot indicates pin 1 0.004 / 0,10 mm 6 5 1 : 0.33 Output6 1.053 max 26,75 6 7 0.157 4,0 Primary windings to be connected in parallel on PC board. 1 12 0.657 16,7 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] Document 628 0.157 4,0 inches mm Revised 12/14/11 © 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.