Document 864 Flyback Transformers • Designed for input range of 10 – 14 V. • 1500 Vrms isolation from primary and bias to secondary; 500 Vrms isolation from primary to bias, tested for one minute • The bias winding provides power to the chipset Core material Ferrite Terminations RoHS tin-silver over tin over nickel over phos bronze. Other terminations available at additional cost. Weight 3.9 to 4.1 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 250 per 13″ reel Plastic tape: 32 mm wide, 0.5 mm thick, 20 mm pocket spacing, 11.2 mm pocket depth PCB washing Only pure water or alcohol recommended Inductance Part at 0 A2 1 number ±10% (µH) GA3430-BL_ 25.0 GA3431-BL_ 25.0 Inductance at Ipk3 min (µH) 22.5 22.5 DCR max (mOhms)4 pri sec bias 90 15 95 90 5.0 70 Leakage inductance Turns ratio6 max (µH)5 pri : sec : bias 0.685 5:1:1 0.945 7:1:1 1. When ordering, please specify packaging code: 0.450 max 11,43 0.004 /0,10 0.041 1,05 0.600 max 15,24 0.413 10,50 4 2 0.024 0,60 8 1 0.080 2,03 0.460 11,68 0.050 1,27 0.50 max 12,7 1 4 Pri Output7 5.0 V, 1.0 A 3.3 V, 1.5 A Dot above pin1 GA3431-BLD Packaging: D = 13″ machine-ready reel. EIA-481 embossed plastic tape (250 parts per full reel). B = Less than full reel. In tape, but not machine ready. To have a leader and trailer added ($25 charge), use code letter D instead. 2. Inductance is for the primary, measured at 250 kHz, 0.3 Vrms, 0 Adc. 3. Ipk is peak primary current drawn at minimum input voltage. 4. DCR for the secondary is per winding. 5. Leakage inductance measured between pins 3 and 4 with all secondary pins shorted. 6. Turns ratio is with the secondary windings connected in parallel. 7. Output is with the secondary windings connected in parallel. Bias winding output: 5.0 V, 20 mA (GA3430); 3.3 V, 20 mA (GA3431). 8. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. 3 Input voltage (V) 10 – 14 10 – 14 Ipk3 (A) 2.1 2.1 5 6 5 0.098 2,50 Recommended 0.098 2,50 Land Pattern Sec 7 8 Dimensions are in inches mm Bias 1 Secondary windings to be connected in parallel on PC board Specifications subject to change without notice. Please check our website for latest information. © Coilcraft, Inc. 2010 Document 864 Revised 05/04/10