Document 1001 Flyback Transformer For Linear Technology LTC3300-1 Cell Balancer • Flyback transformer developed for Linear Technology LTC3300‑1 Bidirectional Cell Balancer • 1500 Vrms primary to secondary isolation; 500 Vrms isolation between windings of the primary and the secondary Core material Ferrite Terminations RoHS tin-silver (96.5/3.5) over tin over nickel over phos bronze. Other terminations available at additional cost. Weight 6.0 g Ambient temperature –40°C to +85°C with Irms current Maximum part temperature +125°C (ambient + temp rise) Storage temperature Component: –40°C to +85°C. Tape and reel 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 175 per 13″ reel Plastic tape: 32 mm wide, 0.5 mm thick, 28 mm pocket spacing, 12.93 mm pocket depth PCB washing Tested with pure water or alcohol only. For other solvents, see Doc787_PCB_Washing.pdf InductanceInductance Leakage 2 3 Ipk3 DCR max (Ohms)4inductance Turns ratio6 Part Irms7 at 0 A at Ipk number1 ±15% (µH) min (µH) pri sec max (µH)5pri : sec(A) (A) MA5421-AL_ 3.4 2.8 0.009 0.011 0.15 1 : 1 10 3.3 1. When ordering, please specify packaging code: MA5421-ALD Packaging:D=13″ machine-ready reel. EIA-481 embossed plastic tape (175 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. Dot above pin1 2. Inductance is for the primary, measured at 100 kHz, 0.1 Vrms, 0 Adc. 3.Ipk is peak primary current drawn at minimum input voltage. 4. DCR is for the windings connected in parallel. 5. Leakage inductance is for the primary windings connected in parallel and is measured with the secondary windings shorted. 6. Turns ratio is with the primary windings and the secondary windings connected in parallel. 7. Current that causes a 40°C rise from 25°C ambient, tested with continuous current flowing through all windings. This information is for reference only and does not represent absolute maximum ratings. 8. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. 0.500 max 12,70 0.004 /0,10 0.039 1,00 0.699 max 17,75 0.512 13,00 1 0.028 0,70 10 0.590 14,99 5 6 inches mm 0.050 1,27 Recommended Land Pattern 0.197 5,0 0.530 max 13,46 Dimensions are in 0.080 2,03 1 0.098 2,50 0.098 2,50 1 2 6 7 Pri Sec 9 10 4 5 Primary windings and secondary windings to be connected in parallel on the PC board Document 1001 Revised 10/13/15