FA2636-AL

Document 594 Flyback Transformer For National Semiconductor LM5001 Switch Mode Regulator The FA2636-AL surface mount flyback transformer was developed specifically for the National Semiconductor LM5001 High Voltage Switch Mode regulator for isolated and non-isolated flyback topologies. It is designed to operate in continuous mode at 250 kHz with an input voltage of 16 – 36 Volts. This industrystandard size EP13 transformer features 1500 Vrms isolation from the primary and auxiliary winding to the secondary. Output of the auxiliary winding is 7.5 V used to power the IC. Coilcraft can also custom design transformers with voltage, inductance and DCR values to meet your specific requirements. For free evaluation samples, contact Coilcraft or order them on-line at www.coilcraft.com. Inductance Part at 0 A2 1 number ±10% (µH) FA2636-AL_ 160 Inductance at Ipk3 min (µH) 144 DCR max (Ohms)4 pri bias sec 0.225 0.340 0.078 2. 3. 4. 5. Leakage inductance max (µH)5 1.60 Turns ratio6 pri : sec pri : aux 8:2 8:3 Ipk3 (A) 1.0 Output 5.0 V, 1.0 A 1. When ordering, please specify packaging code: FA2636-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 Inductance is for the primary, measured at 250 kHz, 0.2 Vrms, 0 Adc. Ipk is peak primary current drawn at minimum input voltage. DCR for the secondary is per winding. Leakage inductance measured between pins 3 and 2 with all other pins shorted. 6. Turns ratio is with the secondary windings connected in parallel. 7. Operating temperature range –40°C to +85°C. 8. Electrical specifications at 25°C. 3 0.500 max 12,70 8 9 Sec 7 6 Pri 2 0.004 /0,10 0.699 max 17,75 0.512 13,00 0.028 0,70 5 4 Aux 5 0.039 1,00 0.061 1,55 0.590 14,99 0.050 1,27 Secondary windings to be connected in parallel on the PC board. 6 0.530 max 13,46 10 1 Recommended Land Pattern 0.098 2,50 1 0.098 2,50 Weight: Terminations: Tape and reel: 6.28 g Tin-silver over tin over nickel over phos bronze 175/13″ reel 32 mm tape width Specifications subject to change without notice. Please check our website for latest information. Document 594 Revised 09/03/08 © Coilcraft, Inc. 2008