Document 309 Flyback Transformer This surface mount flyback transformer is designed for use with National Semiconductor LM5000 DC/DC regulator. The core completely encloses the windings to minimize EMI interference. The transformer features very low DCR, 500 Vrms isolation and a leakage inductance rating of just For National Semiconductor LM5000 DC/DC Regulator 1.0 µH. Coilcraft can also custom engineer a transformer to meet your specific requirements. For free evaluation samples, contact Coilcraft or order them on-line at www.coilcraft.com. Inductance Leakage ±20% (µH) InputDCR max Inductance3 Turns ratio Isolation4 Part number1 Pins 1 – 4Pins 2 – 3 voltage (V) Output (Ohms) max (µH) in : out : aux(Vrms) A0009-AL_ 100 100 18 – 55 3.3 V @ 3 A 0.150 (1 – 4) 1.0 1 : 0.33 : 1 500 0.150 (2 – 3) 0.012 (5,6 – 7,8) 2 1. When ordering, please specify a packaging code: A0009-ALD Packaging:D =13″ machine ready reel. EIA-481 embossed plastic tape (150 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 measured at 100 kHz, 0.1 Vrms, 0 Adc. 3. Leakage inductance measured at 100 kHz, 0.1 Vrms from pins 1 to 4 with all other pins shorted. 4. Isolation measured from pin 1 to pins 5 and 6; from 2 to 5 and 6; and from pins 1, 2, 5 and 6 to the core for one minute. 5. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. Core material Ferrite Terminations RoHS tin-silver over tin over nickel over phos bronze. Other terminations available at additional cost. Weight 7.86 g Ambient temperature –40°C to +85°C 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 150 per 13″ reel Plastic tape: 44 mm wide, 0.5 mm thick, 28 mm pocket spacing, 13.8 mm pocket depth PCB washing Only pure water or alcohol recommended 4 0.53 max 13,5 Input 1 2 0.87 max 22,0 5 0.75 max 19,0 1 Output 3.3 V @ 3 A Auxiliary 0.76 19,3 4 5 6 3 0.15 3,76 0.20 5,00 7 8 8 Pin 1 indicator Bottom view 0.08 × 0.11 2,00 × 2,79 Recommended Land Pattern Dimensions are in 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 309 Revised 10/28/08 © 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.