Document 674 Forward Converter Transformer For Akros AS1130 PoE Controller • Developed for Akros Silicon AS1130, 30 W PoE Controller with Integrated DC-DC Conversion • Designed for forward topology operating at 350 kHz • 1500 Vrms 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 10.7 g Ambient temperature –40°C to +125°C Storage temperature Component: –40°C to +125°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 175 per 13″ reel Plastic tape: 44 mm wide, 0.4 mm thick, 32 mm pocket spacing, 11.9 mm pocket depth PCB washing Only pure water or alcohol recommended Part Inductance2 number1 min (µH) GA3291-AL_ 152 Leakage Input inductance4 voltage max (µH) range (V) 0.215 36 – 57 DCR max (Ohms)3 pri sec 0.065 0.031 1. When ordering, please specify a packaging code: Dot indicates pin 1 12 GA3291-AL CCIXXXX 0.028 0,70 0.118 3,00 0.130 3,3 0.118 3,00 Output filter inductor MSS1278-683 1 0.930 23,62 1 7 12 2 Pri Recommended Land Pattern 0.810 max 20,57 Sec 8 3 7 6 Input filter inductor DO1608C-103 2. Inductance is measured at 300 kHz, 0.6 Vrms, 0 Adc. 3. DCR for the primary is measured from pin 1 to pin 3. 4. Leakage inductance is for the primary (pin 1 to pin 3) and is measured with the secondary shorted. 5. Turns ratio is based on the entire the primary winding (pin 1 to pin 3). 6. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. GA3291-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. 1 Turns ratio5 pri : sec Output 1 : 0.923 12 V, 2.5 A 0.069 1,75 Primary is pin 1 to pin 3.Terminal 2 is for internal connection only. Do not connected terminal 2 to ground or any circuitry. 0.827 21,0 0.425 max 10,80 0.969 24,6 1.148 max 29,15 0.004 / 0,10 Dimensions are in inches mm Specifications subject to change without notice. Please check our website for latest information. © Coilcraft, Inc. 2009 Document 674 Revised 10/28/08