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| Document 544 PoE Transformers For ST Microelectronics STE12PS PSE Power Controller These surface mount flyback transformers were developed specifically for the ST Microelectronics STE12PS 12-Channel PSE Power Control Device. They are designed to work with a 3.3 V input to provide a 12 V output. Isolation is 500 Vdc from each primary winding to the secondary winding. Coilcraft can also design custom 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. Part L at 0 A2 number1 10% (H) DA2420-AL_ 330 DA2421-AL_ 330 L at Ipk3 min (H) 297 297 DCR max (Ohms) 1-5 2-6 12-7 0.756 0.886 5.920 0.803 0.984 14.145 Leakage L max (H)4 6.00 4.83 Turns ratio5 pri : sec 1:2 1:3 Ipk3 (A) 2.0 2.0 Output 12 V, 100 mA 12 V, 100 mA 1. When ordering, please specify a packaging code: DA2420-ALD Packaging: D = 13 machine ready reel. EIA-481 embossed plastic tape (175 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 indicates pin 1 1 12 2. Inductance is for the primary, measured at 100 kHz, 0.1 Vrms, 0 Adc. 3. Ipk is the peak current drawn at minimum input voltage. 4. Leakage inductance measured on the primary windings with all secondary pins shorted. 5. Turns ratio is with the primary windings connected in parallel. 6. Operating temperature range -40C to +125C. 7. Electrical specifications at 25C. 0.028 0,711 0.130 3,30 1 0.930 23,62 0.050 1,27 1 2 Pri 12 Sec 7 0.810 max 20,57 6 DA242X-AL 7 Recommended Land Pattern 0.118 3,0 0.118 3,0 6 5 Primary windings to be connected in parallel on the PC board. 1.181 max 30,00 0.450 max 11,43 0.827 21,00 0.969 24,60 0.004 /0,10 0.080 2,03 Weight: 14.1 - 14.6 g Terminations: Tin-silver over tin over nickel over phos bronze Tape and reel: 175/13 reel, 44 mm tape width For packaging data see Tape and Reel Specifications section. Specifications subject to change without notice. Please check our website for latest information. Document 544 Revised 09/11/06 (c) Coilcraft, Inc. 2008 |
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