Document 409 Flyback Transformer For Maxim MAX5941A PoE Interface/PWM Controller • Designed for IEEE 802.3af-compliant PoE applications • Operates with 32 – 56 Volts input • 1500 Vrms isolation between the primary and the secondary Core material Ferrite Terminations RoHS tin-silver over tin over nickel over phos bronze. Other terminations available at additional cost. Weight 5.7 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 200 per 13″ reel Plastic tape: 44 mm wide, 0.37 mm thick, 28 mm pocket spacing, 9.0 mm pocket depth PCB washing Only pure water or alcohol recommended Part number1 C1099-AL Inductance at 0 A2 ±5% (µH) 133.0 Inductance at Ipk3 min (µH) 126.0 1. When ordering, please specify packaging code: C1099-ALD Packaging: D = 13″ machine ready reel. EIA-481 embossed plastic tape (200 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 is for the primary, measured at 300 kHz, 1.0 Vrms. 3. Peak primary current drawn at minimum input voltage. 0.135 3,43 Dot indicates pin 1 12 1 0.677 max 17,20 1 0.665 16,88 0.865 max 21,97 12 0.07 1,79 ½ Primary Secondary 6 5 12 0.098 2,5 0.028 0,72 8 7 1 0.098 2,5 7 Ipk3 (A) Output7 0.9 3.3 V, 2.5 A 4. Primary DCR is measured with the windings connected in series. Secondary DCR is measured with the windings connected in parallel. 5. Leakage inductance is for the primary winding with the secondary winding shorted. 6. Turns ratio is for the primary connected in series and the secondary connected in parallel. 7. Output of the secondary is with the windings connected in parallel. Bias winding output is 14 V. 8. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. C1099-A 6 Leakage Turns ratio6 inductance5 max (µH) pri : sec pri : bias 3.5 1 : 0.13 1 : 0.57 DCR max (Ohms)4 pri sec bias 0.283 0.013 0.480 11 Recommended Land Pattern ½ Primary 2 10 0.335 max 8,51 0.079 2,01 0.590 14,98 0.693 17.60 Bias 0.004 /0,10 3 Primary windings to be connected in series and secondary windings to be connected in parallel on the PC board. Specifications subject to change without notice. Please check our website for latest information. © Coilcraft, Inc. 2009 Document 409 Revised 10/28/08