Document 457 Flyback Transformer For Maxim MAX5941A PoE Interface/PWM Controller • Dual-output continuous-current flyback transformer • Operates with 18 – 72 Volts input • 1500 Vrms, one minute isolation between the primary and the secondary Core material Ferrite Terminations RoHS tin-silver (96.5/3.5) over tin over nickel over phos bronze. Other terminations available at additional cost. Weight 4.9 g Ambient temperature –40°C to +125°C Storage temperature Component: –40°C to +125°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 200 per 13″ reel Plastic tape: 44 mm wide, 0.35 mm thick, 28 mm pocket spacing, 9.6 mm pocket depth PCB washing Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. See Doc787_PCB_Washing.pdf. InductanceInductance DCR max (Ohms) at 0 A2 at Ipk3 Part number1 ±10% (µH) min (µH) N1N2N3N4N5 C1154-BL_ 255.0 229.5 Leakage Turns ratio Ipk3 max (µH) N1 : N2 : N3 : N4 : N5(A) inductance4 0.335 0.0200.0170.2000.745 5.0 1 : 0.1 : 0.075 : 0.125 : 0.4250.25 1. When ordering, please specify packaging code: C1154-BLD Packaging:D =13″ machine ready reel. EIA-481 embossed plastic tape (200 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 indicates pin 1 1 12 1 12 7 0.865 max 21,97 Internal code 12 0.135 3,43 Parts manufactured prior to December 2011 may be marked differently. 0.340 max 8,64 0.590 14,98 0.693 17,60 8 1 N1 Primary XXXX Y 6 0.079 2,01 0.07 1,79 0.028 0,72 0.098 2,5 C1154-BL 0.677 max 17,20 2. Inductance is for the primary, measured at 275 kHz, 1.0 Vrms. 3. Peak primary current drawn at minimum input voltage. 4. Leakage inductance is for the primary winding with the secondary windings shorted. 5. Electrical specifications at 25°C. Refer to Doc 362 “Soldering Surface Mount Components” before soldering. 0.665 16,88 Recommended Land Pattern 0.098 2,5 5 7 N3 Secondary 2.5 V 11 N5 Bias 2 N2 Secondary 3.3 V 6 9 N4 Drive 5V 4 0.004 /0,10 Dimensions are in inches mm Document 457 Revised 4/30/2015