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Dual Output Flyback Transformer
for PoE

  • Developed for Maxim MAX5941A PoE Interface/PWM Controller
  • 18 – 72 V input
  • Secondary windings for 3.3 V and 2.5 V output
  • 14 V bias winding output; 5 V drive winding output
  • 1500 Vrms, one minute primary/bias to secondary/drive isolation
  • RoHS-compliant. 260°C compatible. Tin-silver (96.5/3.5) over tin over nickel over phos bronze terminations

SPECIFICATIONS


Part number1
Click for samples
L at 0A2
±10% (µH)
L at Ipk3
min (µH)
DCR max4
(Ohms)
Leakage
inductance5
max (µH)
Turns ratio Ipk2
(A)
Output
C1154-BL_ 255.0 229.5 0.335 (N1)
0.020 (N2)
0.017 (N3)
0.200 (N4)
0.745 (N5)
5.0 1 : 0.10 (N1 : N2)
1 : 0.075 (N1 : N3)
1 : 0.125 (N1 : N4)
1 : 0.425 (N1 : N5)
0.25 3.3 V (N2)
2.5 V (N3)
1 When ordering, please specify packaging code: e.g. 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.
2 Inductance is for the primary, measured at 275 kHz, 1.0 Vrms
3 Ipk: Peak primary current drawn at minimum input voltage.
4 DCR measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
5 Leakage inductance is for the primary winding with the secondary windings shorted.
Refer to Soldering Coilcraft Components before soldering.
PCB washing: Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info
 

 
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Updated: October 30, 2017