Coilcraft C1453 PoE Transformer for TI PMP717
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Flyback Transformer for
Texas Instruments TPS23750

  • Developed for TI TPS23750 PoE PD controller (PMP717 reference design)
  • Designed for discontinuous mode in isolated, non-synchronous power supplies.
  • 34 – 57 V input; 3.3 V, 1.5 A output; 10 V bias winding output
  • 1500 Vrms primary to secondary isolation; 500 Vrms primary to bias isolation
  • RoHS-compliant. 260°C compatible. Tin-silver (96.5/3.5) over tin over nickel over phos bronze terminations


Part number1
Click to get parts
at 0A2
±10% (µH)
at Ipk3
min (µH)
DCR max4
max (µH)
Turns ratio6 Ipk3
pri : sec pri : bias
C1453-AL_ 50 40 0.185 (pri)
0.015 (sec)
0.385 (bias)
1.10 : 0.166 : 0.55 1.22 3.3 V, 1.5 A
1 When ordering, please specify packaging code: e.g. C1453-ALD
  Packaging: D = 13" machine-ready reel
EIA 481 embossed plastic tape (500 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 250 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.
6 Turns ratio is with the secondary windings connected in parallel.
7 Output of the secondary is with the windings connected in parallel. Bias winding output is 10 V.
8 Ambient temperature range: −40°C to +125°C
9 Storage temperature range: Component: −40°C to +125°C
Tape and reel packaging: −40°C to +80°C
10 Resistance to soldering heat: Three reflows at >217°C for 90 seconds (+260°C ±5°C for 20 – 40 seconds), allowing parts to cool to room temperature between.
11 Electrical specifications at 25°C.
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: April 16, 2018