Coilcraft NA5730-AL Flyback Transformer for TI TPS23751 and TPS23752 PoE Interface
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SMT Flyback Transformer for
TI TPS23751/2 PD Controllers

  • Developed for Texas Instruments TPS23751 and TPS23752.
  • Input voltage: 33 – 57 V
  • 1500 Vrms, one minute isolation, primary and bias to secondary and drive
  • RoHS-compliant  260°C compatible. Tin-silver-copper over tin over nickel over phos bronze terminations


Part number1
Click to get parts
L at 0A2
L at Ipk3
DCR max4
L max (µH)5
Turns ratio6 Ipk3
pri : sec pri : bias pri : drive
NA5730-AL_ 62.0 55.8 0.107 (pri)
0.004 (sec)
0.122 (bias)
0.060 (drive)
2.0 1 : 0.125 1 : 0.29 1 : 0.125 2.1 5 V, 4.5 A
1 When ordering, please specify packaging code: e.g. NA5730LD
Packaging: D = 13" reel, machine-ready 
EIA-481 embossed plastic tape (175 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, 0.1 Vrms, 0 Adc
3 Ipk: Peak primary current drawn at minimum input voltage.
4 DCR for the primary and the secondary is with windings connected in parallel. DCR measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
5 Leakage inductance is for the primary, measured with the windings connected in parallel and with the secondary windings shorted.
6 Turns ratio is with the primary windings and the secondary windings connected in parallel.
7 Output of the secondary is with the windings connected in parallel. Bias winding output is 12 V, 20 mA. Drive winding output is 5 V, 10 mA.
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 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.
Your comments and suggestions are welcome. Contact [email protected]
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Updated: April 16, 2018