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Flyback Transformer for Texas Instruments TPS23753A PoE Controller

  • Flyback transformer for 10 W PoE applications
  • Developed to work with TI TPS23753A PoE controller
  • Isolation (hipot): 1500 Vrms, one minute from primary and bias to secondary and sync
  • RoHS-compliant. Tin-silver (96.5/3.5) over tin over nickel over phos bronze


Part number1
Click to get parts
at 0 A2
±7 (µH)
at Ipk3
min (µH)
DCR max4
max (µH)
max (pF)
Turns ratio7
Pri : Sec : bias : sync
PA6340-AL_ 133 123.7 0.330 (pri)
0.0135 (sec)
0.230 (bias)
0.190 (sync)
1.50 70 1 : 0.167 : 0.361 : 0.167 5.0 V, 2.0 A
1 When ordering, please specify packaging code: e.g. PA6340-ALD
  Packaging: D = 13" machine-ready reel
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, at 1 kHz, 0.5 Vrms, 0 Adc using an Agilent/HP 4263B impedance analyzer or equivalent.
3 Ipk: Peak primary current (1.1 A) 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 and is measured between pins 1 and 2 with all other
windings shorted.
6 Capacitance is measured from pins 1,2 to pins 6,10 at 250 kHz, 0.5 Vrms.
7 Ambient temperature range: −40°C to +85°C
8 Storage temperature range: Component: −40°C to +125°C
Tape and reel packaging: −40°C to +80°C
9 Isolation (hipot): 15000 Vrms, one minute from primary and bias to secondary and sync.
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.

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Updated: April 16, 2018