Coilcraft NA5814-AL, NA5919-AL Flyback Transformer for Microchip Microinverter AN1444
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Flyback Transformers for Microchip
AN1444 Microinverter

  • Developed for the Microchip AN1444 Microinverter
  • Designed to operate at 57 kHz with 20 – 55 Vdc input
  • Rectified sine wave output
  • 3000 Vrms, one minute primary to secondary isolation
  • RoHS-compliant. Tin-silver-copper (95.5/4/0.5) over tin over copper clad steel terminations


Part number
Click to get parts
at 0 A1
±10% (µH)
at Ipk2
min (µH)
DCR max
max (µH)
Turns ratio
pri : sec
pri sec
NA5814-AL 55.0 44.0 0.0475 0.360 1.45 1 : 7 13.6 230
NA5919-AL 55.0 38.5 0.0480 0.110 1.58 1 : 4 13.6 110
1 Inductance is for the primary, measured at 150 kHz, 0.1 Vrms, 0 Adc.
2 Ipk is the current drawn at minimum input voltage
3 DCR for the primary is with the windings connected in parallel. DCR measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
4 Leakage inductance is measured on the primary winding with the secondary pinss shorted.
5 Ambient temperature range: −40°C to +85°C
6 Storage temperature range: Component: −40°C to +85°C
Packaging trays: −40°C to +80°C
7 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