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PMP20809: Need transformer specification

Arun M1
Intellectual 665 points
Part Number: PMP20809


Hi,

I was referring to the design and I would like to get the transformer details for the same.(Datasheet and drawing).

Also i would like to know whether the same design can be modified for an output of 29V 1.2A.

Thanks,

Arun M

  • 0
    TI__Intellectual 2770 points

    Hello Arun, attached the transformer info...

    Flyback is working in DCM, so it will work for the 29Vout at same power level around 35W;
    controller sees bias voltage 14V instead of 12V, but it's a 30V rated device.
    Flyback voltage from secondary will be increased by 16V, check max. drain level at 600V FET.
    If you build your own transformer would go for 300uH magnetizing inductance.

    You could use TI Power Stage Designer V4 to analyze the converter, see attachment.

    Best regards, Bernd

    7558.RLTI-1228.pdfFlyback_Arun.pdf