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PMP9208: Remaking the design for 12V at the output

Part Number: PMP9208
Other Parts Discussed in Thread: PMP10350

   Good morning!

   I would like to know what the modifications in the schematic of the PMP9208 project would be to obtain 12V at the output, maintaining the same power (which would give approximately 5.4A of current).

   Best regards.

  • Hi Antonio, you can calculate the required parameters using the UCC2863x calculator tool found here www.ti.com/.../getliterature.tsp

    Changing the secondary turns from 6 to 4 and removing R9 should get you pretty close. Changing R8 to a 40k will give you greater accuracy.

    Alternatively www.ti.com/.../PMP10335 is a 12V 75W design that may not need any modification for your application.

    Hope this helps.
    Thanks
    Billy
  • Thanks for the tip! I will review it and apply the necessary changes.

    I saw the PMP10350 project, but I'm having a problem with the transformer (RLTI-1119) due to the importation with Renco being expensive for Brazil and I did not find the transformer specs (turns ratio, wire gauge...) for me to have to manufacture here. This same problem I would have in the project that you indicated (PMP335), because it also uses a Renco transformer (and that does not provide the specifications).