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PMP9594: Change transformer in ref-design of PMP9594

Son Nguyen Ngoc
Prodigy 160 points

Part Number: PMP9594

Dear Sir,

I want to use "85-265VACin, 5V/1.5A AC/DC USB Charger with Auto-Detect based on PSR Flyback with BJT Switch" ref design for my product. But I don't find any specification or datasheet of transformer T1 G144011LF in ref design. Thus, Could I use the transformer in the attachment instead?

E1738 EFD159019367 EFD15 900UH.pdf

  • 0
    TI__Mastermind 30000 points
    Hello Son Nguyen,

    I tried looking up this part in our Altium database. The part can be found, but there is no additional information on it, and the link that points to the datasheet is broken. So the only thing that I know about G144011LF is that it has a value of 900uH. With that being said, I think that transformer you chose would be fine. It does not have the exact same pinout so keep that in mind.
  • 0 in reply to Adam Mc Gaffin
    Prodigy 160 points

    Hi Adam,

    Thank for your reply.

    I see an issue between G144011LF and your transformer.

    In "85-265VACin, 5V/1.5A AC/DC USB Charger with Auto-Detect based on PSR Flyback with BJT Switch" ref design, turn ratio is at below picture:

    Pri: Sec 13:1

    Pri: Aux 13:3

    But turn ratio in the datasheet of my transformer is : 

    Pri : Aux 14:1

    Pri : Sec 4.6:1

    With that different, Do you think my transformer could use for ref design?