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TPS55340-Q1: schematic review

Sherry Liang
Genius 10255 points
Part Number: TPS55340-Q1

Dear team,

Could you please help review below schematic? Thanks!

Application condition:

  1. Input voltage range: 6v – 18v
  2. Output voltage: 22v
  3. Maximum output current: 1.4A
  4. Allowable output voltage ripple: 2%Vout
  5. Allowable transient response: 5%Vout

TPS55340 schematic design.pdf

Thanks & Best Regards,

Sherry

  • +1
    TI__Mastermind 22610 points

    Hi Sherry,

    Thank you for using the E2E forum.

    I just took a look at your parameters and the schematic.
    I couldn't find any spec violations and the component selection seems solid as well.
    The only concern I have is that you might reach the current limit of the internal MOSFET when operation at lowest Vin (6V) with max. load (1.4A). The inductor could fall into saturation under these circumstances as well, due to the additional ripple current.

    Aside from this, I see no other issues.
    Is there anything specific about the schematic you would like to have feedback on?

    Please let me know if you have additional questions.
    Best regards,
    Niklas 

  • 0 in reply to Niklas Schwarz
    TI__Mastermind 22610 points

    Hi Sherry,

    I hope you made progress in refining you schematic.
    As there has been no further comments, I will close this thread for now.
    If you have additional questions, please reply below to re-open the thread.
    Otherwise feel free to click the "resolved" button.

    Best regards,
    Niklas