• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Answers 1 answer
  • Subscribers 62 subscribers
  • Views 159 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPSM84824: Please validate my schematic design.

yuichi shintomi
Intellectual 315 points
Part Number: TPSM84824

Hi Team.

I used TPSM84824 to create the schematic. I have inserted the material, so please check it.
Please comment on Schematic. Thank you.

Sep_23_2020_TPSM84824_3.6V_5A_Design_Shintomi.pdf

Regards,

Yuichi.Shintomi

  • 0
    TI__Mastermind 35115 points

    Hi Yuichi,

    The one comment I have is the AGND pin appears to be connected to the board ground on the main PCB. The AGND pin is connected to PGND through the module so this connection so AGND does not need to be connected to the board ground on the main PCB.

    Besides that the values match WEBENCH so it looks good. The one thing to consider if you have space on the board is to add a placeholder Cff cap in parallel with Rfbt in case you need to optimize the transient response. It can be not populated. If you need to try adding it in, a value I would recommend starting with is something in the range of 47 pF to 68 pF. These values will add a zero in the loop between 339kHz and 234kHz.

    Anthony

  • 0 in reply to Anthony F
    Intellectual 315 points

    Hi Anthony,

    Thank you for your kind reply. I inadvertently connected AGND to GND. I'm glad you checked it out. I inserted the modified schematic.

    I felt that the transient response of WEBENCH was a little big. Thank you for your suggestion. In the plan, the 1st prototype is an experimental board, equipped with 47pF, and I will experiment with the board. Fixed to Schematic.

    I made a mistake in AGND. I was wondering if there were any other mistakes. I would appreciate it if you could check the modified schematic again.

    Sep_24_2020_TPSM84824_3.6V_5A_Design_Shintomi.pdf

    Regards,

    Yuichi

  • 0 in reply to yuichi shintomi
    TI__Mastermind 35115 points

    I've taken another look over and it looks good.

  • 0 in reply to Anthony F
    Intellectual 315 points

    Hi Anthony,

    Thank you for your kind reply. 

    Regards,

    Yuichi