• State Resolved
  • Locked Locked
  • Replies 8 replies
  • Answers 1 answer
  • Subscribers 64 subscribers
  • Views 337 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.

TPS65094: schematic check

GARETH OU
Mastermind 9995 points
Part Number: TPS65094
Other Parts Discussed in Thread: CSD87331Q3D, CSD87381P, CSD87588N

Hi 

Could you help check the TPS65094 schematic and any need to adjest ?

Thank you

apollo lake pmic.pdf

  • 0
    TI__Mastermind 19776 points

    Hi Gareth,

    Thanks for reaching out! We have available a schematic/layout checklist to help our customers review their designs. Could you please fill out the checklist and attach it to this E2E? Here is the link to the checklist which can also be found in the product folder: TPS65094x Schematic Checklist, Layout Checklist, and ILIM Calculator tool (Rev. A). Please let me know if you are not able to access the file.

    Once the checklist is complete, I can also help with a second schematic review. 

    Thanks,

    Brenda

  • 0 in reply to Brenda Diaz
    Mastermind 9995 points

    Hi Brenda

    checklist complete,

    could you help with the second schematic review

    Thanks you

    SLVA735_TPS65094x Schematic Checklist, Layout Checklist, and ILIM Calculator 的複本.xlsx

  • 0 in reply to GARETH OU
    TI__Mastermind 19776 points

    Hi Gareth,

    Thanks for filling out the schematic checklist. My bandwidth is currently very limited but I can provide the schematic feedback by next Tuesday (March-15-22). 

    Thanks,

    Brenda

  • 0 in reply to Brenda Diaz
    TI__Mastermind 19776 points

    Hi Gareth,

    Just wanted to provide an update here. I have had to support some unexpected activities this week and it will take a day or two before I can provide my feedback on this schematic. 

    Thanks,

    Brenda

  • 0 in reply to Brenda Diaz
    Mastermind 9995 points

    Hi Brenda

    Thanks for your reply

    This case is urgent Hope to help soon

  • 0 in reply to GARETH OU
    TI__Mastermind 19776 points

    Hi Gareth,

    I took a look at your schematic and it seems like the design checklist we provided wasn't fill out correctly. Only column G "Check if Complete" must be filled by our customers. The other columns are our recommended connections when specific device pins are used and when they are not used in the application so those should not be changed. Based on your responses, all items were marked green "Used & Complete" but I could at least identify a few items that do not follow our recommendations. 

    • LDO5P0 is using 22uF and we recommend 4.7uF (TYP) . Capacitance range: 2.7uF to 10uF.
    • LDO3P3 is using 22uF and we recommend 4.7uF (TYP). Capacitance range: 2.2uF to 10uF
    • For V5ANA, we recommend a 1uF cap which should be placed close to the pin on the layout. 
    • PVINLDOA2_A3 could be connected to GND because LDOA2 and LDOA3 are floating (not used).
    • For the external FETs used on the buck controllers, we recommend CSD87331Q3D, CSD87381P, and CSD87588N depending on the required maximum current. I'm not familiar with the external FETs on your schematic but if they have equivalent or better performance to the ones recommended in the datasheet, then a prototype evaluation could be run with those. 
    • The resistor values on the ILIMx pins are the same ones we used in the design guide. Please note those were chosen based on the RDSon for our recommended FETs. We provide the "Buckx ILIM Calculator" as part of the design checklist to make it easier for customers to calculate the ILIM value if other FETs are used and the design goals are different.  
    • Why is Buck6 driving a third FET? 

    Thanks,

    Brenda

  • 0 in reply to Brenda Diaz
    Mastermind 9995 points

    Hi Brenda

    Thank you for your detailed explanation and reply

    I will give feedback to customers

  • +1 in reply to GARETH OU
    TI__Mastermind 19776 points

    Thanks Gareth! If all your questions have been answered, please select the option "..resolved" so we can close this E2E. Feel free to submit a new request (and include the link to this E2E) if you have questions in the future related to the same schematic.