• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Subscribers 63 subscribers
  • Views 295 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.

Original question:

TPS63070: TEC controller boost-buck or driver

LM5176: TEC driver design support

Du Lo
Intellectual 400 points
Part Number: LM5176
Other Parts Discussed in Thread: TIDA-050017,

I've read the TIDA-050017 TEC Driver Reference Design. I have a TEC that is rated at 12V and 8.33A.

I used Webench Designer to help select a possible solution: https://webench.ti.com/appinfo/webench/scripts/SDP.cgi?ID=A20FB09589BB596C

Would this design be suitable to drive the TEC using the Digital PI control described in the TIDA-050017?

Thank you for the help!

  • 0
    TI__Mastermind 42751 points

    Hi Du,

    thank you for using the E2E forum.

    Please let me look into this and come back in 2-3 days.

     Best regards,

     Stefan

  • 0 in reply to Stefan Schauer
    Intellectual 400 points

    Thank you Stefan,

    One more point of information. During testing, we found that the TEC required 16V to achieve the cooling performance we needed. We don't need as much on the heating side, so the plan is to operate the buck boost to output ~1V to 28V from a 12V input (150W power brick).

    Thank you for looking into this.

  • 0 in reply to Du Lo
    TI__Mastermind 42751 points

    Hi Du,

    thanks for the additional info.

    Best regards,

     Stefan

  • +1 in reply to Stefan Schauer
    TI__Mastermind 42751 points

    Hi Du,

    sorry, it took some more days.

    Yes, the LM5176 can do that but there is one limitation you need to consider.

    During startup the output voltage cannot be higher than the input voltage.

    As the TEC element is connected between input and output the TEC element bias the output with the input voltage.

    Therefore, you need to set the initial output voltage to at least the input voltage or the max input voltage if this as a variable range.

    After the startup you can then readjust and/ or regulate to the required output voltage level. This should not be a big issue as the response of a TEC element is quite low.

    Best regards,

     Stefan