• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Subscribers 31 subscribers
  • Views 225 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

TMP390: Similar features but 48V support?

Wayne Eckertson
Prodigy 190 points
Part Number: TMP390
Other Parts Discussed in Thread: TMP300

Tool/software:

I am looking for a device similar to the TMP390 but will support 48V (typ) supply voltage.  The TMP390 will only support 5V (typ) supply. 

Wayne

  • +1
    TI__Expert 4990 points

    Hello Wayne,

    Unfortunately the highest any of our temperature switches will go for supply voltage is 18V for the TMP300.

    Do you happen to have a buck converter or LDO elsewhere on your current design? This could make it easier to step down from a higher voltage to meet the TMP390's input voltage requirements.

    Alternatively, a low-cost solution could be using the TMP300 in conjunction with a Zener diode and a series resistor to achieve a low enough voltage for the TMP300.

    Lastly, to better understand your setup, what is the application for this temperature switch?


    Regards,

    Harry

  • 0 in reply to HarryG
    Prodigy 190 points

    Thank you for investigating 48V options.  Our previous design uses the Zener Diode circuit and has worked well for us.  I am just looking for options to reduce part count on our next generation of product.

    The 48V rail is the input to our PCBA.  We use a temperature sensor to keep all downstream devices powered off if the temperature is below a cold threshold and above a hot threshold. 

    Wayne

    . 

  • 0 in reply to Wayne Eckertson
    TI__Expert 4990 points

    Thank you Wayne for the explanation. While we don't have anything for this right now, I will pass this feedback to our development team.

    Please let us know if we can help you in any other way.

    Regards,

    Harry