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TMP708: hardware-controlled temperature cut-off circuit?

AnBer
Mastermind 30215 points
Part Number: TMP708
Other Parts Discussed in Thread: LM26, TMP61, , LM56, TMP61-Q1

Team,

The goal is to design an hardware-controlled temperature cut-off circuit.
I have checked already the "chap.6 How to protect control systems from thermal damage" section of the Engineer's guide to temp sensing - SLYY161 that gives some options (TMP708, LM56, LM26, TMP61).

-Do we have some additional documents (TI ref design, ..etc) that can help for safety related aspect of the design of such circuit? or choosing the according design trade-offs (IC package, PCB layout and layers, sensor positioning, ..etc)?

-Could you please elaborate if TMP6x thermistors can be a viable option for this use case?

-The below devices are marked as "Functional-safety capable". Will they bring some benefit for this use case compared to the devices we advise above in SLYY161?
https://www.ti.com/sensors/temperature-sensors/products.html#o7=Analog%20temperature%20sensors;Digital%20temperature%20sensors;Thermistors&p3316=Functional%20Safety-Capable

Thanks in advance,

A.

  • 0
    TI__Genius 9675 points

    Hi AnBer,

    Some of our temperature sensors are categorized as Functional Safety-Capable. For these devices we do provide functional safety information, such as FIT rate and FMD, to help customers evaluate the products for use in their functionally safe systems. As you've identified, the device that have available documentation to date can be found here.

    The TMP6 thermistors can surely be used as a viable option for this use case. Functional Safety documentation for the TMP61-Q1 can be found on the product folder.

    Jalen