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MSP430F5 Thermal Shutdown temperature level?

Other Parts Discussed in Thread: MSP430G2230-EP, MSP430F5247

hi,

do you know the thermal shutdown temperature level of MSP430F5 series? (QFN Package) 

  • Do they have that feature?
  • Hi Erik,

    This feature isn't supported on MSP43x devices. As a workaround, you may be able to check the internal (junction) temperature sensor and manually shutdown the device after reaching a certain temperature with code. However, this may not be the best method if the device needs to start back up automatically after the temperature drops.

    Another approach could be to use a simple high temperature microcontroller (like the MSP430G2230-EP, which operates up to 125C) to shut down system components when a certain temperature is exceeded and restart them when the temperature drops. However, this adds another device to the BOM.

    I'd like to learn more about why the thermal shutdown feature is important. What's the application here? What's the expected temperature range for this application? What would you want the thermal shutdown feature to do (e.g. just shut down the device, shut down/restart automatically, etc.)? Could one of our high-temp or enhanced-product microcontrollers be used here instead? I'll reach out to you directly in case you want to discuss this information privately.

    Regards,

    James

    MSP Customer Applications
  • Dear James,
    This is because my customer found the MSP430F5247 always can't be reset while the temperature is high to 60~70 degree C(case temp), the MSP430 seems get into an un-certain status, but it can be restart after an power cycle(the temperature is still as high as 60~70C). And it can be normally reset if the temperature is never higher than 60~70 degree C.
  • Hi Erik,

    This is definitely strange behavior. I'm concerned that the junction temperature (Tj) is exceeding the upper limit, 85C (see Table 5.3 in the datasheet). Typically, Tj is higher than the case temperature. Is the customer able to read the internal temperature before/when this happens? Keep in mind that the internal temperature sensor offset can be as much as +/- 20C, so single point calibration should be performed to minimize this offset error.

    Also, let me point out errata PMM18, which is affected by temperature. However, it may not be applicable for the customer's application based on the behavior described above.

    Regards,

    James

    MSP Customer Applications

  • Hi Erik,

    Were you able to resolve your issue?

    Regards,

    James

    MSP Customer Applications
  • Dear James,
    Thanks for your concern.
    My issue is solved!