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STM32F437AIH6 thermal shutdown?

Question asked by on Apr 25, 2017
Latest reply on Apr 27, 2017 by Amel N

Hi, I am using an STM32F437AIH6 (-40 - +85dC device) in a custom design and it is failing in the thermal test (MCU completely stops). During the test I measure the MCU case temperature and MCU ambient temperature with a thermocouple.

The case temperature measures around 90dC, the ambient around 86dC right before it fails.

Peripherals in use: SDRAM, I2C accelerometer, 2x CAN + 1x ADC. So I expect not too much power dissipation in the chip (max. 0.5W I guess) so I also do not expect that the maximum junction temperature is reached.

Does the STM32F437 feature some thermal shutdown protection which I do not know of?

What could be the reason of this failure?