Thermal Analysis Example; Evaluation Board With Stm32Mp157 Mpu; Stm32Mp157 Power Dissipation; Figure 10. Stm32Mp157X-Ev1 - ST STM32 Application Note

6

Thermal analysis example

This section shows an example of thermal analysis performed on evaluation boards with STM32MP157 MPUs.
This analysis provides answers to the following questions (at maximum ambient temperature 85 °C):
• How much is the power dissipation, taking into account of the leakage?
• Is Tj < 125 °C?
• Is there a risk of thermal runaway?
6.1

Evaluation board with STM32MP157 MPU

This thermal analysis has been done on an evaluation board with an STM32MP157 device, without casing (see
the figure below).
This picture is not contractual.
While running commands, the script monitors the following:
• the CPU load with mpstat
• the board temperature via / sys / class / hwmon / hwmon0 / temp1_input
• the memory used via the free command
AN5036 - Rev 3
Figure 10. STM32MP157x-EV1
AN5036
Thermal analysis example
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