How to calculate STM32H743 power consumption and dissipation?

Jonah9Veh · ‎2025-01-13

How to calculate the power consumption of STM32H743 from datasheet, theoretically as close as possible to the actual value? What parameters should be considered?

Also, I want to calculate the heat generated from MCU -- dissipated power (in W). How to calculate that?

Andrew Neil · ‎2025-01-13

You can never do an exact calculation - it will always be an estimate

The datasheet gives you power consumption figures - use them.

There is also a power estimator in CubeMX (standalone, or within CubeIDE).

Or use a dev board, and measure it.

PS:

https://www.st.com/resource/en/datasheet/stm32h743vi.pdf#page=110

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.

mƎALLEm · ‎2025-01-13

+ You can also refer to AN5036 "Guidelines for thermal management on STM32 applications", see the section 6 Thermal analysis examples

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