Why only 20vdc rating when it has 60v NFET?

[BFalcon]

https://community.st.com/s/question/0D50X0000CCp5LUSQZ/bg431besc1-20vdc-max

[Saurabh SONA]

Going by the specs, it is an application specific board with size constrains designed for Drones with battery packs up to 6S LiPO.

Higher rated components (especially capacitors) would have increased the form factor/cost of the design.

For higher voltage there is already X-NUCLEO-IHM08M1 which can be used with NUCLEO-G431RB (if you wish to evaluate your application using G4 series MCU).

[BFalcon]

Oddly ST web pages on my review of all EVM's for this MCU did not indicate a higher voltage G431RB resource kit. Oddly the acronym FOC works for 6 step systems that do not require Halls. Hence some confusion on ST web site to relate embedded SVPWM or 6 step trapezoidal FOC. They are both FOC control methods. Only sensorless 6 step FOC determines zero crossing via BEMF timer controls. Hence the need to fully qualify what type of FOC the MCU supports on your ST web pages to reduce any confusion. The terms Clarke/Park tend to weed out the acronym FOC being type space vector.

[BFalcon]

Link to ST web page, if I click on a picture of the EVM's does not do anything. Farther down the page is where the G431B links the 20v EVM. The NUCLEO-G431RB was not shown or suggested from the MCU features point of view.

https://www.st.com/content/st_com/en/stm32-motor-control-ecosystem.html

[BFalcon]

X-NUCLEO-IHM08M1 is only rated 15Arms and tops out 48V, both are under rated for larger low impedance SPM industrial design purposes. The NUCLEO-G431RB web page only mentions STM32 family does not even list it has G431B 170Mhz MCU or at all in the PDF download.