buck-boost converted with feedback using NUCLEO-H753ZI

qinjie · ‎2025-01-24

Is it possible to use the NUCLEO-H753ZI board to vary the PWM signal to the mosfets so to achieve constant output voltage? the input voltage will be always varying. If so may I know how should I do it?

Peter BENSCH · ‎2025-01-31

Welcome @qinjie, to the community!

In principle, this can work, but requires a deep dive into the working principle of buck-boost converters, the control from the STM32 and the associated programming. The AN4449, part of the 32F3348DISCOVERY, which is based on the STM32F334C8, can provide an initial insight into this. However, its principle can be adopted to the STM32H753ZI because it also has a high-resolution timer.

Hope that helps?

Regards
/Peter

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qinjie · ‎2025-01-31

Hey Peter

Thank you for your reply! I am still very new to working on STM32 in general, where should I start and do you have any information I can read/study on to gain better understanding to gain more insights to be able to implement the circuit? In the mean time I will try to find more info on the AN4449 and 32F3348DISCOVERY.

Best regards
Qin Jie