Half Bridge inverter control

[LucasRosa]

Hi team!

I am starting a new project involving a CC/CA Half Bridge. I need to choose an MCU to handle the digital control and send voltage and current measurements over communication (UART or SPI). The switching frequency will be 50kHz, voltage and current must be measured, PWM must be refreshed at the switching frequency rate, and the measured data must be sent once per second.

My research led me to the STM32F303xB and STM32F334x4. However, I am not sure if there is a better option for this task.

Regarding the MCU, my only requirements are low cost and an LQFP-48 or 32-pin package (small size but not BGA).

What MCU do you suggest for this application?

Thank you.

[AScha.3]

Hi,

the F3 series have cheaper members, see mouser:

https://www.mouser.de/c/?q=STM32F3&instock=y&sort=pricing

so if an STM32F301K8U6 has enough flash for your program, this would be quite cheap.

https://www.mouser.de/ProductDetail/STMicroelectronics/STM32F301K8U6?qs=DqCdCwOw4%2F6mHbmYVazqEA%3D%3D

+ 72MHz core, 1x advanced timer, 1x 5Ms ADC , UART , SPI .

Just try : new project in IDE and set the pins you need, to see : good or not.

[LucasRosa]

Is the F3 series the best choice? I ask because ST has so many options that my solution might be elsewhere.

[AScha.3]

The "best" ?  Only you can decide this. 🙂

ADC, TIM , UART, SPI have almost all of the hundreds of STM cpus...

Maybe look at selector:

https://www.st.com/en/development-tools/st-mcu-finder-pc.html