The STM32WB55 microcontroller have SMPS internally.
Can I use it to convert AC power to DC power for the microcontroller?
If possible, I want to supply RF inductive charging power directly to the microcontroller.
it tells you that the minimum input is, essentially, zero - so you can't apply AC.
Therefore you would need to provide any rectification externally.
The datasheet also tells you that it is a step-down SMPS, so it wouldn't be able to cope with a rectified AC supply - which drops to zero once (half-wave) or twice (full-wave) per cycle.
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