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Howto configure timer for half bridge

Question asked by Roger H on May 6, 2018
Latest reply on May 13, 2018 by waclawek.jan

Hello I am prototyping with an STM32F3xxxx and trying to figure out how to configure a timer/s to operate a half bridge smps.

 

The normal situation would be that there is a divide by two circuit in the block labelled "output control" however there doesnt seem to be one in these chips, so perhaps it is not possible to drive a half bridge from a single channels two outputs ?

 

I can imagine perhaps you could do it with two channels but then this leads to a very dangerious and potentially transformer saturating situation when trying to change the duty cycle (as the two channels have to be changed seperatly).

 

Unfortunatly all the ST material seems to major on motor control and does not cover smps operation at all.

 

I hope someone out there has experience of this and could give me some clues please

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