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CCS/TMS320F28335: Possible to implement phase shift and variable frequency for full bridge simultaneously?

oscar yu33
Prodigy 10 points

Part Number: TMS320F28335

Tool/software: Code Composer Studio

Hi all,

I am wondering if the F28335 is capable of implementing both phase shifting and variable frequency simultaneously? I haven't been able to find many F28335 full bridge examples to begin with. I did find a full bridge example here:

http://www.ti.com/lit/ug/sprug04a/sprug04a.pdf

However, the initialization sequence is not shown and I'm hitting errors during compilation (symbols not found). Does anyone know if this is possible on this platform? Thank you again!

  • 0
    TI__Genius 10820 points

    Hi Oscar,

    Yes this is possible. Are you trying to change frequency and maintain the phase shift (in degrees), which would mean changing TBPHS value accordingly, OR are you trying to change the frequency and phase shift (in degrees) at the same time? In either case, it is possible to do so. In the latter case, you have to be mindful about the times at which PWM registers get updated with respect to the switching cycle. Please see my post below for reference:

     

    I hope this helps.

    Hrishi