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Peak current mode controlled phase shifted Full-bridge

rongyuan li
Prodigy 20 points
Other Parts Discussed in Thread: CONTROLSUITE

How can I configure the ePWM to implement a peak current mode controller into a phase shifted full-bridge DC-DC converter?

  • 0
    Genius 5170 points

    As far as I know ePWM module itself doesn't have any specific feature to implement peak current mode algorithm however the latest Piccolo devices may have analog modules to implement peak current mode typ eof algorithms. Have you checked out the latest Piccolo family devices?

  • 0 in reply to Arefeen
    Prodigy 20 points

    Thank you,

    Piccolo B has three analog comparator, and using the comparator output, it's possible to set PWM off by Trip-Zone, but it can not affect Compare-Logic and Action-Qualifier in ePWM module.

    is it possible to change TBPHS using output of analog comparator?

  • 0 in reply to rongyuan li
    Genius 5170 points

    You should be able to generate an interrupt from comparator output to manage TBPHS .... TI power gurus may have better suggestions for you.

  • 0 in reply to Arefeen
    Intellectual 490 points

    Hello,

    any suggestion about this problem?

    I am using a 28069 and I need to perform a phase-shift control in peak current mode.

    I can use the CBC trip generated by the current comparator.

    Once the interrupt is generated, how to manage TBPHS register?

    Thanks,

    Michi

  • 0 in reply to Michi M
    TI__Guru 57255 points

    Michi,

    I would recommend taking a look at the software (and documentation) for the TMDSHVPSFBKIT.  This should help you to get some idea of how TI has implemented phase-shifting via CBC trips in a peak-current mode design.

    In controlSUITE it can be found at the following:
    \controlSUITE\development_kits\HVPSFB_v1.1\


    Thank you,
    Brett