This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

Using the UCD3138A to control dual parallel LLC converters

Other Parts Discussed in Thread: UCD3138A

I would like to use the UCD3138A to control two LLC converters in parallel.  Looking at the datasheet I believe this should be possible, but I don't think it can be done using the Fusion Digital Power Designer.  

As or right now here is what I have planned.

  • DPWM0A/B controls the primary side of LLC converter #1
  • DPWM1A/B controls the secondary side synchronous rectification of LLC converter #1
  • DPWM2A/B controls the primary side of LLC converter #2
  • DPWM3A/B controls the secondary side synchronous rectification of LLC converter #2
  • EAN/P0 monitors the output voltage of the two LLC converters
  • EAN/P1 monitors the output current of LLC converter #1
  • EAN/P2 monitors the output current of LLC converter #2
  • Will not be using DTC since there are only two DTC inputs and I have four Sync FETs

I'm not quite sure how to carry this out though.  Do you guys have any suggestions or code snippets you could share that would be helpful?

Thanks!

Austin Bartz