• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 452 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

UCC28070: Disabling phase B

Russell Wetherley1
Expert 4255 points
Part Number: UCC28070

Hello E2E,

I like the feature set of the UCC28070 for a 150W application, but I am curious if it is possible to disable phase B without affecting the operation of of phase A?  I see the benefits in the DS about reduced ripple and external component values, but two phases seems like quite a few components for 150W maximum. It seems like grounding the output of the CS transconductance amp should shut down that particular phase but I wanted to confirm. Will this work?

Thanks!

Russell

  • 0
    TI__Expert 3095 points
    Hi Russell Wetherley1,
    Looking at the block diagram it seems to me that both phases are completely independent.
    They are just both driven from fixed frequency clocks with different phase and the same current reference is applied to both channels.
    I think is should not be necessary to do anything other than just not populate the second channel. In other words just leave GDB open.
    Thanks
    Joe Leisten