• Locked Locked
  • Replies 2 replies
  • Subscribers 63 subscribers
  • Views 641 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.

TPS54560- 4 modules in parallel to give total 20Amps output

Amit More
Prodigy 10 points
Other Parts Discussed in Thread: TPS54560

If i use four TPS54560 modules giving a common input of 48V. And setting the output voltage of each to 12V. Connecting all output together. Will the four modules will be able to supply 5A each and total of 20A ???

http://mt-system.ru/sites/default/files/docs/texas_instruments/news/tps54560_sch.png

Will this design of 20A converter feasible???

  • TI__Guru**** 191445 points
    In general you cannot do that. There is no direct mechanism in theTPS54560 to force current sharing. Theoretically, if you tie the COMP pins and VSENSE pins together you can reasonably share current, but the GMPS specification only governs the current to voltage rate of change, rather than absolute current to voltage. You may expect +/- 20 percent accuracy. I have successfully designed 2 parallel converters with a different but similar device. Even for two channels the layout is critical and very sensitive. I have not tried any more than that. You will probably be better off to use a controller that can deliver the full 20 A, or possibly a dedicated multiphase controller that is purposely designed for current sharing.
  • in reply to JohnTucker
    TI__Guru**** 191445 points
    In general you cannot do that. There is no direct mechanism in theTPS54560 to force current sharing. Theoretically, if you tie the COMP pins and VSENSE pins together you can reasonably share current, but the GMPS specification only governs the current to voltage rate of change, rather than absolute current to voltage. You may expect +/- 20 percent accuracy. I have successfully designed 2 parallel converters with a different but similar device. Even for two channels the layout is critical and very sensitive. I have not tried any more than that. You will probably be better off to use a controller that can deliver the full 20 A, or possibly a dedicated multiphase controller that is purposely designed for current sharing.