• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 302 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.

LM5141: Duty cycle limitation and Max current

bibin alex
Prodigy 230 points
Part Number: LM5141

Hi,

1. can you provide max duty cycle of LM5141: Data sheet doesnt say but in website it say 99% and but in webench design it is limted to 85%. Can you provide exact information?

2. What is max current LM5141 can be controlled? In website says 20A. But webench design limited to 10A.

Please reply

Thanks

Bibin Alex

  • 0
    TI__Mastermind 22301 points
    Hello Bibin,
    For the LM5141 there is no defined maximum duty cycle, but instead the duty cycle limitation is controlled by the minimum off-time (100ns) and the configured switching frequency.
    However in practice the controller will reduce the frequency as much as it needs to try and achieve regulation, hence 99% specified in the datasheet.

    Also the LM5141 does not have a limit for the current it can control, that is limited by the inductor and FETs.

    Hope this helps,
    -Orlando