• State Resolved
  • Locked Locked
  • Replies 1 reply
  • Subscribers 62 subscribers
  • Views 218 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.

UCC28180: about restart

ACGUY
Guru 11170 points
Part Number: UCC28180


Hello E2E,

Our customer is evaluating the UCC28180 on test board.
In the input voltage instantaneous stop test, when the stop time is 1-msec, some individuals restart normally and some individuals require 200-msec to restart.
When the input voltage drops, VCC also drops, but it does not reach UVLO.

Does TI know what caused it?

Regards,
ACGUY

  • +1
    TI__Genius 9140 points

    hi ACGUY,

    it is likely that at some condition of input voltage instantaneous stop, the Vcomp Voltage do not drop , then input voltage back again, at this condition, since there is no restart even, the stop time will be 1 msec , when Vcomp is full discharge, then the controller need a fully restart even, that cause a longer start up at 200ms.

    and this two evens should all be a normal logic for this controller.