• State Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 63 subscribers
  • Views 324 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.

TPS61085: Can I use EN to set a new UVLO?

zehua hu
Intellectual 935 points
Part Number: TPS61085

Can I use divider resistance on EN pin to set a new UVLO? Now the UVLO is 2.2V. For example,if I want IC starts after VIN rises to 4V,  can I set a 10K-pull-up and 10K-pull-down resistance on EN ?

Thanks!

  • 0
    TI__Mastermind 40080 points

    yes, you can. But there exist some tolerance. sometimes, IC can startup even when the  EN voltage is lower than 2V, like 1.7V. 

  • 0 in reply to Helen chen
    Intellectual 935 points
    Hi Helen，
    Thanks for your quick reply. I do not find this parameter from datasheet. Can you tell me the exact tolerance ? if not, the general tolerance is also OK.
    Thanks.
  • 0 in reply to zehua hu
    TI__Mastermind 40080 points

    Hi Hu,

    Please check the following screen-shot: EN signal High minimal value is 2V, this means, when EN is higher than 2V, "all " the IC should startup. so if the customer want to make the IC startup succeessfuly, the EN signal should >=2V.   But some of the IC may startup  at a value low than 2V, we foudn it is 1.7V before.  I'll check with the design team.  if you want to control the startup precisely at Vin=4V, then extra ciruit, like the operational amplifier is needed.