• State Resolved
  • Locked Locked
  • Replies 4 replies
  • Answers 1 answer
  • Subscribers 62 subscribers
  • Views 188 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

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.

UC2902: The junction temperature.

Kengo.Y
Guru 10710 points
Part Number: UC2902

Hi team,

In UNITRODE's datasheet, the Junction temperature was 150°C.
Now it is 105°C in TI's datasheet.
Isn't that a misprint?
I believe that is a low absolute maximum rating for a power supply IC.

Sincerely.
Kengo.

  • 0
    TI__Mastermind 44620 points

    Hi Kengo-san,

    The absolute maximum storage temperature is 150°C. The recommended maximum operating temperature is 105°C. Operating at a higher temperature will likely impact the accuracy of the sharing. For new designs, we recommend the UCC29002 as this the newer and more accurate version.

    I hope this helps to clarify.

  • 0 in reply to JCHK
    Guru 10710 points

    Hi John-san,

    Thank you for your comments.
    I understood.

    Sincerely.
    Kengo.

  • 0 in reply to Kengo.Y
    Guru 10710 points

    Hi John-san,

    I'd like to know the additional question.

    If the junction temperature exceeds 105°C, please let me know how it will affect the UC2902.

    My customers have been using them since the  UNITRODE and they are designed at 150°C.

    Sincerely.
    Kengo.

  • +1 in reply to Kengo.Y
    TI__Mastermind 44620 points

    Hi Kengo-san,

    The datasheet limits are guaranteed up to 105°C so if the IC is above that, the IC can operate outside the defined limits. One key spec that might be compromised could be the overall accuracy of the sharing control. 

    I hope this answers your question.