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UCC28C45: what caused the difference of recommended operating temperature between UCC28C45 and UCC28C45-Q1

Howard Zou
Genius 12365 points
Part Number: UCC28C45

Hi,

since both device's absolutely maximum temperature are 150C.

I wonder why do we have different parameters for recommended operating conditions?

Is it just because we test our Q version device under 125C, but we only test our non Q version device under 105C?

My customer's end equipment may increase to 115C, they wonder if we have any statistic to show how non-Q version device device would behave in such a condition? For example, like frequency dithering or voltage not stable, or something like that.

  • 0
    TI__Mastermind 27145 points

    Hi Howard,

    Section 7.6 of the datasheet shows several parameters and how they shift over -50°C to 125°C. I'm afraid we don't have data beyond what is shown in the datasheet regarding hot temperature.

    Best Regards,

    Ben Lough

  • 0 in reply to Benjamin Lough
    TI__Genius 12365 points

    Ben,

    thanks.

    Then what caused the difference of recommended operating temperature between UCC28C45 and UCC28C45-Q1, regarding both can endure 150C maximum junction temperature.

    Is it guaranteed through test for Q version device?

  • 0 in reply to Howard Zou
    TI__Mastermind 27145 points

    Hi Howard,

    The Q1 device was characterized up to 125°C but the non-Q1 device was likely not fully characterized at 125°C. The EC table for UCC28C45-Q1 covers all the way up to 125°C but the UCC28C45 EC table only covers up to 105°C. There are some parameters shown in section 7.6 that show data up to 125°C but it does not show every parameter in the EC table up to 125°C

    Best Regards,

    Ben Lough