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UCC27524A-Q1: Allowable power dissipation

Takeshi Kasuya
Expert 3940 points
Part Number: UCC27524A-Q1

HI,

I have a question of allowable power dissipation over temp.

There is no data of allowable power dissipation vs Tj in the datasheet.

Do you have the data?

If so, can you share?

Regards,

Kasuya

  • 0
    TI__Guru**** 189399 points

    Hi, Kasuya-san,

    The simple answer is you need to use the formula:

    TJ = PD * Rth + TA

    Where Rth is from section 7.4 in the datasheet.

    However, the real trick here is calculating PD. In order to do that, please review section 9.2.2.2 Drive Current and Power Dissipation of the datasheet. This should help guide you in calculating the power dissipation for your conditions.

    In the recommended operating conditions table. we show 140C as the maximum recommended junction temperature.

  • 0 in reply to Don Dapkus
    TI__Expert 3940 points

    Hi,

    Thank you for the prompt response.

    There is no data of PD max in the datasheet.

    You mean that I can calc PDmax based on section 9.2.2.2?

    Device of other vender shows below figure in the datasheet. 

    Can you provide such data?

    Regards,

    Kasuya

  • 0 in reply to Takeshi Kasuya
    TI__Genius 13445 points

    Kasuya,

    I will respond via email while I mark this thread as "resolved".

    -Mamadou