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WEBENCH® Tools/TPS54302: IC TheataJA Effective value

Patrick Chen(TPE System & Application)
Expert 3430 points
Part Number: TPS54302

Tool/software: WEBENCH® Design Tools

Hi Sir,

I would like to learn how we caculate the "IC TheataJA Effective value" on the Webench OP value.

Take TPS54302 for example, the IC TheataJA is 87.1°C/W, but the "IC TheataJA Effective value" on the Webench OP value is 60°C/W,

I would like to learn how we get the 60°C/W.

Many thanks.

Patrick

  • 0
    TI__Intellectual 1020 points

    Hi Patrick,

    The datasheet spec is mostly based on a JEDEC standard board and in reality with the EVM board, the effective thetaJA could be different.
    In WEBENCH, we chose the Theta JA corresponding to the matches that we did against the measured thermal data on the EVM board.

    Thats how we got a number of 60 C/W.

    Let me know if anything else required from my side

    thanks
    sahil