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TPS53624: tps53624 junction temperature

Sammi Shang
Expert 4450 points
Part Number: TPS53624
Other Parts Discussed in Thread: TPS51727, TPS53626, TPS53647, TPS53627

Dear team,

My customer are curious about the working temperature of TPS53624 when using it. 

From datasheet, Ta seems between -10 ~ 105 degree C, but Tj is between -40~-105 degree C. My customer wonder if TPS53624 could work at -40 degree C? They have not passed their circuit's low temperature test. 

Thanks.

Best regards,

Sammi

 

  • 0
    TI__Genius 11095 points

    Hi Sammi, TI cannot guarantee operation at -40C for this device. It may work on a typical part, but we have not designed, simulated or tested it to -40C.

  • 0 in reply to Matt Schurmann
    TI__Expert 4450 points

    Hi Matt,

    Many thanks for your reply. I just want to make sure that if we have IC could replace TPS51727(used before) or TPS53624 and still work stable below -40 degree C?

    Thanks.

    Best regards

    Sammi

  • 0 in reply to Matt Schurmann
    TI__Expert 4450 points

    Hi Matt,

    Just confirmed with cusotmer and supplement some information:

    customer need IC to pass cold start (-40 degree C) test, but for the working condition of IC, it should not be as low as -40 degree C. Could you kindly give some suggestion on IC replacement or suggestion about how to pass cold start test?

    Thanks.

    Best regards,

    Sammi

  • 0 in reply to Sammi Shang
    TI__Genius 11095 points

    Hi Sammi, Are you saying the customer has a board, which is failing cold temp start-up now? 

    If using a different design is possible, you would be better off with a device designed for this temperature range, like TPS53626 or TPS53647.

  • 0 in reply to Matt Schurmann
    TI__Expert 4450 points

    Hi Matt,

    Yes, customer has a board. They used TI TPS51727 before but failing in cold temp start-up. Then they changed to TPS53624 which marked support -40 to 105 in our website,but still failing in cold temp start-up. The cold start-up is an important part in their product test, but the real application environment would not need last at -40 degree C so long. Customer wonder if they could have some design method to pass this cold start-up issue?

    I will check with customer if they could change to TPS53626 or TPS53627. But seems they need to make a huge change on the board.

    Thanks.

    Best regards,

    Sammi