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TS5A22364: The junction temperature difference between TS5A22364DGSR and TS5A22364QDGSRQ1.

Alan Xia
Genius 9880 points
Part Number: TS5A22364


Hi team,

The customer is currently evaluating the differences between the TS5A22364DGSR and TS5A22364QDGSRQ1. We observe that the thermal resistance parameters are the same for both industrial and automotive-grade products in the VSSOP package. However, the automotive-grade product can operate at 125°C, while the industrial-grade product can only operate at 85°C.

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Therefore, based on the typical junction temperature of 150°C for automotive-grade chips, is the operating junction temperature limited to only 110°C?

Or, at what junction temperature can TI guarantee that the industrial-grade TS5A22364 will not shut down?

  • 0
    TI__Expert 4705 points

    Hi Alan,

    TI guarantees what is on the datasheet, so for the TS5A22364-Q1 it is up to 125C and the TS5A22364 it is up to 85C.

    Best,
    Katy

  • 0 in reply to Katy West
    TI__Genius 9880 points

    Hi Katy，

    We can guarantee an ambient temperature of 85℃. Do we have the highest junction temperature parameter that we can share?

  • 0 in reply to Alan Xia
    TI__Expert 4705 points

    Hi Alan,

    TI guarantees what is on the datasheet, so for both Q1 and non-Q1, that includes 85C. TI does not guarantee outside of the datasheet specifications, so only the Q1 device will be rated higher. If the customer would like to use at a higher temperature, they can perform evaluations on the devices themselves and use engineering judgement, but if they want TI's assurance of performance above 85C, they should use the Q1 device.

    Best,
    Katy

  • 0 in reply to Katy West
    TI__Genius 9880 points

    Hi Katy，

    I understand that 85°C refers to the ambient temperature. If we're talking about the chip itself, what temperature should the customer use for evaluation? After all, I believe the power consumption of an individual chip varies depending on its operating conditions.

    Or could you confirm, under maximum power consumption (approximately what is the maximum power consumption?) combined with an ambient temperature of 85°C, what would the chip's maximum temperature be?

  • 0 in reply to Alan Xia
    TI__Expert 4705 points

    Hi Alan,

    I would suggest evaluating at the operating temperature the customer expects the device to be used at, as well as the max. 

    To calculate the max junction temperature, you can use the excel sheet found in this FAQ!

    Best,
    Katy