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TAS5431-Q1: Temperature characteristics and power fallback function confirmed?

Alan Xia
Expert 6225 points
Part Number: TAS5431-Q1

Tool/software:

Hi team，

The datasheet mentions AEC-Q100 Qualified for automotive applications– Temperature grade 1: –40°C to 125°C, TA --- This refers to the ambient temperature of the working environment, right?
We would like to know, when the ambient temperature is 125 degrees Celsius, what is the Junction temperature of the AMP chip under full power working state?

The Junction temperature is 155~170 degrees Celsius --- This means that the chip will shut down for self-protection after the Junction temperature reaches 155. What is the limit temperature of full performance? --- We understand that the chip should have performance regression after reaching a certain high temperature, and then shut down after the Junction temperature reaches 155. We would like to know at what temperature the chip will no longer run at full performance?

  • 0
    TI__Mastermind 37510 points

    Hi Alan

    Alan Xia said:
    We would like to know, when the ambient temperature is 125 degrees Celsius, what is the Junction temperature of the AMP chip under full power working state?

    Will quickly OTSD under this condition.

    Alan Xia said:
    What is the limit temperature of full performance?

    No define of this one.

    Alan Xia said:
    We would like to know at what temperature the chip will no longer run at full performance?

    What is the performance you are looking at now? There's lots of parameter will slowly changing along with temperature, like Rdson will keep increase with temperature, at 125C may increase more than 90%. With Rdson increase, you'll find efficiency will slowly get lower, and 1%/10% THD power point will decrease.

    Can't define what is the full performance temperature?