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BQ25756: température sensor consumption

Simon Fourquier
Prodigy 50 points
Part Number: BQ25756


Tool/software:

Hello

On the datasheet of the BQ25756 it is write for the TS pin

"Recommend 103AT-2 10-kΩ thermistor."

But a 10k thermistor and recommanded RT1=5.24k and RT2=30.31k with VREGN=5V have a consumtion of ~ 0.4mA.It is a high consumtion.

Why is recommanded 10k? Can i use 100k with 52.4k for RT1 and 300k for RT2?

  • +1
    TI__Mastermind 32185 points

    Hello Simon,

    For the most part, REGN (which powers the TS pin) only operates when the battery is charging. The 0.4mA is not being consumed all the time. Does this work for your system?

    You could use a 100kΩ and a 52.4kΩ resistor, but this would make the TS pin more susceptible to noise.

    Let me know if you have any questions about this.

    Best Regards,
    Ethan Galloway