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BQ25622EVM: Design Files

MW
Prodigy 20 points
Part Number: BQ25622EVM
Other Parts Discussed in Thread: BQ25622

Tool/software:

Hallo,

Is it possible to receive design files of the BQ25622EVM please?

I would like to check the routing for the device

Thank you,

  • 0
    TI__Guru 59141 points

    Hi,

    Sure. Is it ok to email the PCB file to you?

    Thanks,

    Ning.

  • 0 in reply to Ning T
    Prodigy 20 points

    Yes please, martin.wieser@tuwien.ac.at

    To use the device without thermistor are these the values 5.23 and 30.1kOhm as in the eval board schematics. And input voltage for that resistors should be from TS_BIAS?


  • 0 in reply to MW
    TI__Guru 59141 points

    Hi,

    Using TS_BIAS may save some power. Please see below.

    8.3.5.4.5 TS_BIAS Pin (BQ25622 Only)

    The The BQ25622 has the TS_BIAS pin to isolate the battery temperature sensing thermistor and associated resistor-divider from REGN. The 103AT thermistor with typical resistor-divider network requires about 400 μA to bias. The BQ25622 provides the TS_BIAS pin, which is internally connected to the REGN LDO via a back-toback MOSFET switch. When no temperature measurement is being taken, the switch is disabled to disconnect the thermistor and resistor-divider from the REGN LDO, saving the 400-μA bias current from being expended unnecessarily. The TS_BIAS pin has short-circuit protection. If a short is detected on the TS_BIAS pin, the switch is disabled to disconnect the short from REGN. If this condition occurs, TS_STAT register is set to 0x3. Charging and OTG modes are suspended until the short is removed.

    Thanks,

    Ning