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BQ25122: BQ25122 setting issue and check

Ray Chang
Intellectual 1345 points
Part Number: BQ25122

Hi, Team 

Would you help to check the BQ52122 setting as below:

1.What is default DC/DC output voltage for BQ25122?

2.Could we get temperature information from BQ25122? (read real temperature from external NTC by I2C)

  • 0
    TI__Genius 12475 points

    Ray,

    1. The default output voltage is 1.2V for the VSYS. 

    2. The BQ25122 indicates faults only. It doesn't have an ADC built it but whenever the TS pin voltage is within thresholds of COLD or COOL or WARM or HOT, you will recieve a fault and the register will update accordingly. 

    thanks,

    Gautham

    Battery Charger Applications

  • 0 in reply to Gautham
    TI__Intellectual 1345 points
    Hi, Gautham

    One more question, due to customer's PCB is limited,
    If we do not use below pins, how to deal with it? could we floating it?
    LS/LDO, PMID, nMR, nReset, nLSCTRL and TS.
  • 0 in reply to Ray Chang
    TI__Genius 12475 points

    Ray,

    PMID will need the capacitor min as recommended by the datasheet. 

    LS/LDO is okay to float if not using. 

    /MR is okay to float as pulled up 

    LSCTRL is okay to float as pulled down internal

    TS is not okay to float. I would recommend a resistor divider with a 60% of VIN. 

    Regards,

    Gautham