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BQ25618: BQ25618 Questions

Gust Zhang
Expert 5811 points
Part Number: BQ25618

Hi Team,

My customer has a project that needs to verify BQ25618 before the Spring Festival, and now I have some questions I want to consult.

1. I2C Watchdog

Confirm: If watchdog is set to non-zero, set WD_RST to 1 within the timeout period, otherwise it will trigger watchdog reset

2.BATFET_RST system reset and REG_RST register reset

Can you explain about these two modes? How to use them? What are the usage scenarios of the two?

BR

Gust

  • 0
    TI__Genius 10385 points

    Gust,

    I2C Watchdog Behaviour:

    Once the device enters Host Mode (it has been configured via I2C) the watchdog timer begins. To retain host mode, the host must set WD_RST to 1 before the timer expires.

    BATFET_RST system reset:

    This is described in full detail in 8.3.7.3 BATFET Full System Reset, but I will provide a high level overview. In this BATFET operational mode (BATFET_RST_EN=1 and BATFET_DIS=0) the /QON pin is used to perform a full system reset. This system reset will cause a full POR even to the downstream power tree.

    REG_RST:

    This will reset the registers to the default register settings immediately and reset the safety timer.

    Best Regards,

    Ricardo

  • 0 in reply to Ricardo
    TI__Expert 5811 points

    Hi Ricardo,

    Thanks for your reply, I have some questions to confirm with you.

    1.Does BQ25618 have an interface to read the id and version information of the chip? How to judge whether the chip is working normally?

    2.Does boost mode supply a reverse power for external equipment? If we do not use this feature, how to disable?

    BR

    Gust

  • 0 in reply to Gust Zhang
    TI__Genius 10385 points

    Gust,

    1.Does BQ25618 have an interface to read the id and version information of the chip? How to judge whether the chip is working normally?

    BQ25618 is an I2C controlled device. Perform an I2C read on register REG0B[6:3] and you should see device ID 0101.

    2.Does boost mode supply a reverse power for external equipment? If we do not use this feature, how to disable?

    Boost operation is effectively running the charger in reverse to create an output voltage supplied by the battery onto the PMID pin. The operation is disabled by default and can be enabled by following the steps in the section You have shown.


    Best Regards,

    Ricardo