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Original question:

BQ24192: BQ24192 default register settings and Charging functionality when battery is fully discharged

BQ24192: BQ24192 default register settings and autonomous mode understanding

Saumil Shah60
Intellectual 505 points
Part Number: BQ24192

Hi Ning,

I have tricky questions on this Watchdog functionality.

1. We are successfully able to run the charging cycle by Host and for that, we are using the Watchdog Timer disable functionality and we are selecting the Charging current by our Own.

2. We have created Some Voltage loops in that we are reading the Voltage from Fuel gauge and we are deciding on the charging current for the Battery charger.

3. For 2.8V to 3.2V, we are supplying the 140mA current for charging.

4. We have one Power ON/OFF button as well that can turn off the Host but battery can still remain present and connected with the Battery Charger.

5. Now, my query is that if the Charger is in 140mA charging current state and we are disabling the Watchdog timer also and if the user has turned off the host via Power ON/OFF button, then Charger may remain present in this 140mA state only or is there any way such that charger may start functioning with the fast charge current as well automatically?

Thanks

Saumil

  • 0
    TI__Guru 57481 points

    Saumil,

    As long as VBUS stays above VVBUS_UVLOZ or VBAT stays above VBAT_UVLOZ, and watchdog timer is disabled, charge current settings for fast charge and precharge should not change if the host is turned off.

    Thanks,

    Ning.