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BQ24780S: watchdog Timeout

Big Bill
Expert 1980 points
Part Number: BQ24780S

Dear All:

    

It is now verified that the Hybrid power boost mode will have an action.

Find a relationship with watchdog timeout.

For example, our EC will set ChargeCurrent() to zero when it is full.

This results in a watchdog timeout.

The Hybrid power boost mode is turned off (the above is my conjecture, because it is not certain that the TIME OUT is triggered, there is no place to see if it is triggered)

So just a couple of question as below：.

1. what is the main function of ChargeCurrent() &ChargeVoltage() ?  Is it  to be set only  one time  or consider the actual situation, such as filling up, or the protection of dynamic modulation ChargeVoltage(),ChargeCurrent()

2 . What else does this TIMEOUT want to protect?

To understand the purpose, the set value will meet the purpose of this function.

  • 0
    TI__Guru 56650 points

    Bill,

    1. ChargeCurrent() &ChargeVoltage() is for battery charging current and voltage setting. It can be set only on time or according the gauge or hot charging profile updating the charge current and voltage frequently.  For example: at different temperature, the charging current and voltage could be different.

    2. When watchdog timeout, ChargerCurrent will be reset to zero to stop charging.  It wants to protect the software code error. If customer doesn't need it, the watchdog timer can be disabled.