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BQ40Z50: BQ40Z50 R3: Abnormally Charge Rate

Abhijith Prabha
Prodigy 245 points
Part Number: BQ40Z50

Hi,

in my system based on BQ40Z50, after a few charge-discharge cycles the charge rate increases exponentially and finally its stuck at 100%. 

Scenario explanation:

1. battery connected to host and starts charging.

2. battery charges at normal rate. 

3. now change the RSoC to different value and again allow to charge

4. repeat the step 3 with arbitrary values

Observation: with each iteration the charge rate increases and after a few iterations it stays at 100% and not change or stuck.

What would be the possible reason for this?

regards

Abhijith

  • 0
    TI__Mastermind 27321 points

    Hello Abhijith,

    The RSOC is a read-only value. What do you mean by step 3? 

    Can you please send a log file which describes this behavior? I am not fully understanding what charge rate increases after a few iterations.

    The gauge will report charging current and charging voltage, but it will only apply these current and voltage if the host is writing this info to the charger. 

    Regards,
    Jose Couso