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BQ24133: BQ24133 Charging issue

Henry Wang
Intellectual 700 points
Part Number: BQ24133

Hi Sirs,

When our robot system is power on, it drains to much current from the battery (almost 40A, see below diagram). So BQ24133 is short circuit and end latched off.

If we  lower the draining current, we won't find this issue while we don't want to change our HW design now since we are really close to MP.

Does TI have any method can solve this issue except removing adapter then plug again? Thanks!

 

 


 


  • 0
    Intellectual 700 points

    Hi Sirs,

    When our robot system is power on, it drains to much current from the battery (almost 40A, see below diagram). So BQ24133 is short circuit and end latched off.

    If we  lower the draining current, we won't find this issue while we don't want to change our HW design now since we are really close to MP.

    Does TI have any method can solve this issue except removing adapter then plug again? Thanks!

  • 0 in reply to Henry Wang
    TI__Expert 8690 points

    Henry,


    One method would be to control inrush current from the system. When you power on the system, try to control the load switch with an RC filter at gate to source. Another method would be to add more capacitance on the charger side. I don't think this can be fixed without any hardware change.

    Regards,
    Steven