This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS22996: Battery connected to BQ2562X via load switch

Part Number: TPS22996
Other Parts Discussed in Thread: TPS22991, TPS22995, BQ2970

Tool/software:

For a battery charger based on the BQ2562X, where a battery "pack" is inserted into the charger by the user, and the user must press a button to begin charging: when the button is pressed, I am considering using a load switch to connect the battery to the BQ2562X. Candidates are TPS22991, TPS22995, TPS22996.

My question is if these load switches will be transparent enough to the BQ2562X to allow it to operate as intended, or if having the battery connected to the BQ2562X via load switch would interfere with the operation of the BQ2562X.

  • Hello Nicholas,

    Sorry for the delay in response.

    Where do you intent to use the load switch?  Before BQ2562X or after?

    Usually load switches are connected at the load end.

    You can achieve the same functionality by connecting load switch after BQ2562X.

    Thanks 

    Amrit 

  • Hi Amrit. I am intending to use the load switch between the battery positive terminal and the BAT pin of the BQ2562X. This is so I can disconnect/connect the battery after a delay when the battery pack is inserted into the charger (to prevent the BQ2562X from being damaged by battery insertion). If a load switch is used in this way (between the BQ2562X and the battery), will it interfere with charging?

  • Hello Nicholas,

    I don't see any issue with this configuration.

    Do you need any additional protection (reverse polarity,current limit,OVP etc) ?

    Thanks 

    Amrit 

  • Thank you Amrit, it is good to know that using a load switch in this way should be possible.
    I'm planning for other protections that you mention to be on the pack-side, provided by BQ2970.

  • Please close the thread if it answers your query