• State
  • Locked Locked
  • Replies 1 reply
  • Subscribers 63 subscribers
  • Views 106 views
  • Users 0 members are here
Support feedback
Options
Options
Related

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.

TPS25948: Charging Over votlage

Douglas Ross
Prodigy 105 points
Part Number: TPS25948
Other Parts Discussed in Thread: BQ24196,

Tool/software:

Good day, 

We have a circuit board using the BQ24196 charger. We provide a 12V input and charge a single cell Li-ion battery. 

As part of the safety tests, the input of the charger is shorted with the output of the charger. 

When this happens our battery fails as it still charges. It seems that the built in PCM isnt working as should. 

We already have one TPS259482AYWPR on our board and thought it would be good to use it as an over voltage protection. 

Would the below circuit work ot have an over voltage of about 4.4V? The efuse power is connected directly to the charger, which when shorted will provide 12V

I've looked at some of your battery protection IC's but the highest input voltage I could get was 12V max, which is cutting it close. 

Do you maybe have another suggestion if this wont work?

Regards

Douglas

  • 0
    TI__Mastermind 39015 points

    Hi Douglas,

    Apologies for delayed response.

    Douglas Ross said:

    We already have one TPS259482AYWPR on our board and thought it would be good to use it as an over voltage protection. 

    Would the below circuit work ot have an over voltage of about 4.4V? The efuse power is connected directly to the charger, which when shorted will provide 12V

    Yes, TPS25948 can be used for OVP. Yes, below mentioned setting should set OVLO to 4.4V. 

    Douglas Ross said:
    When this happens our battery fails as it still charges. It seems that the built in PCM isnt working as should. 

    When you say PCM isn't working, do you mean by eFuse or BQ chip or some external circuitry you have on the board. 

    Best Regards,
    Arush