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Charger IC selection

Feng bin Su
Expert 7820 points
Other Parts Discussed in Thread: BQ21061, TLV810E

Hi team,         

My customer are developing a tracker with 3.7V Li-Battery and they need a charge IC with power path function,.

and they hope the IC has discharge  threshold of battery voltage(EX.3.5V...) such as overdischarge protection function. 

Do you have suggestion solution for it? 

  • 0
    TI__Guru** 102885 points

    Hello Feng,

    I am going to direct your question to the chargers team.

    Sincerely,

    Wyatt Keller

  • 0
    TI__Guru*** 146755 points

    Hi Feng,

    None of our chargers have over-discharge protection above ~2.5V.  That is a feature for the pack protector IC.  If you can provide the input voltage and current and the battery voltage and capacity, I can recommend a the appropriate path charger.

    Regards,

    Jeff

  • 0 in reply to Jeff F
    TI__Expert 7820 points

    Hi Jeff,

    Thank for your help. 

    Customer spec is as below.

    input voltage :5V，battery voltage ,TYP 3.7V，MAX4.2V ， capacity 300mAh.

    Originally, they choose BQ21061 and it seems that they faced some overdischarge issue  so they would like to check whether  Vbat UVLO can be programmable IC achieve higher . 3.2V is their target. 

    Sorry, I didn't find the filter about it at ti.com.  

  • 0 in reply to Feng bin Su
    TI__Guru*** 146755 points

    Hi Feng,

    I am not aware of any charger that allows the user to set the VBATUVLO.  The expectation is for the protector to provide that function.  Does the battery not have a protector?  We do not recommend using our chargers to charge bare cells.  If your customer does not want to use a protector, then perhaps they can add series back to back PFETs driven by a supervisor like TLV810E.

    Regards,

    Jeff