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BQ25100: Coin Rechargable Lithium Batteries

Jose Manuel Vidal Rico15
Intellectual 526 points
Part Number: BQ25100
Other Parts Discussed in Thread: BQ24105

Hello,

I want to charge a ML1220 coin cell battery but to be honest I am not sure if TI chipset can solve this issue...

TI chipset use 4.2V to charge lithium batteries and also minumun current charge is upper than 10mA and seems to be that coin rechargable lithium batteries needs voltage below of 3.3V to charge and less than 1mA according to this datasshets.

CHARGING

OVERVIEW

In both cases, charger is over low current constant charge method...so, TI chipset offer a solution to implement that or do you suggest to use this simple circuits?

Thanks in advance.

  • 0
    TI__Mastermind 22210 points

    Hi Jose,

    You can take a look at the BQ24105 (battery voltage can be set to 3.3V) but as you've said, it may not suit a charge current that needs to be in the 1mA range. 

    The recommendation is to use what is designed for the coin cell battery but it is in your best interest to make the decision.