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Selecting the right battery charger

John Byers
Prodigy 20 points
Other Parts Discussed in Thread: BQ25101, BQ24278

I need some help selecting the right battery charger. I am attempting to charge a single cell Li ion battery with a 400 mAh capacity that I found online that includes built in over voltage, over current, and under voltage protection. I have been looking around the TI webstore trying to find a suitable  battery charger and have found two possible solutions:

BQ25101 (http://www.ti.com/general/docs/lit/getliterature.tsp?genericPartNumber=bq25101h&fileType=pdf

if the battery already has built in 

protection. The BQ25101 is a linear charger and is much simpler to use but will need an LDO to accompany the battery charger to ensure that the voltage stays at 

an acceptable voltage level. The BQ24278 has a built in switching LDO which is also a nice feature, i'm just not sure if I need to spend the extra time configuring it

if the BQ25101 will essentially do the same thing but not waste time on overly protecting the battery if it isn't necessary.

 

Any suggestions would be appreciated.

  • 0
    TI__Expert 7730 points

    Can you specify what kind of protection that you need but is missing from bq25101?

    Based on your description of the battery capacity, bq25101 seems a better fit. It has built in 30V input voltage rating, 6.8V input over voltage protection and also under voltage protection.

    Do you have other requirements for the charger? For example, package type, size, termination current level, etc.? It will help us recommend the right charger to you.

    Thanks,

    Wenjia