BQ27441-G1: Gas gauge operation with 1s2p battery pack

Hi David,

Can you provide a little more details on your application? Is the batttery gonna be embedded or is it detachable. Why did you decide on the bq27441? The device can support 1s2p without any issues. You just need the right configurations of the data memory notably, design capacity of the pack which will be  2x design cap of 1 battery. You need to use our online tool gpcchem to determine if the bq27441 would work for your application given it has hardcoded limitedchem ids. You may also need to perform a learning cycle as well following the attached app note.

2376.LearningCycleOverview_bq274xx.pdf

thanks

Onyx

Hi Onyx. Thank you for your quick reply.

The battery pack will be soldered to the main PCB via leads and is not intended to be user-replaceable.

I have a variety of previous designs as reference and one of them was configured to manage a single-cell battery using the BQ24075/BQ27441 as shown. I was going to reuse this design if it will work. However, I'm open to more appropriate options if you know of any.

The battery pack used is defined and cannot change. But I can change the charging/management circuit to whatever is best based on the following requirements:

- Allow for simultaneous operation/charging from the uUSB connector
- Allow for 3V regulated output @ 1A
- Provide battery charge status (via i2c) to a local processor

Thanks,
David

Hi David,

Thanks for the additional details. Your gauge requirements are pretty much generic but the key to determining if the bq27441 would be a good match is to perform the test i made mention of using your battery pack.

A more suitable gauge that will allow you program any chem id would be the bq27750. It is our latest and greatest single cell guage. The bq27542 will also allow you program your chem id as well

thanks
Onyx