BQ25125: Questions for developement support for a mobile bluetooth based sensor device

Thomas Hülsmann

Part Number: BQ25125
Other Parts Discussed in Thread: BQ25122, EV2400, BQ25120F3A, BQSTUDIO, BQ21061, BQ25155, BQ27Z561-R2

Dear TI power management forum,

I'm planning to use the BQ25125 for a new design of a mobile bluetooth based sensor device. So I have some questions, before I start:

1.) Can I use the bq25210 or bq25122 for testing, or do you recommend a different solution?

2.) Do I need the EV2400 Interface Board in general for fully testing the chip?

3.) Is there C source code available, which I can use for my controller-firmware?

4.) I'm planning to use a LIR 2477 Lithium 180 mAh 3.6V accu as the power source. Is the BQ25125 the right device for charging the accu?

4.) Do you have any additional informations or hints, which makes the developement easier?

Thanks in advance

With my best regards

Thomas Hülsmann

over 4 years ago

0 Nick Brylski over 4 years ago

TI__Mastermind 19195 points

Hello Thomas,

We also have the bq25120f3a, section 6 of d/s has a most update to date comparison table comparing all the devices in this family: www.ti.com/.../bq25120f3a.pdf
Yes, recommend also getting an ev2400 to go along with the EVM. This is used to connect to bqstudio and speed up development time.
We have example code available here from the setup guide tool: https://www.ti.com/lit/zip/sluray9
Yes, you may also consider bq25155 or bq21061, these are similar devices without the integrated buck converter.
Take a look at the setup guide tool I linked in (3)

Best regards,

Nick

0 Thomas Hülsmann over 4 years ago in reply to Nick Brylski

Prodigy 10 points

Hi Nick,

thanks for your quick response, which was very helpfull. It's shopping time now!

An additional question: What is the right fuel gauge recommended as the counterpart of the described solutions? And is it supported in the same way, i.e. source code wise?

Best regards

Thomas

0 Nick Brylski over 4 years ago in reply to Thomas Hülsmann

TI__Mastermind 19195 points

Hello Thomas,

For fuel gauge you can check out bq27421 or bq27z561-r2 but any gauge for 1s li-ion will be compatible with this charger.

Some of the gauges are supported in linux, source code is available here: www.ti.com/.../BQ27XXXSW-LINUX

Best regards,

Nick

0 Thomas Hülsmann over 4 years ago in reply to Nick Brylski

Prodigy 10 points

Hello Nick,

thanks again!

Best regards,

Thomas

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BQ25125: Questions for developement support for a mobile bluetooth based sensor device