BQ51050B: Possible to use it for low current applications

Kilian Lenz1

Part Number: BQ51050B
Other Parts Discussed in Thread: BQ25100, BQ51003, TIDA-00318,

Dear TI-Experts,

the application the BQ51050B should be used in is a little BLE device with a 60 mAh Li-Ion battery. The maximum loading current is 60 mA during fast charge mode and 30 mA during standard charge. We choose the BQ51050B to safe an external bq25100 linear charger IC as introduced with the bq51003 IC in the TIDA-00318 application.

What I need to know if the BQ51050B is capable to charge the battery with only 30 mA or is the limit form the data sheet of 500 mA really the lowes possible value?

Thanks a lot!

over 4 years ago

0 Kilian Lenz1 over 4 years ago

Prodigy 30 points

A second question would be if there are any recommendations for an cheap Rx coil for such a low charging current?

0 Bill Johns over 4 years ago in reply to Kilian Lenz1

TI__Guru 69601 points

Hello

The BQ51050B will not work well at 60mA and 30mA charge currents, charge accuracy is low at this point. Recommend the TIDA-00318 solution for this application.

For coil take a look at TDK WRWR222230-26M8-G

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BQ51050B: Possible to use it for low current applications