BQ27Z561-R2: Whether to support direct use without calibration

chunxiao.liu

Part Number: BQ27Z561-R2
Other Parts Discussed in Thread: BQ27621-G1

I am looking for a 3.7V single cell Li-ion battery power meter chip, is there a model that does not require calibration of the battery before use, as our products are matched with batteries by the customers themselves.

over 1 year ago

0 Shirish over 1 year ago

TI__Guru 57697 points

It looks like by "calibration", you mean characterization and matching chemistry + running learning cycle. For good accuracy these steps are critical

0 chunxiao.liu over 1 year ago in reply to Shirish

Prodigy 10 points

I have seen some chip features mentioned in the "No Full-to-Empty Battery Relearning Necessary", such as MAX17043, TI whether there is such a power meter it.MAX17043 is too expensive!

0 Shirish over 1 year ago in reply to chunxiao.liu

TI__Guru 57697 points

A similar gauge is BQ27621-G1 which does not use a sense resistor. However the accuracy of such gauges is very low compared to the BQ27Z561-R2

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BQ27Z561-R2: Whether to support direct use without calibration