BQ27742-G1: SOC drops from 91% to 0% and FCC updated to 65535 when discharging

Statham Su

Genius 4840 points

Part Number: BQ27742-G1

Hello Sir:

We have issues when discharging.

Please refer our log file, the abnormal parameters shows in the 14536 list.

Do you have idea why the SOC drops to 0%?

And why the FCC update to 65535?

Please kindly provide your recommendations for us.

Thanks a lot.

FW learning and data update Version-Dsg cycle 01 (20221028).log.xlsx

over 1 year ago

0 Dominik Hartl11 over 1 year ago

TI__Guru 51346 points

Please provide the configuration file for the gauge.

0 Statham Su over 1 year ago in reply to Dominik Hartl11

Genius 4840 points

Hi Dominik:

Please refer below file.

Thanks a lot.

SP300B gg (20221031).gg.csv

0 Dominik Hartl11 over 1 year ago in reply to Statham Su

TI__Guru 51346 points

The problem is that you set the sleep current to 15mA but the Quit Current threshold is 3mA. This can cause the gauge to enter sleep mode while it's in discharge state, which is not allowed. Please either disable sleep mode or set the sleep current to 2mA.

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BQ27742-G1: SOC drops from 91% to 0% and FCC updated to 65535 when discharging