BQ769142: Charge FET disabled during CUV

Seth Kantz

Part Number: BQ769142
Other Parts Discussed in Thread: BQSTUDIO

Tool/software:

When testing a battery pack the system is unable to charge whenever the CUV threshold is set.

When the CUV protection is triggered, the discharge fet correctly gets disabled, but the system is unable to charge because the chg fet is also disabled.

The board status is shown below.

over 1 year ago

0 Alexis_H over 1 year ago

TI__Mastermind 19015 points

Hello Seth,

Thank you for sharing an image of your bqStudio during the fault. Do you mind sharing your .gg file and checking what PF is enabled as well? Also, was the CHG FET enabled already before the CUV fault?

Best Regards,
Alexis

0 Seth Kantz over 1 year ago in reply to Alexis_H

Prodigy 40 points

The CHG FET was enabled during discharge, prior to the CUV occurring. Attaching the .gg file below.

10 31 BQ image after prog.gg.csv

+1 Seth Kantz over 1 year ago in reply to Seth Kantz

Prodigy 40 points

I realized the pack was sleeping and I did not set FET Options -> Sleep CHG, preventing charge from flowing in sleep state.

Thanks!

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BQ769142: Charge FET disabled during CUV