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BQ28Z620: BQ28Z620, when pack is rest, and set deadband current=3mA, GG current reading still is -1mA, that is no load current in picture

Peng

Prodigy 30 points

Part Number: BQ28Z620
Other Parts Discussed in Thread: BQSTUDIO

Tool/software:

BQ28Z620, when pack is rest, and set deadband current=3mA, GG current reading still is -1mA, that is "no load current" in picture, using FW100 version, if it has a bug? what is the problem, and I found this PACK's max error is huge, is it a related issue?

0 Jonny 7 months ago

TI__Mastermind 24741 points

Hello,

Please ensure that you have successfully performed the current calibration.

Regards,

Jonny.

0 Peng 7 months ago in reply to Jonny

Prodigy 30 points

Can you tell me the right current calibration? I use TI GUI and BQstudio to calibrate and it showed successfully calibration.

0 Jonny 7 months ago in reply to Peng

TI__Mastermind 24741 points

Hello,

For current calibration, you can follow the process outlined in the BQ28Z620 EVM user's guide below.

Regards,

Jonny.

0 Peng 6 months ago in reply to Jonny

Prodigy 30 points

Hi Jonny, I am sure that I have followed this current calibration steps you presented.

0 Jonny 6 months ago in reply to Peng

TI__Mastermind 24741 points

Hello,

This is odd to me, could you download the latest FW from ti.com and program this onto your gauge and see if you are still having this behavior?

Regards,

Jonny.