BQ78350: How to resolve the current offset?

user5811580

Intellectual 700 points

Part Number: BQ78350
Other Parts Discussed in Thread: BQSTUDIO, BQ76920, BQ76930

As you know, the actual resistor is bigger than the sensor resistor.

The sensor resistor value is 0.001 and the actual value is bigger than 0.001 because of the resistor of PCB.

Therefore, the charging current is 2690mA in bqStudio.

However, the actual charging current is 1000mA.

Is there any way to resolve the current offset?

over 6 years ago

0 Matt Sunna over 6 years ago

TI__Guru* 81034 points

Hi Wu,

Have you run the calibration steps on the device in the system? This is very important to ensure accurate voltage and current measurements. If you are using bqStudio, these steps are available in the Calibration tab. The EVM User's guide for the bq76920 and bq76930/940 (depending on which EVM you have) explains how to do the calibration.

Best regards,
Matt

0 user5811580 over 6 years ago in reply to Matt Sunna

Intellectual 700 points

OK.
I'll have a try.

0 user5811580 over 6 years ago in reply to Matt Sunna

Intellectual 700 points

Thank you very much.
This has solved my question.

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BQ78350: How to resolve the current offset?