BQ78Z100: Quiescent current

Hello Alex,

This question has been assigned and will be reviewed when possible.

Thank you,
Alan

Okay

Hi Alex,

The datasheet do not include quiescent current specifications for I2C vs HDQ. Power consumption should be nearly identical for both. 

How has customer got to this conclusion? Have you checked that both devices are in same state? (e.g, both states have FETs ON or OFF)

The DS shows a 40uA current difference when one FET is ON and the other is OFF. 

Yes, the test condition is identical since it was on same PCBA with same MOSFET setting. The circuit was in I2C mode by default. Then they set it to HDQ. The quiescent was initially same as it was in I2C. After power cycle the PCBA, the quiescent current increased by 40uA. In other word, the quiescent of both mode are same if there is not power cycling after set it from I2C to HDQ mode. The power cycling of the PCBA seems have impact on how the circuit works

Hello Alex,

Thanks for the update. We won't close the thread and reviewing your question.

Thank you,
Alan

Hello Alex,

Please share a BQStudio log before and after power cycling PCBA. 

Sure. Since our China factory is closed for the holiday. I will provide you the file later next week.