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BQ40Z50: 0

Part Number: BQ40Z50
Other Parts Discussed in Thread: EV2400

1.When calibrating the voltage of the defective product, there is always a certain difference between cell 1 and other cells, like picture 1;

2.The current is -200mA when there is no load, then perform 2A load operation and calibrate the current(like picture 2), the current becomes -900mA when no load, like picture 3;

3.Exchange the IC and parts of periphery circuit with good sample, the issue still exists;

Please help to check what may be problem, thanks!

  picture 3

 

  • Hello Huiyi,

    It looks like there may be something wrong with your communication, you can see on the left side the "FFFFF_FFFFF..." should actually report the bqz being used. Are you using the SMB connection on the EV2400? Does the gauge auto detect or do you manually select the bqz?

    Sincerely,

    Wyatt Keller