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BQ24250: bq24250 / Spike noise on Vbus at enter and exit supplement mode

S.Satoshi
Guru 21685 points
Part Number: BQ24250

Hi Team,

I found the spike noise on Vbus at enter and exit supplement mode as attached. This can be seen with default external components by using bq24250 EVM. I also checked input current then it was dropped at the same timing with its spike noise. Then please give your opinion for following question.

  1. Do you think this is expected behavior?
  2. I'd like to know the mechanism why the input current is changed during Iin DPM operated and spike noise is happended.

Best Regards,

Satoshi / Japan Disty