BQ24725A: A Charge Problem

Hello,

Did you disable the watchdog timer? 

Regards,

Joel H

Hi Joel

     Yes, I turned off the watchdog timer. I have tried many configuration methods.

Hi Joel

Yes, I turned off the watchdog, and I have tried many configuration methods to have this phenomenon.

Thanks.

Hello,

Can you capture a single waveform showing the VCC voltage, ACDRV voltage, PHASE node voltage, and trigger on the charge current falling?

And on another single waveform, capture VSRN, ACN, ISYS load and again trigger on the charge current falling edge?

Regards,

Joel H

CH1  VCC

CH2 PAHSE

CH3 ACDRV

CH1 VSRN

CH2 ACN

I don`t know what is ISYS?

Hello, 

For waveform (1), I need you to capture the waveform at a much longer time scale and capture the charge current falling.

We are trying to capture the behavior when the device stops charging, so that event is critical in understanding why the charge current goes to zero.

Please do the same for waveform (2).

You will likely need a current probe or some way of monitoring the battery current on the scope and trigger on the current falling.

Regards,

Joel H

Hello, I found the problem now, not a hardware problem, but the battery actively sent information to the charging chip, which caused the charging chip to stop charging.

Thank you.