Hello guys,
One of my customers is evaluating BQ25731 for their new products.
In the evaluation, they faced the following IADPT phenomenon and they want to know what the reason is.
Could you please give me your reply?
[IADPT phenomenon]
They use ChargerOption EN_LWPWR to enter and exit low power mode.
The controller also sleeps while BQ25731 is in low power mode.
When exiting sleep mode, the controller sets EN_LWPWR=0 and set OTG voltage to 3V at the same time.
After this, 1.8V is output on the IADPT pin for approximately 20ms.
At this time, the voltage between ACP and ACN was 0V. So they don't think the IADPT voltage will come out, but about 1.8V will come out.
Could you please tell me the cause?
The register value is as follows.
Resistor name Address data
ChargeOption0 01/00h 0110 0011 0001 1011
OTGVoltage 07/06h 0000 0101 1101 1100
OTGCurrent 09/08h 0010 1000 0000 0000
ChargeOption1 31/30h 1011 0011 0000 0000
ChargeOption3 35/34h 0001 0100 0011 0100
Your reply would be much appreciated.
Best regards,
Kazuya.
