Tool/software:
Hi Tier
Could I use BQstudio to increase the charger current? How to do it.
And my customer found, EVM can use at 19V input, but when we change to 18.1 V, EVM not working.
Is there some protection ？
Hi Yuxi,
Could I use BQstudio to increase the charger current? How to do it.
To increase the battery charge current, go to the 16 Bit Registers tab and change the current directly from the drop down menu:
And my customer found, EVM can use at 19V input, but when we change to 18.1 V, EVM not working.
This sounds like the device is in VINDPM. At POR, the charger reads VBUS without any load current and sets the VINDPM threshold. If VBUS falls below this threshold, then the converter will reduce input current in an attempt to hold up VBUS. If this occurs, it should be indicated by the VINDPM_STAT and should set VINDPM_FLAG.
To resolve this, the VINDPM register can be changed:
More info on VINDPM can be found in the BQ25798 datasheet “9.3.4.4 Default VINDPM Setting”
Regards,
Jared Baxter
