Hi,
I am using the BQ25710 for a 2S battery powered application. VBUS comes from a Type-C power delivery adaptor, so that is why I chose the BQ25710, cause the input voltage can range from 5VDC to 20VDC.
I am testing the design in my custom board and I am having an issue with the regulated Vsys. The scenario is as follows:
- No battery plugged.
- VBUS=5VDC
- CELL_BATPRESZ configured to 45% of VDDA
- No host controlling.
Under this scenario, I was expecting Vsys to be regulated at 8.4VDC (2S), but instead I am getting 0.844VDC.
I checked the voltage at VDDA and it is not 6VDC, it is 4.39VDC. Still, the voltage at CELL_BATPRESZ pin is 1.98VDC (expected 45% of VDDA).
Could you provide any clue about what could be the issue?
Thank you very much in advanced.