Other Parts Discussed in Thread: EV2400, BQ24770
I’m close to turning on my experimental setup. But before I do, I had some questions.
I’m using the bq24770EVM and the bq40z50EVM in an NVDC charger + gauge setup. The attached diagram shows how I plan to hook it all up, based on what I read in the two EVM user guides. My questions are as follows.
1.) If I need to use a second 3.3V power supply for the bq24770EVM, which I assume is the pull-up voltage for the SMBUS, should I wire this same 3.3V to J2 of the bq40z50EVM (which would normally be where VOUT1 from the EV2400 comes in)? Please see the dashed orange connection in the diagram.
2.) Why doesn’t the bq24770EVM have the same 4-pin header for its SMBUS input as the cable to the EV2400 suggests?
Please let me know. Also, please confirm that this hook-up is correct and ready to power up and test.
Thanks,