For the sake of saving space and not having to go to the higher cell chip I wanted to see if I could run this chip with 6 cells for just voltage monitoring. My intent was to remove any power that is being delivered to the chip on pin 9 & 10. And use an external power supply to power up this chip. From there be able to do some some simple math to calculate the last cell that is not plugged in.
If you look at the EVM data sheet figure 26 page 36. I removed R14, R3 & D2. I placed a 18V at pin 9 & 10. However, the chip wouldn't power up. I was getting zero current draw and the external LDO from the chip was reading at 0V.
My question is, should be able to power this chip even though the C5 voltage will differ from the BAT voltage? Perhaps I wired it up wrong and that is why I couldn't turn it on? what should my configuration for the Switches on S3 be?