Hello TI support team ,
I wanted to know if the BQ34Z100EVM can support a Li-Ion battery of 60V and 6A. I checked the datasheet BQ34Z100EVM and in that it is mentioned 6-48V and 0-7A. but the IC BQ34Z100 can support voltages up to 65V. So would really appreciate the help to figure out if I can use the EVM for my battery
Thanks
Hello Bhanu,
The input of the bat pin is scaled down to a range of 0-0.9V and scaled back up in the firmware. On the EVM, the voltage divider is not set up to support a voltage that high. You should be able to achieve it with some changes to the hardware though.
Use this equation to calculate the top leg of the divider. Currently, the board has 900kΩ for the top leg if you select 48V on the jumper.
However, you should be careful about this. I noticed a few of the FETs connected to BAT have 50V max VDS ratings, which you would exceed here. The board wasn't designed with 60V in mind so it may cause some unexpected issues. I would recommend checking every leg connected to BAT to be sure the ratings of the parts won't be exceeded. There is a possibility the board could be damaged if you aren't careful.
To summarize, while the IC can handle that voltage, the EVM is not designed for it. While you could heavily modify the EVM to make it work, that is at your own risk. So, I would recommend against it.
Thanks,
Alex M.
