I am using the EVM for BQ3060, and the top cell balance mosfet is partly switched on all the time. The gate-source voltage is 1V, and it continues to draw just over 20mA at all times, charging, discharging, with no load connected and the pres line switched off. Is the chip likely to be damaged or is ther something in the flash settings that can cause this problem?
At first I followed the setup instructions in the EVM data sheet. I connected 4 cells as shown in the instructions, and installed the software to communicate with the EVM on an old laptop computer. (The solftware appears not to work on Windows 10, it just gives runtime error 6. Is that correct?) Could that have caused damage? Is it necessary to have set the BQ3060 for 4 cells before connecting them?
AFter trying to recalibrate for 4 cells, I eventually found a link to another document where I learned that it is necessary to change one bit in a flash location to set the BQ3060 for 4 cells, so I did that. Then I calibrated the cell voltage measurements, and it seems to measure correctly. However, the top cell is always being discharged at just over 20mA no matter how much lower its voltage is than the other 3 cells. I am still in the early part of the learning curve, and have not yet found a full explanation of how the cell balance works
Thanks for any advice anyone can give.
Andrew