Tool/software:
Hello, I am using the BQ76907RGRR in my design. The design is very similar to the dev kit. I have a resistor network set up as well, similar to the dev kit in order to simulate battery cells. I am able to power the board with a power supply hooked up to PACK+ and BAT- at 22V, and I can see the device via I2C. REGOUT is also 3.3V. But when I attach a large battery pack to the setup the IC seems to fail and I can no longer see the device on I2C. The configuration of the battery pack is 6s7p (22.2V). REGOUT is also close to 0V. When I switch back to a power supply, I am still unable to see the device on I2C and REGOUT is still near 0V. I suspect connecting the battery damaged the board due to inrush current. I have measure the inrush current on battery attach. The image is shown below. I measured the voltage across a 10ohm power resistor in series and yielded a peak of 17.4V. So the inrush current is about 1.74A. I can't find much information on inrush current in the datasheet, but do you think that this is enough to damage the chip? I have more boards on hand, but I don't want to risk damaging any more of them. Let me know if there's anything else I can try as well. Thanks!
