Other Parts Discussed in Thread: BQ76920, ,
The customer design with BQ78350+BQ76920. They used BQ76920+BQ78350 with five 18650 batteries in series. When the battery pack is connected to the main board, it is easy to burn out the MCU under the condition of output protection. At this time, they monitored the temperature on the resistance at the SMB line of the BQ76920+BQ78350 battery management board , and found that the temperature kept rising, This indicates that the current on the SMB line is very high. What is the cause of this?
Attached the schematic for your reference.
where P2 interface is the interface with the battery pack, and the GND of P2 is disable.
Waiting for your reply.