I am working with the L9961 IC for battery management, and I have a question regarding how the charging (CHG) and discharging (DCHG) FETs are turned on or off when faults occur.
From the datasheet, I understand that:
- The FAULTN pin is used to signal fault conditions.
- Specific faults, such as cell undervoltage or overvoltage, cause the IC to disable either the CHG or DCHG outputs.
- The IC can also latch fault conditions, and the FETs can be controlled externally.
My question is:
- When a fault condition occurs, how exactly does the L9961 decide to turn the CHG and DCHG FETs off?
- Are there specific registers or internal logic that determine this behavior, or is this purely based on the FAULTN pin state?
- How can the MCU (or external controller) override or reset these FET states after the fault condition is resolved?
