When the protection board is normal, Vdd is high level, Vss and VM are low level, DO and CO are high level. When any of the parameters in Vdd, Vss, VM change, the level of DO or CO will change.

1、Overcharge detection voltage: In normal state, Vdd gradually rises to the voltage between VDD and VSS when CO terminal changes from high level to low level.

2、Overcharge release voltage: In the charging state, when the CO terminal changes from low to high, Vdd gradually decreases to the voltage between VDD and VSS.

3、Over discharge detection voltage: In the normal state, when the DO terminal changes from high level to low level, Vdd gradually decreases to the voltage between VDD and VSS.

4、Over-discharge release voltage: In the over-discharge state, when the DO terminal changes from low to high, Vdd gradually rises to the voltage between VDD and VSS.

5、Overcurrent 1 detection voltage: In the normal state, when DO goes from high to low, VM gradually rises to the voltage between VM and VSS.

6、Overcurrent 2 detection voltage: Under normal condition, when DO terminal changes from high level to low level, VM rises from OV to the voltage between VM and VSS at a rate of more than 1ms and less than 4ms.

7, load short-circuit detection voltage: Under normal condition, when the DO terminal changes from high to low, VM rises from OV to the voltage between VM and VSS at a rate of more than 1μS and less than 50μS.

8、Charger detection voltage: In the over-discharge state, VM gradually decreases to OV and VM-VSS voltage changes from low level to high level.

9、Current consumption during normal operation: In the normal state, the current flowing through the VDD terminal (IDD) is the current consumption during normal operation.

10、Over-discharge current consumption: In the discharged state, the current flowing through the VDD terminal (IDD) is the over-current discharge current consumption.