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BQ25504: BQ25504 simulation consult

Part Number: BQ25504

I want to know the VSTOR voltage with battery connected and PV disconnected through simulation.

The main configuration:
1.UV=2.2V, OV=3.1V
2.VBAT_OK is high above 2.8V and low below 2.4V
3.The load is 10kR
4.There are a N-ch + P-ch MOSFET(EM6M2) between VSTOR and VBAT_OK

The simulation result shows that the VBAT_OK become low with VBAT below 1.3V, which is abnormal?