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TPS2121: Output is dipping and then system is getting Reset/OFF when switching from Main power to Battery Power

Part Number: TPS2121

Hi,

We are using TPS2121 for switching Main power and the Battery Power. Attached the circuit below for your reference.
Observed the the system is getting Reset/OFF during the Power switching from IN1 to IN2.

Tried with different the CSS values (100nF, 1uF & 10uF), but the behavior wise no change.

Tried removing the OV1 & OV2 voltage divider sections.

Also tried by changing the values R140 - 16.2K, R137 - 2K, R143 - 4.7K, R136 - 15K, but issue was still there.

Main power (12V)

Battery Power (6.9V to 8.4V)

Load current Max: 1.89A.

Please suggest what are we missing.

Regards,

Mahesh