https://circuitdigest.com/electronic-circuits/power-path-controller-system-using-ltc4412-to-switch-between-primary-and-auxillary

Where did you find jumper wires?

The MOSFET has multiple drain pin output in the footprint that are internally connected inside the MOSFET. I just added all individual drain pins connected for higher rate of current transfer.

Yes .

Yes .

Hi Sourav,
I managed to procure the components and replicate the circuit diagram. However, there was a query:
The circuit automatically switches to Auxiliary power source when Auxiliary voltage is higher than the Primary voltage even when the Primary voltage is present. Can you please tell how we can correct this

This is not a error... This is what supposed to be and this is how power path works.... What is your application? What you want?

Power path works with simple logic. Which ever voltage is higher it will provide the output on that one. There is a reason for it. Suppose you are running a load with 12V power source and have a auxilary power for 12V battery. In this situation the primary fails but the load should be changed to the secondary or auxillary power without turning of the load. Thus, when when the primary power turns off it starts to drop to the 0. During the drop, at the situation the voltage is below the 12V battery, it will switch to the battery and the load would not turn off.

Thus, if you want to power the load in primary, make sure it has slightly above than the auxilarry one. (How much difference is require will be available on the datasheet.)

Got it.. Thanks for the explanation.

Do not forget to use bulk capacitor across the output. Use mosfets instead of diode for low voltage drop. Just few tips in case required.