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

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https://circuitdigest.com/electronic-circuits/power-path-controller-system-using-ltc4412-to-switch-between-primary-and-auxillary
August 13, 2020 - 5:11pm

Hi,
I am trying to build this project which was posted by Sourav.
Can anyone tell me what is the meaning of the additional jumper wires put before the drains of respective MOSFETs in the circuit diagram

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Hii
August 14, 2020 - 2:16am

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.

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Hi..
August 14, 2020 - 2:28am

Hi..
I got it now.. So you have shorted them externally as well, right?

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Hi..
August 14, 2020 - 2:28am

Hi..
I got it now.. So you have shorted them externally as well, right?

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Yes
August 14, 2020 - 11:18am

Yes .

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Yes
August 14, 2020 - 11:18am

Yes .

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Regarding functionality
September 13, 2020 - 8:58pm

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

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Hii
September 13, 2020 - 10:23pm

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?

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Hii...
September 14, 2020 - 11:52am

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.)

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Got it.. Thanks for the
September 18, 2020 - 5:07pm

Got it.. Thanks for the explanation.

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Hi
September 18, 2020 - 11:35pm

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.

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Hi
September 19, 2020 - 2:59am

Thanks Sourav for the help.. Using the same P-channel mosfets and also a 2200 mFD capacitor at the o/p

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Hi
September 19, 2020 - 2:59am

Thanks Sourav for the help.. Using the same P-channel mosfets and also a 2200 mFD capacitor at the o/p

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Hi
September 19, 2020 - 2:59am

Thanks Sourav for the help.. Using the same P-channel mosfets and also a 2200 mFD capacitor at the o/p

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Hi
September 19, 2020 - 2:59am

Thanks Sourav for the help.. Using the same P-channel mosfets and also a 2200 mFD capacitor at the o/p

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Hi
September 19, 2020 - 2:59am

Thanks Sourav for the help.. Using the same P-channel mosfets and also a 2200 mFD capacitor at the o/p