pow-wow-wow
Newbie level 6
Hi guys,
I am working on a design with two (continuous) power supply : 12V from external supply and 12V from a battery.
I was thinking about protecting each power supply using a NMOS wired as a diode, in order to reduce current consumption. I have heard of this solution, but never tested it.
I already have BSC028N06NS in my design so I would like to use them.
In case there is a failure in power supply, the battery will then be the only supply. Then the design will be :
I have two questions :
- Is it possible to reproduce the NMOS-Diode behaviour in LTSpice? In the design above, this does not seem to work. I will like to be sure this design is working, as I have never tested it before.
- In this case, how can I calculate/simulate the current consumption of the NMOS transaistor. Shall it be evalute from the value of Rds(on) ?
Regards,
I am working on a design with two (continuous) power supply : 12V from external supply and 12V from a battery.
I was thinking about protecting each power supply using a NMOS wired as a diode, in order to reduce current consumption. I have heard of this solution, but never tested it.
I already have BSC028N06NS in my design so I would like to use them.
In case there is a failure in power supply, the battery will then be the only supply. Then the design will be :
I have two questions :
- Is it possible to reproduce the NMOS-Diode behaviour in LTSpice? In the design above, this does not seem to work. I will like to be sure this design is working, as I have never tested it before.
- In this case, how can I calculate/simulate the current consumption of the NMOS transaistor. Shall it be evalute from the value of Rds(on) ?
Regards,