Ideal diode MOSFET circuit

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Barkuti
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Ideal diode MOSFET circuit

Having read A simple and inexpensive ideal-diode MOSFET circuit @ Power Electronic Tips, decided to draw its N-channel counterpart. See images below for comparison. Since I have no formal electronics education, this is to ask the experts if this is right and what are its practical limitations:

 

 

Speaking of low nominal voltage cells I guess a low VGS MOSFET is preferred if used to prevent battery or charger reverse current, isn't it?

 

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Edited by: Barkuti on 02/01/2019 - 02:28