Replace Schottky with Mosfet

Vindhyachal Takniki

Joined Nov 3, 2014
567
1. I have a application in which I have schottky connected at input. At input a solar panel is connected & at output battery is connected along with charge controller. Schottky serves two purposes; one is protect the circuit in case reverse connection of panel are connected & second prevents reverse flow of current from battery to solar panel known as dark current.

2. Max current from panel is 10A, so I have connected two parallel schottky PDS1040. Datasheet of PDs1040 state max Vf drop of diode around 0.55V at 10A(wrost case Tj=-65) & 0.52V at 5A.
Max panel voltage goes to around 21V.

3. These two diodes gets heat up very quickly & I want to replace them with Mosfet. Now I was looking for how I can replace it with Mosfet.

ak

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crutschow

Joined Mar 14, 2008
25,991

crutschow

Joined Mar 14, 2008
25,991
I want reverse polarity protection fro solar panel only & reverse current going into panel.
Currently I have decided that I will place three PDS1040 in parallel & large coper pads with vias on it on PCB for 10A current & will see the result.

Since ideal diode from linear is around \$5.
You do understand that, as I noted in post #18, a series diode will not protect against reverse polarity.