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How can we replace the relay in a battery charger by one or two MOSFETs?


HolyHathaway

My question : how can we replace the relay in a battery charger by one or two MOSFETs? I imagine a P MOSFET mounted as a polarity protection and directly charging the battery through a schottky, and the voltage of the battery sensed by a BJT thru a voltage divider that will block the MOSFET as the battery reaches 14 volts or so. What would be the values of the components : transistor (N? P?), voltage divider... Can you explain on that?

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