Switch Ac loads using Mosfet’s (as relay)
We will now see how we can switch AC loads using Mosfet’s transiostors (using mosfet’s as relay)
Two MOSFETs with their source pins connected together will drive AC loads.
An Opto-isolator or logic gates can be used to switch the mosfets on and off, to prevent damaging mosfet’s because we want the mosfets to be full on (saturation region) or full off , if you apply an insuffisant voltage to the gate of the mosfet’s it will function in the linear region and the power dissipation will be splited between the load and the mosfet, which will burn the mosfet at high currents.