Hi guys,
I am working of a power supply. It works nice well, but I have some dought. I used N channel mosfet a series pass element. The gate is driven by a microcontroller via a transistor amplifier for a gain of 3. The amplifier is fed with a 18v via a dc to dc converter. by varying the gate through the mosfet conduct nicely. The mosfet is fed with 25V from a rectifier.
my question is the gate voltage in the datasheet is given with respect to source Vgs, but at full conduction the mosfet source is at around 24V , but by giving around 15V from the amplifier with respect to ground the mosfet conducts pratically , but I am not able to understand it. somebody please explain