P Mosfet High Side Switch

Sometimes you want to keep the same ground reference to your circuits so.

P mosfet high side switch. Because of how transistors work these can be a little more difficult to use in an arduino or raspberry pi circuit. It seems like every time i go to work with mosfets i have to spend. Typically these use a pnp bjt or p channel mosfet. The p channel high side switch therefore solves the problem of using an n channel mosfet for high side switching.

Used as a high side switch a p channel mosfet in a totem pole arrangement with an n channel mosfet will simulate a high current high power cmos complementary mos arrangement. The opposite of the low side switch is the high side switch. In this case use a p channel mosfet to turn the relay on from the arduino s i o pin. Using a p channel with positive voltages is easy when connected to the circuit correctly.

That only explains why you used a p mosfet as a high side switch but not the the reason why a high side switch is useful. Then the p channel mosfet is used to switch the positive supply to the motor for forward direction high side switching while the n channel mosfet is used to switch the negative supply to the motor for reverse direction low side switching. This transistor connects between v and the load. Although the p channel mosfet cannot complement the n channel in both on resistance and capacitance simultaneously such combinations as the low threshold p channel.

If your load voltage is higher like 12 or 24v then you might want to use an n channel mosfet in a low side configuration. N channel mosfets have lower on resistances than p channel mosfets so are preferable if you have the choice of which side to switch. There are a variety of configurations for driving the two mosfets with many different applications. Here s my schematic and board design for a simple high side switch using a p channel mosfet.

It s a simple circuit that has a input for positive and negative and an output for positive and negative connections.