P-channel MOSFET as a High side switch | Why is it hard to use N-channel MOSFET as high side switch?

as a beginner in electronics, i spent ages trying to read and understand this concept. thanks for making sense of it - you explanations backed up with examples makes it so much easier to conceptualise!

Hi, I am a chip designer, and I love your clips, because it teaches me how to do many things at the PCB level. In the chip level, we use either a capacitor or butterfly circuit to do this. In capacitor method as you know, we connect the capacitor to ground and Vsup through two switches, then when we want o turn on the high side NMOS switch we We turn the capacitor switches off and connect the ground of capacitor to supply and the other side of the cap to the gate. The gate of NMOS will fly to twice the supply voltage which turn of the NMOS. However, doing this in chip level is easy because the transistors are almost free, but at the PCB level we need four transistors to do that and becoming familiar with the chips that are already available is a blessing and better way to do that. This is why your clips are so interesting to me. Thanks for the good work.

By far the best video about mosfet switching on YouTube. Great job!

Looks like your channel has become a MOSFET dedicated channel now :p But that is a good thing probably. All the relevant information needed in one place. Your videos are at a digestible level for someone who knows some hobby electronics. And I really like that you do not try to pack too much in a single video. Ideal for use in teaching. Wherever someone asks me something related to mosfets i just redirect them to some of your videos. Keep up the great work!

thank u for this vid. It really helped me understanding the function of different mosfets and selecting the right mosfet for a power source selection switch.

Thank you for this very useful content. I really like that you separate it in multiple videos. This way it's very detailed and at the same time easy to find what someone is looking for. Great work

Thanks for a clear description of biasing a p channel MOSFET!

Concise explanations with excellent visual's!

you ahve finally made sense of the -V values in p-channel data sheets, I cannot thank you enough :p

Your are a Smart Engineer. Getting to learn more that I didnt know from you.

I'll be honest, the accent is a bit difficult for a non-native speaker but you are trying incredibly hard to make it work and that's noticeable, the video quality is top-notch, everything is explained very well and understanble.

Thank you so much!

gracias x el video y por los subtitulos en ingles ....ayuda mucho

Great information

Thank you very much! I don't see yet, how you could switch OFF the P-MOSFET , i.e. how you could change the positive gate-voltage from VDD to 12V-MOSFET-supply...? Is an internal BIP-Transistor used for that inside the MOSFET-driver?

Thank you

With a P-FET, switching on the FET is usually not a problem....just switch your driver pin LOW. However, switching it off may be a problem. Sure, if your driver pin is equal to the voltage on the Source, it will switch off, but most output pins of say a microcontroller, will not reach Vcc but stay slightly below it. If your MOSFET has a LOW Vgstreshhold tat might be enough to slightly open it. If one picks a MOSFET with a Higher VGS(th) that should not be a problem....but then say a 3V3 system may not be able to fully open the P-FET

Thank you sir .

You could have emphasized the comparison with a bipolar transistor. When the switch is connected with a common source configuration, the MOSFET works an an amplifier. When the MOSFET is connected in a common drain configuration, it acts as a voltage follower, with unity gain...

Hello, I like your videos, I want to learn that, what is the advantage of high-side drive over low-side drive, when is it better to choose high-side drive, and also what is the effect of them on the efficiency of the circuit(which has higher efficiency)?