Basic Electronics, MOSFET turn-on threshold voltage (VGS)
Ғылым және технология
#shorts
The Innovati0n Lab is introducing the Basic electronics shorts segment with the aim of explaining some crucial details of electronics circuit components usually covered in the component datasheet.
In this video, we will explore the VGS threshold of an N-channel MOSFET (IRF640), so as to provide a better understanding to a curious audience.
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Пікірлер: 11
Innovation lab.
@theinnovati0nlab782
Жыл бұрын
It's The Innovati0n Lab, my friend! 😊 Thanks for watching our videos, and kindly let us know if you have any questions.
Ayyooo, that solder tip is soooooo clean. What soldering iron is that?
@theinnovati0nlab782
4 ай бұрын
Hahaha, that was a butane soldering iron I reviewed a while ago. Check out the review video below. 👇👇👇 kzread.info/dash/bejne/pnatq6OvfNucesY.htmlsi=fc4v_EdiA5BXAV7v
Not always 2.2v, to drive the gate into full saturation you need about 10v
@theinnovati0nlab782
3 ай бұрын
That is very correct!!👍👍 This video only shows the VGS threshold...which also be slightly variable for each individual MOSFET. This is why min and max ranges are provided in mfr. datasheets. Your best/lowest RDS(ON) will be at full saturation, which is at a higher end of the actual VGS ratings....not at threshold. Thanks for the wonderful engagement. I love it when someone can talk electronics, hahaha. The Innovati0n Lab💥 www.theinnovati0nlab.com
Can a mosfet act like potensiometer? I try with irfz N channel to making variable speed, but always failure. I change to transistor and work.
@theinnovati0nlab782
4 ай бұрын
Enhancement mode MOSFETs can be driven to operate as high power resistors - when operated in the linear region. So yes, they could act as resistor but. However, to get them to act as pot, you made need a cascade of two MOSFETs.....I am just thinking on the fly. More design analysis would be needed to implement something like this. I hope this helps. - The Innovati0n Lab💥
Turn-On seems to come On at correct voltage, or am I missing something?
@theinnovati0nlab782
8 ай бұрын
You are absolutely on the tight track.👍👍👍 N-Channel MOSFETs basically have three modes or operating regions. - Cutoff, - Linear, and - Saturation. You can turn the MOSFET slowly in linear mode (not recommend for switch-mode power design), once you have reached the minimum Gate-to-source (Vgs) turn-ON threshold voltage.....which is usually between 1 to 4V for most MOSFETs. In full saturation mode, the MOSFET will turn ON as long as the applied Vgs is > than the threshold. I hope this helps. Sorry if I may have confused you with too much detail. 👍😎 The Innovati0n Lab