How to increase MOSFET switching speed? MOSFET gate driver

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How to increase MOSFET switching speed? MOSFET gate driver

Рет қаралды 43,836

Күн бұрын

#foolishengineer #MOSFETdriver #gatedriver
0:00 Skip Intro
00:37 What to do to increase MOSFET switching
02:42 Turn off diode
04:07 PNP turn off circuit
06:22 NPN turn off circuit
References:
- www.ti.com/lit...
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Пікірлер: 59

@donmcilroy6362 Жыл бұрын

Hey, this adding a PNP transistor and a diode in the FET driver circuit really helps the efficiency! I am driving a STP60NF06 and I am putting a good bunch of current through that fet. I put the series doide and the PNP transistor across gate to source on fet and amazing. Before I was hitting that fet with pulses about 90us and the fet was cooking hot in about 4 to 5 mins, with your arrangement the fet hardly gets warm, "about body temperature" with that pulse width after 15 mins. I have been upping the -on pulse time, and I am really impressed. Great help! You must be a smart guy. I like that kind of help!

@FoolishEngineer Жыл бұрын

That's great, can you please share a video with me? I would like to show it other viewers as well!

@m3chanist Жыл бұрын

You have the most ironic channel name, there is nothing foolish here. I have been using your channel as a frequent goto reference. Love and support clicked, subscribed.

@FoolishEngineer Жыл бұрын

Thank you so much! Please show support to my video with Super thanks

@danielfuentes8906 11 ай бұрын

Hola, muchas gracias por tomarte el tiempo al explicar estos circuitos y su funcionamiento. Agradezco que puedas ayudarme en mis problemas electrónicos con este tipo de vídeo. De antemano, muchas gracias y desde ahora te has ganado mi suscripción. Sigue así Bro.

@opposites-369 2 жыл бұрын

I finally found a good channel to learn electronics 👍🏻🙏🏻✨💖

@rockpadstudios 2 жыл бұрын

yeah he is doing a great job of explaining key concepts he doesn't just say the usual teacher based text.

@FoolishEngineer 2 жыл бұрын

Thank you so much for watching!! Please don't forget to subscribe to our channel

@FoolishEngineer 2 жыл бұрын

Thank you so much for watching!! Please don't forget to subscribe to our channel

@opposites-369 2 жыл бұрын

@@FoolishEngineer of course I will, thx to your sharing, maybe I've seen a schematic or diagram on a resistor component, or a capacitor or maybe a diode, connected between the collector & emitter, what is the purpose of that, have you made a video about this? thank you 👍🏻🙏🏻✨

@ministryofrailways7378 2 жыл бұрын

If possible make a video discussing various high side & low side drivers with some basic explanation of their specifications. ( reading data sheet is not easy, if you could provide what to look for in data sheet it will be good)

@FoolishEngineer 2 жыл бұрын

Yes, I'll

@EhsanZia-Academi Ай бұрын

Thank you for this video. Could you please guide me to find such a reference for BJT as a Switch and how to make it faster switch?

@matteotordi9674 Жыл бұрын

Good explanetion, but it works with diode ante BJT PNP only in off transition, how in on transition?

@georgetomy1746 9 ай бұрын

Amazing explanation

@ajingolk7716 2 ай бұрын

What about a voltage follower inplace 🤔

@borensztejntitouan736 14 күн бұрын

Hey, what is Vd(off) ?

@Blandy929 9 ай бұрын

Good ideas and explanation. What about the differences between the p channel and n channel in this kind of curcuit. Could a negatively operated device switch on and off quicker with similar supporting circuitry?

@maciejc.617 Жыл бұрын

Material is really interesting and full of useful information. I want to ask you for only one thing. Add english subtitles to your awesome vids, because your accent in some parts is hard to be understandable. Thx for your work and effort :)

@FoolishEngineer Жыл бұрын

Thank you so much!! You can turn on the CC from youtube. I have uploaded my subtitles over there

@Dc_tech386 Жыл бұрын

Question i use the diodes and pnp transistor to drive my inverter and dc to dc converter but when I try to use it in buck converter the mosfets heating up in positive buck converter but don’t heat up at low side buck converter I try rising the voltage to 20 volt but still heating with no load so I wonder why the boostrap 15 volt drive the high side without heating up but 20 volt do without the boostrap

@juanmf 14 күн бұрын

Speed difference between MOSFET and transistors?

@Pythonclcoding 2 жыл бұрын

why do you choose always a low side mosfet driving. Could you please use HIGH side mosfet and explain in next video?

@FoolishEngineer 2 жыл бұрын

Please stay tuned, working on it!

@danieloctrinov7681 Жыл бұрын

About q1 and q2 scheme, can you explaine more detail please

@ahmedadel-ex4ww Жыл бұрын

can we just connect a bleeding resistor (gate to ground)?

@abol7asan523 10 ай бұрын

Hi.... how I know what is the GATE resistance of any mosfet...?? I have 10 mosfet WFP75N75 but i don't know hwo much resistance of there gate and hwo much RGS. ..

@sortofsmarter 2 жыл бұрын

Great explanation this really help me with gate operations and functions. Do you have a recommendation for a Gate driver IC?

@md.razonchowdhury3256 Жыл бұрын

Information are good. It will be the best if you build the hardware in lab and show the effects practically. Best of luck

@FoolishEngineer Жыл бұрын

Thank you, I will

@rubensan40 3 ай бұрын

8 Parallel mosfet in 20khz 60vdc? Drive?

@iurlc 2 жыл бұрын

The third solution with the 2 NPN transistors will not work as you described. When driver is turned off, the base voltage for Q1 is only supplied via the FET gate capacitance. If the gate of the FET is at 0.7V the Q1 is turned off and cannot further discharge the gate capacitance. But also the turn on process is critical. You have the voltage drop of the forward diode and the voltage divider (two resistors before and after the diode) which will decrease the turn on behavior. I would not use any shown solutions.

@FoolishEngineer 2 жыл бұрын

Good for you

@ishwarprasad935 Жыл бұрын

Could you please explain what I want to know , How can I get 1000v d.c by I G B T

@J.Amaral Жыл бұрын

Hi I'm trying to run a 12V car fan with a power mosfet, but I'm having issues, the Mosfet is perfectly warm, no excess, but the reverse current diode I can fry eggs on it... Can you help me make a circuit from a microcontroller output of (preferably) 3.3v to the mosfet so that does't happen? Tried several frequencies, the higher the worst (I actually wanted to go upwards of 10khz to lower the noise of it)... Driving a half H bridge there are several cheap options like IR2101, but to drive just 1 N-channel mosfet nothing, its expensive or unavailable usually! Thanks and great videos!!!

@learnnow9598 Жыл бұрын

Bro how to get 50hz frequency output if we use mosfet for inverter circuits?

@wersinozturk 5 ай бұрын

👍👍👍👍👍👍

@ludovanginderen6850 2 жыл бұрын

thanks ,great video's

@FoolishEngineer 2 жыл бұрын

Thank you so much! Please show support to my video with Super thanks and don't forget to subscribe to our channel

@richardappow6770 Жыл бұрын

What software are you using for the video presentations?

@alexnoggle1874 Жыл бұрын

Should the NPN & PNP turn off circuits only be used when the MOSFET source is connected to ground then?

@JensOverby Жыл бұрын

This is really an important question, and I would also very much like an answer to this. Does it only work when source is connected to ground, or can it also work for the high-side mosfet in a half bridge?

@user-ty6hl5ux9z 8 ай бұрын

Very good understanding but don't write text over diagram nothing is seeng behind the txt plz

@pramodkumarsahoo3361 Жыл бұрын

Thanks!

@FoolishEngineer Жыл бұрын

Welcome! And thank you for super thanks contribution!

@sadeqmola2878 Жыл бұрын

in the pnp structure, it seems that the pnp speed should be faster than the fet switch. so how should i find a fast(er than fet) pnp BJT?

@FoolishEngineer Жыл бұрын

You can find faster PNP BJTs but you won't be able to drive heavy loads with it

@aydingokcukurbulut4762 2 жыл бұрын

tesekkurler

@FoolishEngineer 2 жыл бұрын

Çox sağ ol! Zəhmət olmasa videoma Super təşəkkürlə dəstək olun.

@SMV1972 2 жыл бұрын

Круто!

@rajkumarsaini3840 2 жыл бұрын

Circuit is not seen

@sleepyjaguar 4 ай бұрын

Everything is fake my ir2104 is not working I have tried dozen of different kinds.😢

@dragodv7735 Жыл бұрын

I love your videos,but in this one You try to force the words to come out. As you do not speak perfect English , you must take your time to spell the words out , It is very hard for me to understand what you are saying buddy. Keep up the good work.

@FoolishEngineer Жыл бұрын

I will try my best