How to increase MOSFET switching speed? MOSFET gate driver
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- เผยแพร่เมื่อ 15 มิ.ย. 2024
- #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/ml/slua618a/sl...
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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!
That's great, can you please share a video with me? I would like to show it other viewers as well!
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.
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.
Thank you so much! Please show support to my video with Super thanks
Amazing explanation
I finally found a good channel to learn electronics 👍🏻🙏🏻✨💖
yeah he is doing a great job of explaining key concepts he doesn't just say the usual teacher based text.
Thank you so much for watching!! Please don't forget to subscribe to our channel
Thank you so much for watching!! Please don't forget to subscribe to our channel
@@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 👍🏻🙏🏻✨
Great explanation this really help me with gate operations and functions. Do you have a recommendation for a Gate driver IC?
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)
Yes, I'll
thanks ,great video's
Thank you so much! Please show support to my video with Super thanks and don't forget to subscribe to our channel
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?
Thanks!
Welcome! And thank you for super thanks contribution!
Good explanetion, but it works with diode ante BJT PNP only in off transition, how in on transition?
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!!!
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
What software are you using for the video presentations?
tesekkurler
Çox sağ ol! Zəhmət olmasa videoma Super təşəkkürlə dəstək olun.
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 :)
Thank you so much!! You can turn on the CC from youtube. I have uploaded my subtitles over there
Bro how to get 50hz frequency output if we use mosfet for inverter circuits?
About q1 and q2 scheme, can you explaine more detail please
Information are good. It will be the best if you build the hardware in lab and show the effects practically. Best of luck
Thank you, I will
What about a voltage follower inplace 🤔
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. ..
can we just connect a bleeding resistor (gate to ground)?
why do you choose always a low side mosfet driving. Could you please use HIGH side mosfet and explain in next video?
Please stay tuned, working on it!
Круто!
👍👍👍👍👍👍
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.
Good for you
Could you please explain what I want to know , How can I get 1000v d.c by I G B T
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?
You can find faster PNP BJTs but you won't be able to drive heavy loads with it
Should the NPN & PNP turn off circuits only be used when the MOSFET source is connected to ground then?
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?
8 Parallel mosfet in 20khz 60vdc? Drive?
Very good understanding but don't write text over diagram nothing is seeng behind the txt plz
Circuit is not seen
Everything is fake my ir2104 is not working I have tried dozen of different kinds.😢
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.
I will try my best
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