9 Ways to drive a MOSFET

April 28, 2024 : Viewers have discovered some errors in the video/schematics, be aware!

0:00 Direct drive
0:57 Low side driver IC
1:46 Push-pull
2:41 inverted level shifter (NOTE: Should be PNP transistors in schematic)
3:31 High side driver IC
4:32 Bootstrap circuit
5:42 Floating gate driver
6:17 Opto-coupler
7:16 Charge pump

[foogod]

There are high-side driver ICs which can be "always on" (and manual control) just fine. That's just a limitation of that particular chip, not of the category in general. (and actually that chip can be controlled by manual signals too, if you wire it up correctly. It has nothing to do with being a "safety feature")

Also, the optocoupler design can do PWM just fine, if you choose optocouplers with appropriate switching characteristics. A better approach would just be to use one of the other driver circuits and isolate the input using a single optocoupler instead, though.

[khimroy]

If two switches press it will short circuit the power supply ! Be careful !

[PhG]

Waw, what a great video and at the same time your channel/site!

[fredheilema]

In the inverted level shifter circuit schema are NPN transistors drawn. They should be pnp transistors. In the comment you speak of pnp transistors which is correct.

[isacdaimary]

I wish I got your videos a year earlier. Thank you so much Sir

[ccv]

Great information, and diagrams. Thankyou much.

[andrewsydney]

Number 6 and Number 7 will not work. Both sides of the lamp are connected to ground. There is no possibility of a voltage across the lamp.

[toma.d]

wrong schematics for floating gate driver and opto-coupler, sources connected to ground shorting the mosfet when on.

[yousefalhelabi]

The circuit at 1:50 works well with me using IRZ44N MOSFET and supplying a PWM from the Arduino.

[nissaarwz]

If i have a build a "driver circuit" to turn on or off an automotive coil (use 5v pwm signal to turn on), which method would you rather use?

[wahyu_zx]

what transistor can i use for pushpull driver for esp32 with 3.3v logic level

[ArcanePath]

I'm so confused. I bought a logic level N channel FET and it drives from the Arduino when connected to 5v VCC. For some reason my pin outputs, no matter what digital pin I use, don't output enough voltage (or current) to keep the thing on. I checked my code is set to PINMODE output so I don't know what else to do.

[MANINDERSINGH-bwms]

Thanks fiŕst.sir is it possible that we can isolate drive circuit from mosfet, because when mosfet damaged or shorted(usually we face in repairing circuits) it damages drive ic .can it be seprated through capacitor or by other means?.thanks.secòndly what is best trap for overvoltage zener(sometimes it get open and circuit damages) or crowbar or any suitable provision.thanks

[shafikgeorgeskhouzam]

Error in the floating gate driver at 5:52, the lamp is always off

[vidtechnology]

does bootstrapping limits switching frequency ?

[Dc_tech]

Question the high side switching is very difficult to drive with high voltage of the voltage is 160vdc to the higher side mosfets the gate can handle voltage higher the 20volt so how can the gate get change higher then the supply voltage of 160v to work explain this I use driver transformer to drive the low side switching but the mosfet get hot at 20v to get still this how can I drive 160vdc in a high switching or it’s not possible

[kennmossman]

i can ride a bike, fly an airplane, sail a boat but can not drive a mosfet

[quevineuxcrougniard]

Sa démonstration est très intéressante et très bien faite mais il nous agace avec son accent auvergnat, le gugusse ! On ne dit pas : "moche Fête" mais on dit : "MOS FET". Même chose pour le : "pouche poul".