Thank you very much, now I found the reason for burning mosfets trying it in ciecuits without galvanic isolation between cold and hot side.

Interesting video, great explanation how all this works for those of us who are not engineers. Thank you.

@FoolishEngineer

2 жыл бұрын

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Best mosfet driver for High frequency PWM

Thank you very much

Well explained. Thank you

@FoolishEngineer

Жыл бұрын

You are welcome

Hi friend thanks for another informative video

@FoolishEngineer

2 жыл бұрын

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

Good information ❤🎉

@FoolishEngineer

11 ай бұрын

Thanks

cool nice video :)

@FoolishEngineer

2 жыл бұрын

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

Thank you

@FoolishEngineer

Жыл бұрын

You're welcome

Thanks!

@FoolishEngineer

Жыл бұрын

Thanks a ton for your contribution!!!!

A driver ic is more expensive then transistor so a simple totem pole can be use that provide more current like tip41c tip42c and voltage scaling is required to get high side volt of 20.5 v two transformer is required for the phase shift is done winding 32 turn of 24 gauge copper for voltage scaling to get best high voltage for drivers the igbt in high side .core area and materials is mnzm pc40 (20mmx25mm ) low side turn most be the same as primary. The first transformer high side is connected to Q1 mosfet and the second transformer low side is connected to Q2 mosfet and same is done for the Q3 and Q4

thank you , how much the primary current was ?

Very very good sir

@FoolishEngineer

Жыл бұрын

Thank you so much!

How can death-time insertion be included to prevent 'shoot trough' in this circuit? Some nice dual output IC's with death-time regulation were found, but their dual outputs were either both positieve or both negatieve. Is it understood correctly that both outputs must be of opposite polarity, so positive & negative? Do yo know any respective IC drives which incl death time regulation please?

Can this gate drive transformer partan be used in a 50hz oscillation controller circuit?

Can we use optocoupler as an isolated gate driver? Thank you. Proud subscriber here. ❤

@tejonBiker

2 жыл бұрын

In theory yes, but it's not very practical, is better combinate with small transistors to propagate signals to the power transistor

@FoolishEngineer

2 жыл бұрын

Thank you so much! Please show support to my video with Super thanks. Please wait for my new videos!! I am sure you'll find your answer.

@dingsens2810

2 жыл бұрын

No, you can not use an optcoupler as a gate driver, at least not on its own. To make this work, you would need an isolated power supply. Additionally, since the optocoupler provides you only a transistor output, to make it work in high frequency applications you would still need either a proper gate driver or at least a transistor drive stage, otherwise you would have to make the pull up or down resistor too small for practical use. Besides, if you already have a power supply, you could also use a digital isolator ic like the SI8421. And at this point why not use a proper high voltage half bridge driver.

What was the problem pwm ic and mosfet burning on isolated gate driver circuit. When 400v side moset switching time 12v side mosfet will get short and burn after that pwm ic also burn. 400v side mosfet and resistor all good

Can the TL494 be used to run single primary coil, 2 MOSFET , high + low side gate driving Forward converter without the transformer coupling ?

@edinfific2576

Жыл бұрын

It only has about 200mA driving current capability, you would need to amplify it with a PNP/NPN pair capable of at least 500-600mA, but 1-2A is recommended minimum.

Does input A and B need to be inverted? so when A is high B is low and vice versa ?

@FoolishEngineer

Жыл бұрын

yes

I need to get some transformers.

@FoolishEngineer

2 жыл бұрын

Sorry I don't have any affiliate link😅

@Electronzap

2 жыл бұрын

@@FoolishEngineer too bad lol. That's a big reason why I made a website, and keep it even though it doesn't get much traffic. I needed one for Amazon affiliation.

Is there any book that teaches all this electrical ckt. ? Curious please let me know. Thanks!

@FoolishEngineer

2 ай бұрын

you can see the references of such things in my video description

Please explain how igbt works.. Need an urgent lesson about it

@FoolishEngineer

Жыл бұрын

I am working on it!

sir my name is waruna kumara iam from srilanka , need to ask a question from you sir , in this video you were explaining about the action of high side mosfet but to drive it you need to connect source to ground but it hasnt happend due to low side fet is in the off position , please be kind enough to explain this

@tejonBiker

2 жыл бұрын

I highly recommend see the videos about transistors/mosfets in the description of the videos. Transistor can be tricky to understand, the key to answer your question is: the voltage applied to turn on the mosfet is Vgs (Voltage Gate-Source), this means, positive voltaje (in case of N-Channel Mosfet) measured in the gate (positive probe) and in the source ( negative source). "about the action of high side mosfet but to drive it you need to connect source to ground" You can have your source pin connected to ground, this is source-common configuration, this is quite common in low voltage non isolated application, or in this case the lower part the half bridge, but is not the only case. You can trigger mosfet in "floating position" (source not connected to "GND"), but remember, you need a dedicated/isolated power supply with positive output at gate-pin in the mosfet referenced with the source-pin, no matter if the source-pin is connected to ground, this is where transformer enter, the transformer driver can create dedicated/isolated voltages and at the same time send activation signal (is a win-win). I hope this helps, from a guy that in their time have the same questions.

@warunakumara7671

2 жыл бұрын

@@tejonBiker thank you for the explanation sir , ill study about the floating position of a mosfet and if i got questions ill ask from you thank you sir

Надо и нагрузку силовых транзисторов показать.

@FoolishEngineer

Жыл бұрын

Благодарим вас за вклад. Это просто для представительских целей.

I think that there is a small, but significant mistake... kzread.info/dash/bejne/dpmMlMdpmrSel6w.html If you would drive this circuit AC coupled with the serial capacitor, then the duty-cycle would be limited to

Here the dead time can be an issue

Bentuk fisiknya cukup kecil.

Wasted