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Thread: TL494 schematic by 0xff

  1. #61
    Yes I will try with gate drive transformer too but I want to make it without also.

    I can't find IR2110 which is not fake in my country.

    Or messenger on facebook
    Lets use messenger. My fb is https://www.facebook.com/mntttttt
    Add me as friend.

  2. #62
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    I added you on FB

  3. #63
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    I can't find IR2110 which is not fake in my country.

    Try here usually you get good components. Find the country nearest to you

    https://www.utsource.net/

  4. #64
    Yes but there is a shipping..
    Its cheaper to make it discrete with transistors. Im almost there, only this problem with the high voltage. It works perfect with low voltage.
    I suppose the mosfets are fake.. Tommorow I will try with a 100% genuine IGBT i have from broken TV.
    Last edited by expressel; 02-04-2019 at 08:03 PM.

  5. #65
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    Fake mosfet get hot very quickly at 0.25 load current. That is the only fault because the die is smaller than it should be.

    take a look here https://www.youtube.com/watch?v=gRRfb5YxvIA

  6. #66
    I found out I can't make it discrete with transistors without using a fast optocoupler like these:

    TLP2367 - 50 Mbit
    TLP2767 - 50 Mbit
    APS1551S - 50 Mbit

    I went the GDT way for now and have a progress. I achieved 100W and have little more work to do.
    Will post correct schematic and GDT trafo details when everything done.
    Last edited by expressel; 02-15-2019 at 11:03 PM.

  7. #67
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    From design to reality its not so simple at times. When you try things out you will really know the outcome.

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