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Recent content by Iykeeh Ezeonyekwelu

  1. I

    Query on about a 12VDc-310VDC smps unit

    Yea... about feedbacks, I saw few circuits online with outputs sharing the same ground with general ground, perhaps, because the output voltages ar not lethal, like an SMPS I saw with dual 35VDC output, the feedback from this output wasn't isolated.
  2. I

    Query on about a 12VDc-310VDC smps unit

    I can't tie the problem to anything...am thinkin of attaching regulators to the outputs to keep it fixed, but just worried. please, I need help.
  3. I

    Query on about a 12VDc-310VDC smps unit

    Thanks a lot Guyz.... u guyz rock!. Sorry 4 my long absence, am coming work with school so time is more of a serious issue. Av made the circuit using SG3525 oscillating at 80khz, all seemed but i tried quite a couple of ir2110, 2112....all failed, couldn't get a genuine part. I resorted to "Old...
  4. I

    Query on about a 12VDc-310VDC smps unit

    Thank you bery kindly my friend.... Now it's starting to make sense to me. lemme start doing some home work. I will keep checkin for further inputs. Any contribution is appreciated, No knowledge is a waste.
  5. I

    Query on about a 12VDc-310VDC smps unit

    Sorry about the way i sound...... I don't know much about gate charge and drive current relationship. If there is a formular for it, it might b useful to me. I just don't want to jump into what i don't know.
  6. I

    Query on about a 12VDc-310VDC smps unit

    Thanks for your quick response but you are like going in circles. How do i detetmine the required current for the FET cos all i see from the datasheet is gata charge.
  7. I

    Query on about a 12VDc-310VDC smps unit

    What i don't know is how to calculate to get the gate current that can efficiently switch the FET's at hundreds of kilohertz. Something like a formular that can compute some parameters and give the current required. - - - Updated - - - This is my first SMPS unit..... Current Economic state...
  8. I

    Query on about a 12VDc-310VDC smps unit

    Yea, about that.... forgive my ignorance cos i don't know much. please, can you detail me on the frequency, current and gate charge relationship. Thanks alot.
  9. I

    Query on about a 12VDc-310VDC smps unit

    I was thinking that SG3525 have enough current to efficiently drive two IRFB3207 per leg.
  10. I

    Query on about a 12VDc-310VDC smps unit

    Hello Guys..... Been a very long time. I wish to design a 12VDC-310VDC SMPS unit. I picked SG3525 to provide 150khz PWM on each leg of IRFB3207. My question is, Can the FET go as high as 150khz?. My transformer is ETD44, from the datasheet, it gives approx. 500W at 100khz. My guess is that at...
  11. I

    Bridged inverter upgrade

    time 4 some upgrade, Hello friends, I would like 2 tweach my bridge inverter to pure sine wave, I waz thinking, from my sg3524n ic, send the signals to a second order LPF I made with lm324, then send d signal. to a pulse transformer Wired in bridge before switching d power FETs. I will switch...
  12. I

    [SOLVED] SG3524N 50hz bridge inverter

    thanks people
  13. I

    [SOLVED] SG3524N 50hz bridge inverter

    Tnx people, d cct is now working, Tnx alot, now, lemme c how I can tweach it a little.
  14. I

    [SOLVED] SG3524N 50hz bridge inverter

    I will complete it and let u know of the result, I used an opto isolator(pc817) in place of the transistor just for trial but I will use c9014.
  15. I

    [SOLVED] SG3524N 50hz bridge inverter

    hello kabeer, Thanks alot. The circuit is working after some little remod. Without connecting the bootstrap cap and FET I have about 5.8v . My little question is; if I connect it as it should, do u think it will fully switch ON my irf3205 FET because am running it from a 12V? I don't want my FET...
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