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Recent content by hkBattousai

  1. hkBattousai

    Obtaining 12V from a wide range (20V to 200V) DC input

    I need a simple DC-DC converter to obtain 12V voltage from a variable DC input voltage. Please don't offer me to use a SMPS topology, because this 12V DC itself will be powering a Buck converter IC. This 12V will be powering this Buck converter IC and a few opamps; I presume that the load...
  2. hkBattousai

    Solid State 110 Volt timer delay circuit help

    This one will work for sure: **broken link removed** EDIT: Opamp inputs will be reversed. Vref ==> Inverting input Vcharge ==> Non-inverting input
  3. hkBattousai

    Solid State 110 Volt timer delay circuit help

    That's OK, no problem if you referred to its datasheet.
  4. hkBattousai

    Solid State 110 Volt timer delay circuit help

    So, how do you know Vgt? Does it have a standard value?
  5. hkBattousai

    Solid State 110 Volt timer delay circuit help

    Of course, we will assume that it is initially 0V. BUT, what will be its final value?
  6. hkBattousai

    Solid State 110 Volt timer delay circuit help

    Oh, yes you're right. I calculated it wrongly. How did you do the math without knowing VC2?
  7. hkBattousai

    Whould this circuit work? (Driving p-Channel MOSFET)

    Actually there are diodes in the original design, but I simplified the circuit while drawing this picture.
  8. hkBattousai

    Whould this circuit work? (Driving p-Channel MOSFET)

    From the very start I insisted on making a completely solid state design. But looks like the hardware design challenges are pushing me to use standard relays once again. I wish those SSRs weren't that much expensive...
  9. hkBattousai

    Whould this circuit work? (Driving p-Channel MOSFET)

    Yes, very good idea. Would it cause any problem like overshoots or spikes while switching between transformer taps?
  10. hkBattousai

    Solid State 110 Volt timer delay circuit help

    Circuit explanation: When you first power up your circuit, C1 starts charging up over R1. When the voltage on C1 reaches to enough level ("enough level" is the voltage that is enough to trigger the thyristor or triac. Refer to its datasheet), the thyristor conducts and starts to charge up C3...
  11. hkBattousai

    Whould this circuit work? (Driving p-Channel MOSFET)

    **broken link removed** I'm designing a power supply. Main power source is a transformer. The transformer has multiple taps; 9V, 15V, 24V, 36V, 48V. For obtaining as much efficiency as possible, a control circuit is monitoring the output voltage of the power supply and switching between...
  12. hkBattousai

    Ferrite core driving circuit?

    Ok, I will try that configuration now... My current circuit is like this: **broken link removed** All I'm trying to see is that, a 5Vp-p pulse in primary windings is directly transferred to the secondary windings (of course there will be some loss). After a little research I learned that a...
  13. hkBattousai

    Ferrite core driving circuit?

    I tried connecting the MOSFET to the lower side too, but it didn't make very much change. I used "Microsoft Visio" for entire drawing. That's n-MOSFET in my circuit, I used the wrong symbol in the schematics.
  14. hkBattousai

    Ferrite core driving circuit?

    **broken link removed** I'm designing a switch mode power supply which can be described by the block diagram above. The pulse generator circuit consists of a 555. Output of 555 is directly connected to the gate of the MOSFET (6N60). A 100Ω resistor is connected to the secondary windings of the...

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