Comments on: Mazilli ZVS flyback driver

By: Mads Barnkob

Mads Barnkob — Thu, 27 Oct 2011 16:45:12 +0000

Hey Alex

Good results you got there

Keep experimenting!

Kind regards
Mads

By: Alex

Alex — Wed, 19 Oct 2011 08:10:26 +0000

I finally got round to trying mine out on 36v input,

http://www.youtube.com/watch?v=XhOqcNS6RKY

lol I originally had the same problem as you did on that photocopier flyback, my primary coil wire was too thin and started smoking!

By: Mads Barnkob

Mads Barnkob — Mon, 10 Oct 2011 09:39:12 +0000

No you can not, if you look at the datasheets for the 2N3055 transistor and the IRFP250 MOSFET you will see that there are considerably differences in their specifications and they are not even the same type of transistor.

By: LAKSHMI

LAKSHMI — Sun, 09 Oct 2011 18:52:42 +0000

can is use the 2N3055 instead of IRF250at same 20vDC please reply me i am about to do this because this circuits gives good performance rather than other circuit i am waiting for your reply…….

By: Alex

Alex — Fri, 09 Sep 2011 01:37:14 +0000

Thanks for the reply. I will leave the revenue sharing for that video turned off then, or at-least until if the video ever became very popular (which I doubt it ever will).

Oh I know that it was designed by Vladimiro Mazzilli and I have given him credit in the description. (Any idea what year he came up with it?).

Regards,
Alex.

By: Mads Barnkob

Mads Barnkob — Thu, 08 Sep 2011 16:39:02 +0000

Hi Alex

Its is infact Vladimiro Mazilli that deserves all the thanks for this design, just a heads up on ads, it takes years to get a payment when you are just a private person

Kind regards
Mads

By: Alex

Alex — Thu, 08 Sep 2011 04:36:23 +0000

Hi Mads.

YouTube have recently gave me monetisation features which enables me to make money from adverts on my videos.

I have enabled them on a few of my videos already but though I would get your permission first before I enable them on the video I have embedded in my comment above. Since I followed your component list in the schematic to make this circuit I feel I should ask first before I enable adverts since you came up with what components to use.

Just let me know in the comments here, I will not be offended in any way if you do not want me to enable adverts on the video I uploaded above.

Thanks,

Alex.

By: Mads Barnkob

Mads Barnkob — Sun, 04 Sep 2011 07:11:45 +0000

Hello Ricardo

I can understand from your parts in question that you want to run at higher voltages, it can be done but you might run into some practical problems like…

1) If you run the circuit from a variable power supply, you will initially draw too much current at low voltage and your components might not be able to handle that.

2) You need some voltage overhead for your MOSFETs to survive, using the IRFP250N MOSFET rated for 200 Volt, I would say that about 40 Volt is good safe limit. Thus for the IRFP460BF it would be around 100 Volt input, maybe even less.

3) Higher voltage also means that you will be running a higher Volt/turn for your primary coil wound on the flyback transformers core, this will eventually fail if its too high, you should use 8+8 windings or more. More windings will also mean reduced power output, but your MOSFETs will survive instead.

In the end there might not be a big difference in the output from going for high voltage as you have to take your precautions to insure its safety.

By: Ricardo

Ricardo — Sun, 04 Sep 2011 02:00:09 +0000

Hello

Can be used IRFP460PBF?

Diode MUR860 ZVS circuit?

I await your return
Thanks Ricardo

By: ciprianwiner

ciprianwiner — Thu, 18 Aug 2011 12:14:04 +0000

Hi Mads, You have a really nice setup there i will try to buy some better mosfets because mines just dies IRFZ44N and other that are non suitable for this application so my question is if i can use: IRFP240 or IRFP450 or IRFP9240PBF don’t know which(IRF450 is my choice because of the price) please let me know which of them is the best for the job.
Regards Cip