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Registered Member #3451
Joined: Sun Nov 28 2010, 11:13PM
Location: United States
Posts: 100
A few months ago, I whipped up a quick Mazzilli flyback driver, and it seemed to work fine (although I later disassembled it). Yesterday, I needed a high-current capacitor charger, so I tried replicating it. No output whatsoever - I even took the circuit apart and rebuilt it six times.
These are the parts I used (and am currently using): x1 6V lantern battery x2 IRF510 MOSFET x2 1N4007 x2 1N4742A 12V Zener Diode x2 470 ohm resistor x2 10k ohm resistor x1 1.0µF 250V 10% Metal-film Capacitor x1 100 micro-henry inductor
The only difference is that I had a different battery brand last time, so if there is a problem, I suspect that's it. I'll get the same type of lantern battery and update my results, but I have a lot of doubts. Can any of you see another flaw that may be present with the above components?
Registered Member #89
Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
hello,
First clue, "no output" as with or without load (capacitor) . While in "no output" state, does the circuit short out the power supply or draw little current at all? If it doesn't short the power supply, you wired it up wrong (let me guess - check how you placed your diodes)
You didn't say what kind of a transformer are you using. A PC power supply transformer in reverse, or what?
Your diodes could be replaced by faster ones, but those mosfets are also a very bad choice. If you insist on running from 6V you'd probably want to use something like motherboard mosfets or at least irfz44's.
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ZVS capacitor charger
