Re: More SSTC Questions

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>

Hi Matt,

You might check Marco's paper at:

http://personal.inet.fi/atk/dncmrc/slrconv.zip

http://personal.inet.fi/atk/dncmrc/

He give a lot of tips for avoiding burned up silicon.

Cheers,

	Terry


At 10:25 PM 12/26/2001 -0500, you wrote:
>Hi all, I am wondering if a getdrive xfmr is all that neccesary?Can i use a 
>half bridge w/o the stupid transformer?Or is it really that hard to make?
>
>I am still killing mosfets and now 555s!I have tried putting an MOV across 
>the source and drain and still no help.I have tried all the diodes and still 
>no help!?Whats wrong?
>
>I know a half-bridge is better but I REALLY want to make the 555 and 1 MOSFET 
>ciruit work.Success would be full variac voltage(120v) without the parts 
>frying.Now WHY is the MOSFET dying with the diodes in place also?Wont a 
>ultrafast diode stop CEMF?I also have tried the schotty in series with the 
>MOSEFT source and then another ultrafast diode going drain to 
>ground.(Correct?)
>
>I have measured the gate voltage at about 15volts.
>
>What could kill the MOSFET now?CEMF should not be an issue.The internal diode 
>heating should not either.Ugggggggg!!!!!!!
>
>Thanks,
>Matt
>