Re: SSTC problem - not plasmasonic :-))

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

Original poster: "Jim Mitchell" <electrontube-at-sbcglobal-dot-net> 

I know the TC4420 doesn't have the enable.  I thought he ment MicroSSTC,  oh
well.
Regards - Jim Mitchell

----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Monday, April 12, 2004 1:53 AM
Subject: Re: SSTC problem - not plasmasonic :-))


 > Original poster: "Dan" <pbursa-at-cfl.rr-dot-com>
 >
 > Jim, check the schematics, microSSTC is a bit different from miniSSTC
LOL
 > TC4420 doesn't have enable function and have only 6A peak drive current
 > while UCC37322 can push over 9A peak. For the Steve's Ward mini SSTC you
 > need enable pin as it is completely different design from microSSTC.
 > Kreso, check datasheet and compare to your setup... There must be
something
 > wrong ... don't you have the chip backwards ? How about proper antistatic
 > handling techniques ? These chips are quite foolproof, I never had
problems
 > with them...
 > Vladan
 >
 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Sunday, April 11, 2004 10:51 AM
 > Subject: Re: SSTC problem - not plasmasonic :-))
 >
 >
 >  > Original poster: "Jim Mitchell" <electrontube-at-sbcglobal-dot-net>
 >  >
 >  > LOL kreso you stole my joke about the plasma sonic :-)
 >  >
 >  > Anyway,  I had trouble with the UCC37322 when I tried to make the
 > microsstc
 >  > so long ago,  try using the TC4420,  also tie pin 3 to VDD through a
.1uf
 >  > cap that might help.
 >  >
 >  > Regards - Jim Mitchell
 >  > ----- Original Message -----
 >  > From: "Tesla list" <tesla-at-pupman-dot-com>
 >  > To: <tesla-at-pupman-dot-com>
 >  > Sent: Saturday, April 10, 2004 7:43 PM
 >  > Subject: SSTC problem - not plasmasonic :-))
 >  >
 >  >
 >  >  > Original poster: Kreso Bukvic <kreso.bukvic-at-kc.htnet.hr>
 >  >  >
 >  >  > I have started building Steve Wards mini SSTC  ! Terry and John gave
 > the
 >  >  > parts. I made evrything until mosfet driver IC-s ( UCC37322/1's )
And
 >  > tried
 >  >  > to connect the power to see if the chips heat or somthing and UCC IC
 >  > popped
 >  >  > on one small hole puncturedon pin 4 ! I checked ALL wiring evrything
 > was
 >  > ok.
 >  >  > Again popped the chips. Now i toke a completly new IC and soldered
only
 >  > the
 >  >  > power supply to it ( 12 V ) I used my handy, expensive, professional
 > bench
 >  >  > SPU ( obviously the problem was not here ) and soldered 4 wires (-
to
 > pin
 >  >  > 4,5) (+ to pin 1,8) ana a capacitor 0.1 uF across the + and -. I
tried
 >  >  > disconnecting the capacitor too but id didnot help a soon i
connected
 > the
 >  >  > psu the IC acts as short circuit. Maximall current draw was set to 1
A
 > i
 >  >  > tried setting it to 100 mA so i do not burn the other IC-s but no
help.
 >  >  >
 >  >  > Here is the setup until now. But any way the chips pop even without
any
 >  >  > other wires connected except PSU.
 >  >  >
 >  >  > http://hot-streamer-dot-com/temp/miniSSTCsch3.jpg
 >  >  >
 >  >  > I hope Stewe wont mind me changing his shematics. Sory Steve
 >  >  >
 >  >  > Best Regards
 >  >  >
 >  >  > Kreso Bukvic
 >  >  >
 >  >  >
 >  >
 >  >
 >
 >