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Registered Member #1875
Joined: Sun Dec 21 2008, 06:36PM
Location:
Posts: 635
I have a circuit modeled after steve ward's mini sstc and I have a problem with the ucc3732x circuit. I have 1 and 8connected to 12v and 4 and 5 to gnd, and 6 and 7 to my transformers, along with the capacitors. The secondaries are open and I have no signal to 2 or 3, but when I apply power they burn out. I have no clue what the problem is. Thanks.
Registered Member #1845
Joined: Fri Dec 05 2008, 05:38AM
Location: California
Posts: 211
You will have to drive them with a load, have your GDT connected to both the UCCs and FETs, and the fets needs to be installed in their bridge too.
I have my GDT connected the UCC's and FETS, and the FETS are installed in the bridge, and I still burnt the secondary on the GDT when I applied power to the bridge.
Registered Member #1739
Joined: Fri Oct 03 2008, 10:05AM
Location: Moscow, Russia
Posts: 261
naah, believe me or not I used a GDT as a signal xformer in the older versions of my coil, meaning it was driven by two UCCs and kept sending signals to the bridge drivers and remained relatively loadless - still nothing ever blew.
If there is no input applied I guess the drive entered a self-ocillation somehow, ground pins 2 for sure.
Registered Member #1875
Joined: Sun Dec 21 2008, 06:36PM
Location:
Posts: 635
All I did was connect 1 and 8 to 12v and 4 and 5 to gnd... The weird thing is that one day it was fine, then when I staced ICs in parallel it went wacky and ended in catastrphic failure. I had the output clamped to 12v and gnd with antiparallel diodes- and I think they might have been destroyed (before I destroyed them removing them)... Could these be a problem?
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gdt driver burning out
