Uploaded April 2024 | Updated September 2026, 2 weeks ago
Check out stevehv.4hv.org/drsstc_design.htm to understand this driver better. There is nothing specifically catered to QCW with this driver, it's just what I'm using because it has always worked well for me.
It's also a lot less expensive to build than buying a UD driver or clone.
I'm using an A3120 at the interrupter input. It's powered from the 15v rail and uses a 270 ohm resistor in line with the emitter which is powered straight from the interrupter output. The output from the opto gets clamped to ~5V through the 1K resistor into input 5 of the schmitt trigger just like in Steve's circuit.
The gate drivers I'm using instead of just UCC2732X's are the IXDD614CI's.
They seemed to work fine for my dual H-bridge of the 60N65's. If you really wanted to beef it up you could use the 30A drivers at 24V and ratio the GDT.
I'm going to try a 5A switching regulator at 18V to power the IXDD's. The CT's will also be small T37 cores.
There are a couple smaller variations of QCW I'm going to try both half and full bridge but I'll just use what's basically Steve's 'Mini SSTC' driver and not worry about OCD. Got to do the finishing touches on wiring this one up and will probably give it a test run next couple of days.
Check out stevehv.4hv.org/drsstc_design.htm to understand this driver better. There is nothing specifically catered to QCW with this driver, it's just what I'm using because it has always worked well for me.
It's also a lot less expensive to build than buying a UD driver or clone.
I'm using an A3120 at the interrupter input. It's powered from the 15v rail and uses a 270 ohm resistor in line with the emitter which is powered straight from the interrupter output. The output from the opto gets clamped to ~5V through the 1K resistor into input 5 of the schmitt trigger just like in Steve's circuit.
The gate drivers I'm using instead of just UCC2732X's are the IXDD614CI's.
They seemed to work fine for my dual H-bridge of the 60N65's. If you really wanted to beef it up you could use the 30A drivers at 24V and ratio the GDT.
I'm going to try a 5A switching regulator at 18V to power the IXDD's. The CT's will also be small T37 cores.
There are a couple smaller variations of QCW I'm going to try both half and full bridge but I'll just use what's basically Steve's 'Mini SSTC' driver and not worry about OCD. Got to do the finishing touches on wiring this one up and will probably give it a test run next couple of days.
