[TCML] Driving a flyback off of mains gate drive woes.

[Scott Bogard <sdbogard@xxxxxxxxx>]

Greetings all,
     Back up to my old tricks again.  After procuring a schematic for a 
PVM 400 flyback driver, and noticing it runs off of mains voltages, I am 
attempting to create my own version, with programmable adjustable duty 
cycle and frequency.  What I don't seem to know how to do, is drive the 
gates, what I have is an ATmega chip producing a nice 5 volt square 
wave, of variable duty cycle and frequency (3-300 kHz) and some good 
flybacks.  Obviously I cannot just plug that 5 volt signal into a bunch 
of MOSFET gates, it would likely not have the guts to hold them open, 
even if it was the correct ground, which it is not.  So basically what 
hardware is needed, a gate drive transformer?  MOSFET driver?  Could 
somebody please point me to some straightforward literature about 
biasing MOSFETS, and possibly provide part numbers, not just reference 
"generic BJT."  I know it must be possible, people have run solid state 
TCs off of MOSFETs for a long time, so what am I missing...  Thanks in 
advance, I'm looking specifically to run it off of about 320V DC 
(+-160V) low side drive (not half or full bridge) if that makes a 
difference.

Scott Bogard.
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla