Its been a while but once again looking at a HV pulser type application.
It will charge up about 10nF to 2kV with about 1mA. Then keep it toped off as that cap discharges into another capacitive much smaller capacitive load. The 10nF will loose 100V or so then need to be recharged witn 1mA before the next burst.
It need to be a custom approach due to environment constraints. Cost is not a strong consideration but must be reasonable I can use custom transformers etc.
The voltage does need to be variable from 1K to 2K.
no input to output ground isolation required. but sometime the load shorts and the supply must go into current limit and not damage itself when this happens.
looking for small topologies to do this.
1) boost inductor feeding a voltage multiplier (8-10 stage) I have had 1A diodes blow when a previous VM design was shorted from 1.5kV. even with a 100K resistor in series with the output. never investigated jsut sured up the source of the arcing and moved on with fingers crossed. 2) flyback to do most of the boost with a doubler or tripler on the output. This should keep the turns ratio reasonable.3) straight pushpull making use of the primary voltage doubling action to get soem volatge gain. PWM the center tap.
any other physically small power stage topologies to look into?
thanks