I am working on a proof-of-concept project which requires me to charge a 10uF capacitor to 650V, operating from a 12VDC power source. I was looking at the LT3751, but it appears to only be capable of up to 500V. Are there any other flyback converters which would be capable of doing this, using off the shelf parts? We do not have the capacity at the moment for custom-built transformers. Any help on this would be appreciated.