I'm currently designing an high voltage DC/DC converter, from a linear technology app-note. My goal is to bias an avalanche photodiode with 200 to 300V, on a small educational satellite. I picked the circuit from figure 16, at page for that.
My issue is that I cannot find a suitable 10uF, 400V capacitor. Aluminum electrolytic are not good for space, stacked ceramic are huge (like this one). Also, I would like to have proper derating, at least 500V.
- Did I miss some option while picking a capacitor?
- Can I get away with smaller values, like 5.2uF?
- I can put inductors, up to 10000uH. Could I add an inductor after the diode bridge and reduce the size of the capacitor safely? Will the impact on the feedback stability be strong?
I'm also interested in any alternative design for an high voltage, low noise converter.
Thanks for your time.