Boost converter efficiency

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Mira7

Joined Jun 26, 2013
10
This boost converter has served we well while conducting low voltage experiments. Now I need to do experiments with higher voltage. I would like to charge the 10uF capacitor to about 250V within a reasonable amount of time, say a few seconds. The boost converter will not charge above 54.4V. What changes can I make to achieve the desired voltage?
 

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