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Bootstrap Capacitor calculation

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saghae

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bootstrap capacitor calculation

Hi, All
I use IR2110 that needs a bootstrap capacitor for driving MOSFET/IGBT
My IGBT is 12N60A4D ,Voltage rail is 311 V
topology is full bridge
who can calculate this capacitor ?
I read AN978.pdf and dt98.pdf but i think , i don't calculate it good and carefully.
so i want help me.
very thanks.
 

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