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bootstrap capacitor design

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ramuk8avis

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what is the value for Qg and Vmin in the bootstrap capacitor calculation for ir2110 according to the formula given in the forumula inAN 978
THANK YOU
 

Considering IR2110 undervoltage-lockout, the absolute lower bound for Vmin would be the highest VBSUV- value from the datasheet (9.4 V). You may require a higher Vbs voltage in your application for sufficient MOSFET gate drive.

Qgs is read from the MOSFET datasheet (Qgs,tot at the actual gate drive level and bus voltage).
 
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