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TPS51225: bootstrap capacitor selection

Ann_Lien
Genius 10640 points
Part Number: TPS51225

Hi expert,

My customer wants to use 0.22uF as Cboot(Cboot on EVM is 0.1uF). But I didn't see description for Cboot calculation. As I know, risk on larger capacitor is if LS turn on time is enough for charging. Could you kindly help to provide any equation or could you help to confirm if 0.22uF could be used in TPS51225 a Cboot?

Thanks,

Ann Lien