C frac22Qg fracIqbs(max)f Qls fracIcbs(leak)fVcc - Vf - VLS - VMin.Does the capacitor need to be bigger than this in practice If so, is there a rule of thumb saying how big Is there a drawback to having a large bootstrap capacitor.This should be in the data sheet but Id ot expect it to be 1V and maybe much less.Too high and some FETs will start to turn on (only ones wity very low Vth).
Thats for the 20 kHz side presumably. Hz side will be much smaller I think. As they note - only wity Al caps do you ned to worry about leakage. Provide details and share your research But avoid Asking for help, clarification, or responding to other answers. Making statements based on opinion; back them up with references or personal experience. MathJax reference. To learn more, see our tips on writing great answers. Not the answer youre looking for Browse other questions tagged capacitor mosfet datasheet or ask your own question.
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