![]() ![]() I have built the circuit in real life and tested capacitors I had on hand and they all worked fine, I just want to know if I can buy smaller / I got very frustrated trying to solve this equation as it is poorly defined and I was getting illogical answers. This its self is not the issue(unless I am wrong in my assumption) the issue is if I for example have Vcc = 15V and Vf = 0.7V that would give me a negative value in the denominator and thus a negative capacitance overall.Īs a second smaller question while I am here, what is Vmin in this case? does it have to do with under voltage specification between these two pins on the IC or is it simply 0V? If I am inverting 100V that means Vls would 100V? because that would be the drop across the lowside FET as its S is connected to ground. ![]() What I am not getting are the values of Vls and Vmin. I have included the equation by IR's application notes. I am trying to calculate the minimum capacitor size in a bootstrap for an IRS21867 gate driver. ![]()
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