Hi all, I am trying to make a full bridge inverter for this, I am using the IR2110 controller and the Mosfet IRF 540, but I don't know how to calculate the starting capacitor, I have followed a guide to calculate this, but I am in doubt. VLS appears in the formula = Voltage drop across the low side FET (or Load for a high side driver), but I don't know where to look it up in the datasheet or where I can look at this. as well as VMin = Minimum voltage between VB and VS, I would appreciate your help, thank you very much I follow the dt98-2a-Bootstrap Component Selection For Control IC's guide.
The frequency I am using is 25KHz but my question is how do I see or where do I find Vls and Vmin according to that formula in which part of the tab or how, thanks
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- gate driver ics
Thanks to google translation I can understand your question in Spanish.
We have another AN which explains bootstrap circuit calculation with examples:
Very common range of values for Cboot is between 1 - 10uF for 25kHz switching, you can also choose 2uF or 3uF, every capacitor should work just fine.
Thank you very much I was sure I had written it in English, I have changed it.
I saw your answer, thanks for the information you provided, but by any chance do you know about vls and vmin in the above document, I don't want to be left with that doubt of how to get those values or in which part of data sheet I can find them.
Anyway I will follow the guide you sent me, but if someone knows is open the question, thank you
VLS is the max. voltage drop of the low side switch when it is on, i.e. VCEon in following circuit.