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UCC21542: UCC21542DWKR - Bootstrap Capacitor for switching STGP10H60DF IGBT at 60Hz

Part Number: UCC21542

Tool/software:

Hi, I need an isolated gate driver that drives the gate of this IGBT - STGP10H60DF at 60Hz switching frequency. How big should the bootstrap capacitor of UCC21542DWKR be for this case? I think it is very large (>50uF), so is there a workaround for this problem, since I would like to minimize the capacitance of both Cboot and the VDDB decoupling capacitor? Please advise. Thanks!

  • Hello,

    You can use these equations to calculate the necessary minimum Cboot for your application. Please note that this is an absolute minimum, so make sure not to use a capacitor below the calculated value.

    Best regards,

    Will