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The power supply pins of U1 are missing from the schematic.
Is the input voltage 12 V or 13.1 V or 53V? This devices works only up to 18 V.
Hi Jimmy,
The maximum input voltage for the CD4047B is 18V. I would not recommend exceeding that, as it could immediately and permanently damage the device.
Also, the outputs probably won't drive enough current to replace a gate driver. I would recommend using an actual gate driver between the CD4047B and the driver MOSFETs.