Hi Chris,
Please refer to section 7.3.2.1 of the datasheet. It appears the bootstrap capacitor is being depleted. Increasing the bootstrap cap and adding a 5 Ohm series resistor between the 12V supply and GVDD_X should help.
Please refer to section 7.3.2.1 of the datasheet. It appears the bootstrap capacitor is being depleted. Increasing the bootstrap cap and adding a 5 Ohm series resistor between the 12V supply and GVDD_X should help.