Can't seem to get high-votage source driver (TD62783APG) working
Vcc must be powered not switched from logic.
The IC was damaged. Perhaps from using a motor then switched off from flyback with this method badly connecting logic input to Vcc.
The driver is rated for 500mA but not all at one time, resistive, not inductive as motors have a resistance 10x lower than rated V/I.
This may work Ok for a tiny 100mA motor only, consider a low side Nch FET with RdsOn much lower than motor coil DCR