The forward voltage of the Nichia is low enough you might have blown the led with the FET driver. Look at the graph on this thread. For your sake I hope not but if that is in fact the case you need an emitter with higher Vf for direct drive.
The forward voltage of the Nichia is low enough you might have blown the led with the FET driver. Look at the graph on this thread. For your sake I hope not but if that is in fact the case you need an emitter with higher Vf for direct drive.