Tool/software:
The GAN is damaged immediately after it is driven. When checking with a tester after damage, the resistance value between Vcc and GND is low. In what cases would this type of damage occur?
Also, looking at the waveforms, the high-side switching appears to be unstable and malfunctioning.
I don't know if this is related to the damage, but I think there is something wrong with the internal gate driver that is causing the abnormality.
