The 6FHS0660MC1G15V-Y0101 is a high-performance digital driver core developed by Firstack for ANPC 3-level system. The driver adopts CPLD as the digital control core, with complete protection functions and built-in fault management system, which uploads the converter's operating state to the master computer in real time, providing support for "big data management" for the failed converter site. Perfectly solving the two major problems of "turn-off timing sequence" and "large commutation circuit