During PCIM Europe 2025 in Nuremberg, Han Cui gave a poster presentation about replacing SiC switches with 1700 V GaN devices in high-input voltage industrial applications. The world's first 1700 V GaN switch is now available in a new member of the InnoMux-2 flyback switcher IC family. In less than two years, Power Integrations has delivered three voltage-rating breakthroughs with its #PowiGaN technology, from 900 V to 1250 V, and now 1700 V. 

For industrial applications requiring high-input voltages, silicon carbide (SiC) switches have traditionally been the go-to choice, especially for voltages up to 1000 V. However, the new high-voltage GaN technology offers possibilities for higher efficiency and reduced system cost. This paper focuses on optimizing efficiency and output regulation for a 60 W single-stage flyback power supply featuring dual outputs that offer better than ±1% regulation across a wide input voltage range of 300 VDC.