Power Integrations (PI) has announced two ultra-thin, compact auxiliary power supply (PSU) reference designs built for 800VDC AI data centers. PI principal training engineer Jason Yan said the ultra-compact solution, designed for Nvidia Kyber liquid-cooled blade-rack systems, uses a highly integrated GaN design that saves 30% of PCB space and reduces component count by 30% compared with conventional silicon carbide (SiC) solutions.