PI announces PowiGaN designs for 800 VDC AI data centres
Power Integrations (PI)has introduced two ultra-slim, compact auxiliary power supply reference designs for NVIDIA Kyber 800 VDC AI data centres.
“As the only company offering single-HEMT 1700 V GaN devices, Power Integrations can design these best-in-class, highly efficient flyback converters with a low BOM count while maintaining wide safety margins on an 800 V bus,” said Jason Yan, senior training manager at Power Integrations. “The only alternative solutions are discrete, costly SiC devices which require 30 percent more components and space to operate.”
The single-output, 15 W design is 30 mm x 30 mm with a 7 mm profile, while the isolated, six-rail, 35 W design is only 80 mm x 60 mm with an 8 mm profile. Optimised specifically for the NVIDIA Kyber liquid-cooled, blade-rack architecture, these compact solutions free up approximately 30 percent space on densely packed main power distribution boards (PDBs) with an estimated 30 percent reduction in the BOM count — streamlining design and improving overall reliability.
These designs offer at least 88 percent efficiency across line and load, according to the company.
The newly published design example reports describe 35 W and 15 W flyback auxiliary power supplies for high-voltage AI data centre applications. These PSUs provide power for internal components such as MCUs, gate drivers, and op-amps, which deliver critical “control and housekeeping” functions to ensure reliability, efficiency and system safety.
Both designs are based on Power Integrations’ InnoMux-2 ICs with 1700 V PowiGaN GaN technology. The 1700 V-rated InnoMux-2 IC easily supports 1000 VDC nominal input voltage in a flyback configuration and can deliver flat efficiency of 90 percent in discontinuous conduction mode (DCM) while maximising power delivery.
