Compact, low-profile designs use highly integrated, 1700 V-rated PowiGaN™ single-HEMT ICs to save space, simplify designs, improve reliability, and reduce the BOM count, achieving 88 percent efficiency.
Power Integrations introduced two new ultra-slim, compact auxiliary power supply reference designs for 800 VDC AI data centers. The single-output, 15 W design is only 30 mm by 30 mm with a 7 mm profile, while the isolated, six-rail, 35 W design is only 80 mm by 60 mm with an 8 mm profile. Optimized specifically for the NVIDIA Kyber liquid-cooled blade-rack architecture, these ultra-compact solutions free up approximately 30 percent of 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 are highly efficient with at least 88 percent efficiency across line and load.
“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 silicon carbide (SiC) devices, which require 30 percent more components and space to operate.”
The newly published design example reports describe 35 W and 15 W flyback auxiliary power supplies for high-voltage AI data center applications. These compact power supply units (PSUs) power 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, featuring 1700 V PowiGaN gallium nitride (GaN) technology. The 1700 V-rated InnoMux-2 IC easily supports a 1000 VDC nominal input voltage in a flyback configuration and delivers a flat efficiency of 90 percent in discontinuous conduction mode (DCM) while maximizing power delivery.
