Power Integrations has introduced two new ultra-slim auxiliary power supply reference designs developed for 800 VDC AI data center applications. The designs are optimized for NVIDIA’s Kyber liquid-cooled blade-rack architecture and are intended to reduce space requirements, simplify system design, and improve reliability in high-voltage AI infrastructure.

The first design is a single-output 15 W auxiliary power supply measuring just 30 mm × 30 mm with a profile height of 7 mm. The second is an isolated six-rail 35 W design measuring 80 mm × 60 mm with an 8 mm profile. According to Power Integrations, the compact solutions can free up approximately 30% of board space on densely populated main power distribution boards (PDBs) while reducing bill-of-materials (BOM) count by an estimated 30%, contributing to simplified designs and enhanced system reliability.

Both reference designs achieve efficiency levels of at least 88% across line and load conditions.

“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% more components and space to operate.”

The newly released design examples describe 35 W and 15 W flyback auxiliary power supplies intended for high-voltage AI data center environments. These compact power supply units provide power for internal system components such as microcontrollers, gate drivers, and operational amplifiers that perform essential control, monitoring, and housekeeping functions required for system safety, reliability, and efficiency.

Both designs are based on Power Integrations’ InnoMux™-2 ICs incorporating 1700 V-rated PowiGaN™ gallium nitride technology. The InnoMux-2 devices support nominal input voltages up to 1000 VDC in a flyback topology and can deliver up to 90% flat efficiency in discontinuous conduction mode (DCM) while maximizing power delivery performance.

Power Integrations has made both reference designs available for download:

• DER-1110 – a 35 W multi-output flyback auxiliary power supply based on the IMX2353F, designed for high-voltage AI data center applications.

• DER-1114 – a 15 W single-output flyback auxiliary power supply based on the IMX2353F, also targeted at high-voltage AI data center applications.

The new designs leverage Power Integrations’ 1700 V PowiGaN technology to deliver compact, low-profile auxiliary power solutions for emerging 800 VDC AI data center architectures.

Original – Power Integrations