Power Integrations has introduced two ultra-compact auxiliary power supply reference designs tailored for 800 VDC AI data centers, where space and efficiency are at a premium.
The lineup includes a single-output 15 W design measuring just 30 mm × 30 mm with a 7 mm profile, and a more advanced isolated 35 W design with six output rails, sized at 80 mm × 60 mm and only 8 mm high.
Both are optimized for NVIDIA’s Kyber liquid-cooled blade-rack architecture and are designed to reclaim valuable board space freeing up roughly 30% on densely populated power distribution boards (PDBs).
At the same time, they reduce bill-of-materials (BOM) count by about 30%, simplifying design and improving system reliability. Efficiency remains strong, exceeding 88% across varying line and load conditions.
The newly released reference designs detail flyback-based auxiliary power supplies that support critical “housekeeping” functions within high-voltage AI data centers. These include powering components such as microcontrollers, gate drivers, and operational amplifiers, all essential for maintaining system stability, safety, and efficiency.
Both designs are built on Power Integrations’ InnoMux-2 ICs, which leverage 1700 V PowiGaN gallium nitride technology.
This high-voltage capability allows the devices to handle nominal inputs up to 1000 VDC in a flyback configuration. Operating in discontinuous conduction mode (DCM), the platform can achieve up to 90% efficiency while maintaining consistent performance and maximizing power delivery.
These designs can be downloaded for free from power.com:
- DER-1110 – this design uses the IMX2353F to deliver a 35 W, multi-output flyback PSU for auxiliary power supplies used in high-voltage AI data centers.
- DER-1114 – this design uses the IMX2353F to deliver a 15 W, single-output flyback PSU for auxiliary power supplies used in high-voltage AI data centers.
Leadership Comment
“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.”
For further information, contact a Power Integrations sales representative or one of the company’s authorized worldwide distributors, DigiKey, Newark, Mouser and RS Components,
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