Power Integrations, one of the leaders in high-voltage integrated circuits for energy-efficient power conversion, on June 1st introduced two new ultra-slim, compact auxiliary power supply reference designs for 800 VDC AI data centres. 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. Optimised specifically for the NVIDIA Kyber liquid-cooled, blade-rack architecture, these ultra-compact solutions free up approximately 30 per cent 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 per cent 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 per cent 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 centre applications. These compact power supply units (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 gallium-nitride (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 per cent in discontinuous conduction mode (DCM) while maximising power delivery.
Resources
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 centres.
- 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 centres.
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