Single-stage design removes 48-V bus in servers

A DC/DC power delivery board from Navitas Semiconductor enables direct conversion from 800 V to 6 V in a single stage. Showcased at NVIDIA GTC 2026, the design eliminates the conventional 48-V intermediate bus converter stage within compute server trays, simplifying power delivery for NVIDIA AI infrastructure.

Using GaNFast power ICs, the board reaches 96.5% peak efficiency at full load with 1-MHz switching and a power density of 2.1 kW/in³. The primary side integrates sixteen 650-V GaNFast FETs in DFN 8×8 packages with dual-side cooling in a stacked full-bridge topology, while center-tapped outputs use 25-V silicon MOSFETs. High-frequency switching enables smaller passives and planar magnetics, increasing power density.

The Navitas power delivery board is about 20% thinner than a mobile phone. Its ultra-low profile allows close placement to the GPU board, minimizing loop inductance to improve transient response and power distribution efficiency.

For more information, contact a Navitas representative or email info@navitassemi.com. A timeline for availability was not provided at the time of this announcement.

Navitas Semiconductor 

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