800 V Server Power Supplies

In this webinar, Michael De Rooij, GaN Application Fellow at Efficient Power Conversion (EPC), presents a high-performance 800 V (±400 V) to 12.5 V isolated converter for next-generation server power systems. He explains the cascade input (input-series, output-parallel) architecture using eight interleaved modules, combining a half-bridge primary with a push-pull secondary to cut ripple current, minimize capacitance, and improve thermal distribution. The speaker details the use of low-voltage GaN FETs, the isolation and gate-drive scheme, and measured efficiency above 98%. He concludes by introducing a new 800 V to 50 V, multi-kilowatt, 1 MHz design that doubles power density.

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