Patrizio Vinciarelli
Analyst
So multi-phase systems have challenges. And those challenges get compounded in a VPD type of solution. So the underlying primary challenge of multi-phase is that it is a lower current density type of solution. It involves the averaging down of a voltage to step up the current through switching elements that need to support a much higher voltage withstand, and do so reliably and without a well-safe operating area. Then with a Vicor current multiplier, which can, in effect, multiply current and do so much more efficiently, with lower voltage semiconductors without commensurate safe operating area challenges. There are benefits there to do, in particular, just to give you some examples, with the fact that without our proprietary approach, there is no multi-phase. Each one of which, should it fail, could take a GPU or the AI processor with it, as it can fail with a top switch short, which could happen with any of a larger multiplicity of phases. So, we have many, many advantages in terms of the power distribution architecture, the topology, the type of components that these solutions require, which are fundamentally different. But then getting back to the VPD side of things, with a multi-cell approach involving a multiplicity of phases as opposed to a multiplicity of current multipliers, as we have, you have, in effect, the compounded challenge of a power conversion topology, back-converter, which is nearly low current density, compounded by the mechanical challenges with first-generation VPD of stacking this multi-cell topology with gearboxes or capacitive layers that are required in order to provide filtering and dynamic response. And only to get too technical with this, getting to the punchline, VPD, first-generation VPD implemented with multi-cell solutions in the form of multi-phase is very, very challenging, costly, not truly scalable, immediately handicapped, and in need of an overhaul. And we're not seeing, based on our visibility, it being scaled up with the level of load effect rates and manufacturability that larger EMs would expect to have.