Infineon, Solum expand cooperation on HVDC power for AI data centers

This partnership marks the inflection point where 800V HVDC transitions from NVIDIA's architectural roadmap to shipping silicon. The intermediate bus converter is the chokepoint: once 800V DC becomes the data center backbone, every PSU, BBU, and IBU must be re-architected around SiC/GaN switching above 900V. This cascades upstream into Wolfspeed and Coherent substrate demand, and downstream into NVIDIA's next-gen GPU power delivery topology. The BBU-semiconductor convergence is the underappreciated signal—energy storage is becoming a chip problem, not a battery problem. Regulatory exposure is asymmetric. EU ErP 2.0's 97.5% efficiency floor at 50% load favors Infineon's German manufacturing proximity, but Solum's US operations subject the joint stack to potential Section 232 scrutiny. CHIPS Act domestic-content mandates risk bifurcating the supply chain. Competitively, TI and onsemi are already qualifying 800V SiC modules; Navitas is pushing GaN at the IBU layer. The structural threat, however, comes from Delta Electronics and Vertiv migrating up-stack into converter design, compressing the middle where this partnership now sits. Within 18 months, two to three hyperscaler design wins will cement 800V as the de facto standard. The 24-month tail points to consolidation: by 2027, the data center power semiconductor market will narrow to three or four dominant players, relegating legacy AC-DC-AC vendors to commodity PSU manufacturing.