Why AI Racks Need Dual-Side-Cooled GaN: The Power Bottleneck Moves onto the Board
At first, a new 650V GaN device sounded like a component-level detail in the AI boom. Then the target application made the point much clearer: an 800V intermediate-bus converter sitting between high-voltage distribution and the low-voltage rails that feed an AI rack. Renesas says its new device uses dual-side cooling in an 8×8 mm package because designers of megawatt-scale racks are running out of board area and thermal headroom before they run out of ambition. That is a useful reframing. The power bottleneck is not only at the grid connection or the data-center fence; it is also on the board that must turn incoming power into usable accelerator power. The question is not whether one GaN package “solves” AI electricity demand. It is whether it gives a rack designer enough thermal and layout margin to make the next power architecture practical. Previous Tech(EN) post: Oracle’s Point Beach Power Commitment: Who Pays for AI Data Centers? Key Takeaways Renesas introduced...