(P12-6) 5.6kW M-CRPS PSU for AI Server reaching 170W/in3 and 98%+ efficiency

Artificial intelligence computing is rapidly increasing server power demand across data centers, enterprise infrastructure, and edge AI deployments, making modular common redundant power supplies (M-CRPS) essential for constrained rack environments. This presentation introduces Infineon’s 5.6 kW M-CRPS reference design, targeting 170 W/in³ and an estimated peak PSU efficiency of 98%+ through a three-level flying-capacitor totem-pole PFC stage and an isolated GaN-based LLC converter. Integrated magnetics and advanced SiC, GaN, and silicon power devices reduce conversion losses and free valuable space for optimized cooling and component placement. A bidirectional active energy buffer further supports a 12 ms hold-up target while substantially reducing the required electrolytic capacitance.