(P12-8) Active Thermal Balancing for Multiphase Buck Converters in Data Center Applications

In recent years, AI GPU and ASIC power consumption has been rapidly growing, forcing designers to increase the number of phases in buck converter PoL (Point of Load). With more phases, the thermal gap between them becomes harder to control due to tradeoffs in thermal design. Consequently, one or more phases may reach their thermal limit limiting full potential. To address this limitation, MPS introduces Active Thermal Balance (ATB), which enables communication between the power stages and dynamically adjusts the current of individual power stages, equalizing their junction temperatures without external sensing or redesigning of the thermal spreader.