80V MOSFET for DC-DC power in AI server
The latest 80V MOSFET from Infineon Technologies has been designed into the DC-DC bus converter stage of an AI server platform.
The move provides an efficiency increase of around 0.4 percent, which may not sound that much, but saves around 4.3 W per kW of load. At the system level, this leads to significant energy savings when scaled across server racks or entire datacentres. Scaling this across a hypothetical hyperscale datacentre with 2,000 racks would result in over 1.2 MWh in energy savings every hour.
As graphics processing units (GPUs) keep getting more powerful, so do the power requirements at the board level. Intermediate bus converters (IBCs) – which convert for example a 48 V input voltage to a lower bus voltage – are becoming more important for energy efficiency, power density, and thermal performance in AI data centres.
The OptiMOS 6 80V power MOSFETs is housed in a 5×6 mm² dual side cooling (DSC) package and supports hard switching topologies and high energy efficiency due to lower conduction losses. The package also enables cooling on both sides, which contributes to improved thermal management and higher power density – both crucial in AI server environments with limited space.
About 30 percent of the heat generated on the MOSFET die is transferred through the top and less heat is transferred to the PCB. This allows the PCB runs cooler at the same power dissipation for improved reliability, or more power can be handled by the MOSFET for higher power density.
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