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Data centers Gerald Deboy got his M Sc and Ph Ddegrees in physics from the Technical University Munich Germany In 1994 he joined Infineon Technologies AG Neubiberg Germany later moving to Infineon Technologies Austria AG Villach where he is Head of the Systems Innovation Group for Power Discretes and System Engineering as Distinguished Engineer and since last year as Fellow He has authored and coauthored over 130 papers in national and international journals as well as contributing to student textbooks He holds more than 100 international patents and with David James Coe and Tatsuhiko Fujihira is the inventor of the superjunction principle which revolutionised energy savings in highvoltage switching converters Its use from laptops to EV charging stations has likely saved over 3 4 trillion kWh to date Dr Deboy what do you think of the current challenges in power distribution and conversion for hyperscale data centers? The challenges start with keeping the power distribution losses down at the higher power requirements of newer motherboards which are already typically at 6 to 8 kW This is mandating a 48 Vbackplane compared to the traditional 12 Vecosystems This helps us to decrease losses 16-fold but it results in needing a first stage of conversion to an intermediate bus before converting again at the processor At the same time the higher transient requirements with much higher load currents of those processers with 100s of cores are driving the optimal intermediate bus voltage further down To this end at Infineon we are already providing hybrid magneticallyand capacitivelycoupled switch converters to transform to intermediate bus voltages at 6 or 8 V The 6 or 8 Vlevels do have the advantage of reducing switching losses compared to 12 V This enables higher switching frequencies which further helps to better cope with the Challenges and solutions for powering the latest processor generations in hyperscale data centers An interview with the PCIM Europe keynote speaker Dr Gerald Deboy Fellow Infineon Technologies Austria AG Villach Austria As AI models increase in size and complexity training them is requiring more power per motherboard and per rack At the same time parallel processing by GPUs and TPUs – with 500 cores and more – means high operating currents and very steep transient loads In short the rise of AI data centres is as much a challenge for the power supply system as it is for processing power Tackling this will be the topic for Dr Gerald Deboy in his keynote speech at this year’s PCIM Europe Im ag e Em m aS to ck – Ado be Sto ck 6 PCIM Magazine 01 2024