報告_OCP2026_AdvancedEnergy_800V直供伺服器與電源櫃_20261015

PDF 原檔：報告_OCP2026_AdvancedEnergy_800V直供伺服器與電源櫃_20261015_original.pdf

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圖片清單（已驗證 2026-10-19）

原始內容

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Harry Soin, Senior Director, Advanced Energy Andy Brown, Senior Director, Advanced Energy LVDC direct-to-server and power shelf Challenges and solutions

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• Power conversion in LVDC • LVDC – maximize the benefits • LVDC – Challenges to overcome • LVDC Power conversion • Rack mounted solutions • Board mounted solutions • LVDC Board mounted conversion challenges and proposed resolution • Call to action Agenda Items

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LVDC – Key architectures • 50V : 12V Non-isolated DCDC • LVDC:50V Isolated DCDC • 50V : 12V Non-isolated DCDC • LVDC in/out Hot-swap controller

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• The Motivating factors behind LVDC distribution are well know and documented and is a key enabler to achieve the power- delivery required for next-gen IT racks. • The task is to convert the LVDC to <1V with voltage- conversion steps along the way. The questions are • Where should those voltage-conversion steps happen? • What are the voltage levels that should be used? • The ‘deeper’ the LVDC goes (closer to xPU device), the more benefit is realized. • “deep” means does it remain at the connection point of the equipment or penetrate further into the rack-mounted equipment • The trade-off is that LVDC is more challenging to accommodate the “deeper” it goes into the equipment. LVDC - Distribution and benefits LVDC LVDC : <50V xPU LVDC xPU LVDC/<50V Isolation Isolation <50V distance <50V distance Minimized LVDC distance High-current related losses - Distribution - Connectivity High-current related losses minimized

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• SAFETY • The biggest and most challenging aspect is inherently safe power conversion • Isolation/Insulation does not just apply to cables, bus-bars and connectors • For power-Conversion it applies to • Input-to–output, Input-to-ground and output to ground. • “LVDC” has been adopted by the community to relate to +/-400Vdc or 800Vdc • From the Safety Standards, Low Voltage (LV) is only voltage LESS than 60Vdc; Typically known as ELV or SELV • Voltages that exceed 60Vdc are, by definition HAZARDOUS • WHO are we protecting • Installers, Production Operators and maintenance staff • Production staff of the equipment. Challenges to overcome 5 • Layouts to follow • IEC62368 • IEC60664 • IPC-2221B

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• What about EMI? (THE most common question asked today) • EMI must be considered if the voltage supplies to more than one piece of equipment, and becomes more important with more equipment • 50V systems have been historically limited to how many pieces of equipment supplied over short distances (within 1 IT rack) – Effects of EMI not “so” critical. • Switching frequencies now exceeding 1MHz = lowest conducted-EMI noise limits • Conducted EMI (Rack and BMP) • Particularly important for Scaling Multiple cabinet connections • Radiated EMI (BMP). • Particularly important when deploying BMP power conversion in close proximity to target devices. Challenges to overcome 6

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• Distribution current. • The Lower voltages; keeping the distance that they are supplied as small as possible means less losses and less parasitic effects. • Choosing the right power-conversion steps with corresponding output current is critical for success. • Cooling. • General statement; power conversion architectures are transitioning toward fluid- cooling • Leakage is a tangible reality, and leaking fluid is not desired. Challenges to overcome

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• Option 1 - Rack-mounted • Mt Diablo ( 3 Phase AC to 800V or +/-400V) • Down Conversion ( 800V & +/-400V to 50V) • Can take the advantages of LVDC distribution in the rack • Smaller connectors, cables and bus-bars • Lower conduction losses. • Down conversion Options • LVDC to 50V • The 100KW Power Shelf • The 160KW Power Shelf. LVDC Solutions

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Rack mounted power solutions 9 160KW Power Shelf 100kW Power Shelf PSU Rating 18KW 18kW Input Cable 4x HVDC 6 pin connectors: +400V, -400V, Return, Earth, Sense1 and Sense2 I/P Current : 4x62.5A 2x HVDC 6 pin connectors: +400V, -400V, Return, Earth, Sense1 and Sense2 Shelf output connector Bolted, BK5000 28mm thick : 4kA Bolted, BK2000 Shelf output connector temp monitoring Yes, with thermistor Yes, with thermistor External busbar temp monitoring Yes, with sensing circuit Yes, with sensing circuit Shelf (W x H x D) 855mm x 46mm x 1086mm 537mm x 46mm x 867mm PSU (W x H x D) 83.4mm x 40mm x 680mm 83.4mm x 40mm x 690mm 100kW and 160kW both uses 18kW PSU, Same PMM as HPRv2 160kW 100kW

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LVDC Solutions 10 Hot Swap Controller  Active inrush and discharge with Discharge  Digital Monitoring  Auxiliary Output. Power Distribution Board  The integration of the building blocks  Safety approved, Electrically characterized, EMI-proven.  Includes the hold-up capacitance  Fusing and digital control  Accelerated development speed! 800V to 50V  DCDC modules.  At >98% efficiency  Isolated, non-regulated NIBC 12Vout Bricks  50V connection and systems  Regulated 12V needed with current-sharing Option 2 - PDB

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• Isolated DCDC Power conversion density now exceeding 2000W/in3 • Designs have to provide significant Isolation and Insulation distances. • We have large components to accommodate • Hold-up capacitors • Connectors • EMI filters • Fuses • Other bus voltage • Voltage-transients, short-drop-out of input etc Challenges 11 Hold-up caps are large proportional to time, but will have in-rush to manage Multi-stage EMI filter needed due to power demand and switching frequency Large or many-way connectors required for <50V Large fuses and connector for LVDC rating

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• Input and output voltage is the LVDC • Standard ½ brick size • Controls the INRUSH current caused by the hold-up capacitors on hot-plug of the rack-mounted equipment • Controls the DISCHARGE of the hold-up capacitors on hot-extraction of the rack-mounted equipment • Integrated PTC to support these functions • Provides ISOLATED 12V Auxiliary output for house keeping circuity on the PDB assembly • Provides digital control and monitoring • IDEAL point to monitor and report input voltage and current. • The Unit must be fully thermally managed for fluid-cooled baseplate attachment Hot Swap Controller

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• The DC-DC conversion needs to be Specified as • Power-rated to be convenient building blocks • Standard size, ½ bricks for easy and flexible integration • Input voltage to accommodate all LVDC variations • Output voltage current are 50V or 12V variants. • Reinforced Insulation needed for safety • Isolated for safety • Un-regulated as the LVDC is tightly controlled • High efficiency, >98% efficiency is a must-have • Contact-cooled to fluid-cooled baseplate • Digital control and monitored LVDC input to 50V DCDC BMP • Thermally optimized design for baseplate to be thermally bonded to fluid- cooled cold-plates

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50Vin to 12V BMP • Re-use of existing platforms used in 50V systems • Non-Isolated (ELV input, ELV output) • Regulated required for 12V down-stream use. • Standard ¼ brick modules • Optimized for fluid cooled baseplates • Highly efficient, 98% • Many different power levels available • 900W • 1300W • 1600W • >2500W • Thermally optimized design for baseplate to be thermally bonded to fluid-cooled cold-plates

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• Safety approved sub-assembly • Cooling, thermally optimized and characterized • Power density optimized for DCDC • Fast Time To Market – using Scalable standard building blocks • Control and monitoring – using digital controlled units Challenges Overcome using a PDB sub-assembly. • EMI; Conducted and Radiated. Characterized and approved • Hold-up function sized for the application requirement • Inrush limiting sized for the in-rush • Active-discharging for safe handling of equipment. • Customized packaging of modular building blocks

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AE’s Prototype and Production units LVDC 100KW Power Shelf LVDC 160KW Power Shelf Power Management Controllers Sampling Sampling Sampling • 4KW 50V • 6KW 50V • 3KW 12V HSC module LVDC ; <60Vdc Non Isolated Bus Converters • 900W • 1300W • 1600W • >2500W • 12KW • LVDC-in, LVDC-out Sampling Sampling Sampling

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• Get involved in the Rack and Power Project/Sub-Project Community! • Is there a need for a standardized OCP compliant PDB? • Involvement within the community is key for the success of next generation power specifications. • Defining individual requirements are key to creating an overall industry specification. • Project Wiki with latest specification : https://www.opencompute.org/wiki/Open_Rack/SpecsAndDesigns • Mailing list: https://www.opencompute.org/projects/rack-and-power Call to Action

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Thank You!