Shenzhen Mingjiada Electronics Co., Ltd. supplies the Delta Q50SN12072 industrial-standard 1/4-brick isolated LLC resonant IBC power module, specifically designed for 48V-to-12V power supply applications in high-density servers for AI computing and cloud computing.
With the rapid development of artificial intelligence computing clusters and cloud computing data centres, high-density servers and AI accelerator card clusters have placed revolutionary demands on power supply systems in terms of power density, conversion efficiency, stability and integration. Traditional power supply solutions suffer from issues such as bulky size, low energy efficiency, poor load adaptability and significant thermal management challenges, making them ill-suited for powering high-density computing equipment within 48V high-voltage busbar architectures. As an industrial-standard 1/4-brick isolated LLC resonant IBC power module, the Delta Q50SN12072 precisely addresses the core power supply requirements of next-generation AI computing and high-density cloud computing servers. Tailor-made for the mainstream 48V-to-12V power supply architecture, it has become a core component in the distributed power supply systems of high-end data centres, thanks to its advanced topological architecture, extreme power density and industrial-grade reliability.
I. Core Positioning and Architectural Advantages of the Q50SN12072
The Delta Q50SN12072 strictly adheres to the industrial standard 1/4-brick packaging specifications. With its compact dimensions and high level of integration, it perfectly meets the high-density layout requirements of server PCBs, effectively reducing the space occupied by power supply modules and reserving ample hardware space for server computing chips, graphics memory and peripheral expansion. The module employs a cutting-edge LLC resonant + IBC isolation hybrid topology, which, unlike traditional hard-switching power supply topologies, addresses industry challenges such as high-frequency switching losses, voltage fluctuation interference and insufficient isolation safety at the architectural level.
Specifically, the LLC resonant topology enables soft-switching operation across the entire load range, significantly reducing switching losses during turn-on and turn-off whilst suppressing high-frequency electromagnetic interference; the IBC isolation architecture provides complete electrical isolation between input and output, offering exceptional resistance to surges and voltage differential shocks, whilst completely isolating the impact of 48V bus-side voltage fluctuations and harmonic noise on downstream 12V load equipment, thereby perfectly meeting the high-precision and high-stability power supply requirements of AI servers. This module is specifically designed for scenarios involving the conversion of a data centre’s 48V DC bus to a centralised 12V power supply for servers, and is the preferred secondary power supply solution for next-generation high-density computing servers, cloud computing rack servers and AI training clusters.
1. Key Specifications
Model: Q50SN12072RNDHQ, Q50SN12072
Input Specifications: Compatible with a wide DC bus voltage range of 38–60 V; maximum input current 26 A
Output Specifications: Stable output of 12 V/72 A; total power up to 864 W
Dimensions: 58.48 × 36.94 × 11.56 mm; weight: just 71 g
Key Features: Equipped with a comprehensive PMBus digital monitoring system; supports capacity expansion via parallel connection of multiple units; capable of withstanding the demanding conditions of 24/7 full-load operation in data centres
2. Analysis of the Internal Design
This module utilises an integrated solution from Infineon to achieve highly efficient and stable power conversion:
Main control chip: The Infineon XDPP1100-Q024 digital power controller, featuring a built-in Cortex-M0 core, is responsible for LLC resonant control, synchronous rectification timing, PMBus communication and system protection.
Power MOSFETs: The LLC half-bridge utilises four Infineon OptiMOS 5 series MOSFETs (models BSC050N10NS5 and BSC052N08NS5), whose ultra-low on-resistance of 5 mΩ effectively reduces power losses.
Thermal Design: The rear of the module is fitted with an aluminium alloy heat sink, with thermal compound filling the gap between the PCB and the heat sink to ensure reliable operation under high-power conditions.
II. Core Performance Parameters and Power Supply Capabilities of the Q50SN12072
Addressing the operational characteristics of AI computing equipment—which involve high loads, high instantaneous currents and continuous full-load operation—the Q50SN12072 incorporates Delta’s proprietary power devices and optimised circuit design, with core power supply performance fully tailored to the demands of high-end computing scenarios. The module supports a standard 48V DC input, accommodating the mainstream 40–60V wide voltage input range found in data centres. It can handle voltage deviations caused by bus voltage fluctuations and load switching, adapting to complex data centre power supply conditions whilst stably outputting a standard 12V industrial voltage to meet the rated power requirements of core components such as server motherboards, CPUs, GPUs and AI accelerator cards.
In terms of power output, the module achieves ultra-high power density through its compact 1/4-brick form factor, breaking through the power limitations of traditional power supplies of the same size. It supports the simultaneous full-load operation of multiple chips in high-density servers, effectively resolving the challenge of power supply for high-power-consumption AI computing clusters. It delivers outstanding conversion efficiency under full-load conditions and maintains high energy efficiency across the light-load, full-load and overload transition ranges, significantly reducing the data centre’s PUE and lowering long-term energy consumption costs, thereby aligning with the trend towards green, low-carbon and energy-efficient data centres. Furthermore, the module features extremely low output ripple and noise, coupled with high power supply accuracy, effectively preventing computational errors in AI chips and equipment downtime caused by voltage ripple, thereby ensuring the continuity and stability of AI model training and cloud computing data processing.
III. Q50SN12072 Scenario-Specific Design: Tailored to the High-Density Power Supply Requirements of AI and Cloud Computing
Currently, AI computing servers and high-density cloud computing servers generally adopt a tiered, distributed power supply architecture, with a front-end 48V bus and secondary 12V power distribution having become the industry standard. Delta’s Q50SN12072 has undergone comprehensive, dedicated optimisation for this scenario, maximising its suitability for these applications.
Firstly, high-density integrated design. The compact, standardised 1/4-brick form factor supports parallel and stacked installation of multiple modules, adapting to high-density server board layouts. It meets the requirements for multiple power supply redundancy and power expansion within a single unit, whilst complying with installation specifications for ultra-high-density computing racks. Secondly, adaptation to high dynamic loads. AI computing equipment is characterised by sudden changes in instantaneous load and high peak power consumption. Leveraging the dynamic response advantages of the LLC resonant topology, the module can rapidly adapt to load switching without voltage drops or output oscillations, ensuring power supply stability during sudden high-load operation of computing equipment. Thirdly, it is optimised for long-term continuous operation. Cloud computing and AI training clusters typically operate in a 24/7 uninterrupted mode. The module has undergone industrial-grade ageing tests and supports long-term continuous operation at full load, eliminating issues such as energy efficiency degradation and performance fluctuations caused by prolonged operation. Fourthly, ease of integration and operation and maintenance. With standardised pin definitions and a universal mounting structure, it is compatible with mainstream server power module architectures, enabling rapid adaptation to the iteration and upgrading of both new and legacy equipment, thereby reducing data centre hardware retrofitting and operational costs.
IV. Q50SN12072 Industrial-Grade Reliability and Safety Protection System
As an industrial-grade power supply module, the Q50SN12072 features a comprehensive safety protection and reliability assurance system, designed to withstand the demanding operating environments of data centres. The module offers robust electrical isolation with high insulation strength between input and output, effectively resisting electrical interference such as static electricity, surges and lightning strikes, thereby ensuring the electrical safety of equipment and the data centre.
It also integrates multiple intelligent protection mechanisms, covering input overvoltage and undervoltage protection, output overcurrent, overvoltage and short-circuit protection, as well as high-temperature overheating protection and power current limiting protection. In the event of abnormal operating conditions, it responds rapidly to provide precise power cut-off protection, preventing the destruction of load equipment and damage to the module, whilst significantly enhancing the system’s fault tolerance. In terms of environmental adaptability, the module supports operation across a wide temperature range and is suitable for data centre environments characterised by high temperatures, confined spaces and high-load heat dissipation requirements. Combined with an optimised thermal conduction and heat dissipation structure, it ensures uniform heat transfer and high cooling efficiency, thereby eliminating issues such as power derating and shutdown caused by high temperatures. Furthermore, the module has obtained multiple authoritative certifications from the industrial and data centre sectors. All components are manufactured using high-specification industrial-grade materials, offering excellent resistance to ageing, vibration and damp heat. With a service life far exceeding that of standard commercial power modules, it fully meets the core requirements for long-term, stable operation in large-scale data centres.
V. Application Value and Industry Advantages of the Q50SN12072
Compared to traditional 48V-to-12V power modules, the Delta Q50SN12072, through topological innovation, process upgrades and scenario-specific optimisation, offers five core advantages: high power density, ultra-high energy efficiency, high stability, high integration and high reliability. In AI computing and cloud computing scenarios, this module effectively enhances the overall energy efficiency and stability of server power supply systems, reduces data centre energy consumption and operational costs, and improves the operational efficiency and uptime of computing equipment.
As a flagship product from Delta, which has specialised in the data centre power supply sector, its standardised 1/4-brick design and mature LLC resonant IBC isolation architecture not only ensure the product’s versatility and compatibility but also achieve a breakthrough in performance. It is perfectly suited to high-end applications such as next-generation high-density AI computing servers, cloud computing racks, supercomputing clusters and edge computing nodes, making it a core power supply solution that helps data centres achieve energy savings, cost reductions, computing power upgrades and architectural evolution.
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