company blog about Mingjiada Electronics Supplies AI Server Power Supplies: AC/DC Converters, DC/DC Converters, and SiC/GaN Power Devices

I. Explosive Growth in AI Computing Power Drives a New Revolution in Power Supply Architecture

With the accelerated deployment of NVIDIA’s GB200, GB300, and Rubin series AI server platforms, power density per rack is surging from the traditional 10–20 kW to 100 kW and even beyond 600 kW. The power supply requirements of AI GPUs are characterized by three key features: “high current, low voltage, and fast transients.” Traditional power supply architectures can no longer meet these demands, and next-generation AI server power systems are rapidly evolving toward High-Voltage Direct Current (HVDC) combined with high-density DC/DC conversion and third-generation semiconductors (SiC/GaN).

Against this backdrop, AC/DC converters, DC/DC converters, and SiC and GaN power devices have become the core components in the AI server supply chain with the highest demand and the tightest lead times.

Shenzhen Mingjiada Electronics Co., Ltd. (hereinafter referred to as “Mingjiada Electronics”) has been deeply involved in the electronic components supply chain for many years. The company offers a full range of brand-new, genuine, and in-stock components required for AI server power supplies, covering AC/DC converters, DC/DC converters, SiC (silicon carbide) power devices, and GaN (gallium nitride) power devices, helping AI data center customers shorten procurement cycles and ensure project delivery.

II. AC/DC Converters: The “First Stage” of AI Server Power Supplies

AC/DC converters (rectifiers/front-end power modules) are responsible for converting mains AC power into DC bus voltage and constitute the first stage of AI server power supply systems. As AI data centers evolve from traditional UPS architectures to 800V HVDC power supply architectures, demand for high-power, high-efficiency AC/DC rectifier modules has experienced explosive growth.

Mingjiada Electronics’ AC/DC Converter Product Lines:

High-Power Front-End Rectifier Modules: Power ratings ranging from 3 kW, 5.5 kW, 8 kW, 12 kW, and above, with efficiencies as high as 96%–98%, suitable for AI data center power shelf applications;

800V HVDC Architecture AC/DC Rectifiers: Designed for next-generation AI data center high-voltage DC power supply solutions, significantly reducing copper losses and power distribution losses;

Server Power Supply Units (PSUs): Compliant with the 80 PLUS Titanium efficiency standard, supporting hot-swap capability and N+1 redundancy design;

CRPS Server Power Modules: Compatible with mainstream GPU servers and AI accelerated computing platforms;

Telecommunications Power Supplies and Base Station Power Modules: 57V/48V output, suitable for edge AI computing node deployments.

Brands involved: Delta, TE, Vicor, TDK-Lambda, Murata, RECOM, and others.

III. DC/DC Converters: Powering the “Last Inch” Close to the GPU

AI GPU core voltages have dropped to the 0.6V–1V range, with transient currents per GPU reaching over 2,000A. DC/DC converters—particularly 48V-to-12V intermediate bus converters (IBCs) and point-of-load (POL) power supplies that deliver 48V directly to the load—have become critical for ensuring stable computing power output.

Mingjiada Electronics’ DC/DC Converter Product Lines:

48V-to-12V Intermediate Bus Converters (IBC): With power ranges from 1 kW to 6 kW and support for current sharing in parallel operation, these are core modules in AI server power racks;

Point-of-Load Power Supplies (POL/PoL Converters): High-current digital POL modules supporting PMBus telemetry, with transient response reaching 1,000 A/μs;

Vertical Power Delivery Modules: Designed for the new vertical power delivery architecture beneath GPUs, shortening the power delivery path;

Brick-Type Power Modules: DC/DC modules in full-brick, half-brick, 1/4-brick, 1/8-brick, and 1/16-brick standard packages;

Open Computing Project (OCP) ORV3-Compliant Power Supplies: Power rack solution modules compliant with OCP specifications.

Brands included: Vicor, MPS, TDK-Lambda, Murata, Delta, etc.

IV. SiC (Silicon Carbide) Power Devices: The “Heart” of High-Efficiency Power Supplies

Thanks to their high voltage rating, low on-resistance, and high-frequency switching capabilities, silicon carbide (SiC) devices have become the power device of choice for AI server power supplies, data center power supplies, and associated energy storage systems.

Types of SiC power devices supplied by Mingjiada Electronics:

SiC MOSFETs: Available in 650V, 1200V, 1700V, and 2000V voltage ratings, covering applications such as server power supply PFC, LLC resonant circuits, and high-voltage DC conversion;

SiC SBD (Schottky Barrier Diode): Used in PFC boost circuits to eliminate reverse recovery losses;

SiC Power Modules: Full-bridge, half-bridge, and H-bridge modules, suitable for high-power power supply cabinets and solid-state transformers (SST);

Automotive-Grade SiC Devices: Simultaneously supplying automotive-grade devices for energy storage and liquid cooling systems in AI data centers.

Brands covered: Infineon (CoolSiC), STMicroelectronics (ST Silicon Carbide), ON Semiconductor (EliteSiC), Wolfspeed, ROHM, Mitsubishi Electric, and others.

V. GaN (Gallium Nitride) Power Devices: High-Frequency, Miniaturized “Accelerators”

Gallium nitride (GaN) devices have switching speeds far exceeding those of silicon-based MOSFETs, enabling power supply frequencies to reach the MHz range and significantly reducing the size of magnetic components. They are key to achieving high power density in AI server power supplies.

Types of GaN power devices supplied by Mingjiada Electronics:

650V GaN HEMT Power Transistors: Suitable for totem-pole PFC and LLC resonant topologies, with efficiency exceeding 99%;

Integrated Driver GaN Power Stages: Feature built-in drivers and protection, simplifying power supply design;

Low-Voltage GaN Devices: 40V/100V GaN, suitable for server motherboard VRMs and DrMOS solutions;

GaN Fast Charging and Auxiliary Power Devices: Compatible with PD fast charging and auxiliary power modules for AI servers.

Brands Covered: Navitas (GaNFast/GeneSiC), Infineon (acquired GaN Systems), EPC, PI (Power Integrations), and others.

VI. Why Choose Mingjiada Electronics?

Brand-new, genuine products: All AC/DC and DC/DC converters, as well as SiC/GaN power devices, are brand-new and genuine from the original manufacturer, with traceability and authenticity verification available;

In-Stock Inventory and Guaranteed Lead Times: Recognizing the AI industry’s time-sensitive nature, we maintain in-stock inventory of popular models to shorten customer wait times;

Flexible Supply Models: We support end-to-end services ranging from samples and small-batch trial production to high-volume procurement;

Extensive Industry Experience: With a long history of serving customers in servers, data centers, telecommunications power supplies, and energy storage, we are well-versed in the evolution of AI power supply architectures.

VII. Conclusion

Competition in the AI server market is, at its core, a competition in power supply efficiency and power density. From AC/DC rectification to DC/DC conversion, and from SiC to GaN, every component in the power supply chain plays a critical role in determining a data center’s PUE level and computing power ceiling.

Mingjiada Electronics will continue to closely follow the technological evolution of AI computing infrastructure, providing customers with high-quality, reliable power converters and third-generation semiconductor power device supply services.