company blog about Supply and Recycling Infineon REF-3K3W-HFHD-PSU: 3.3 kW High-Density GaN Rectifier Evaluation Board for Servers and Telecommunications

Mingjiada Electronics offers genuine REF-3K3W-HFHD-PSU evaluation boards in stock—a high-power-density power supply solution designed specifically for AI data centers, servers, and telecommunications infrastructure, with global recycling services available.

REF-3K3W-HFHD-PSU Product Overview

With the explosive growth in demand for AI computing power and the widespread deployment of 5G communications infrastructure, data centers and telecommunications equipment are facing unprecedented challenges regarding the efficiency, power density, and thermal management of power modules. Mingjiada Electronics now offers the REF-3K3W-HFHD-PSU from Infineon—a 3.3 kW high-power-density, 500 kHz high-frequency switching GaN (gallium nitride) rectifier evaluation board that serves as a reference design blueprint for next-generation server power supplies and telecommunications rectifiers.

Achieving a power density of 95 W/in³ and a peak efficiency of up to 97.4%, this evaluation board is Infineon’s flagship reference design that integrates the advantages of GaN, SiC, and Si semiconductor materials. It is suitable for applications such as AC-to-DC power conversion, data center computing solutions, and telecommunications infrastructure.

REF-3K3W-HFHD-PSU Key Technical Features

1. Innovative Hybrid Semiconductor Topology

The REF-3K3W-HFHD-PSU employs a two-phase interleaved, bridge-less totem-pole PFC (power factor correction) design in the front end, utilizing CoolSiC™ 650V silicon carbide MOSFETs to significantly reduce switching losses and enhance high-voltage stability. The back-end DC-DC converter employs a GaN LLC half-bridge topology operating at a high frequency of 500 kHz, paired with a full-bridge rectifier, to fully leverage the physical advantages of gallium nitride devices in terms of low switching losses at high frequencies.

2. Ultimate Efficiency and High Density

At full load with a 3.3 kW output (output voltage 48 V–51 V), the evaluation board achieves an efficiency of up to 97.4% @ 95 W/in³. This high conversion efficiency translates to reduced cooling requirements and lower operating electricity costs, effectively lowering the total cost of ownership (TCO) for large data centers housing tens of thousands of servers.

3. Digital Control and Hold Time

This design employs the XMC4000 series microcontroller (Arm® Cortex®-M4) to digitally control both the PFC and LLC converters, providing flexible parameter configuration and monitoring capabilities. Its built-in “Baby Boost” boost circuit extends the hold-up time by 20 ms in the event of an input power interruption, ensuring uninterrupted server operation during grid fluctuations and meeting OCP (Open Compute Project) standards.

Technical Specifications at a Glance

Model: REF-3K3W-HFHD-PSU

Manufacturer: Infineon

Output Power: 3300 W

Efficiency: 97.4%

Output Type: DC (Direct Current), 48V–51V

Input Type: AC (Alternating Current)

Core Topology: SiC Totem Pole PFC + GaN LLC Resonant

Certification: OCP Rectifier v3 Standard

REF-3K3W-HFHD-PSU Typical Applications

AI and General-Purpose Server Power Supplies: Provides efficient, high-density 48V DC power to CPU/GPU motherboards.

Data Center Infrastructure: Used in rack-mounted power distribution units (PDUs) and high-voltage direct current (HVDC) power supply systems.

Telecom and Networking Equipment: Meets the stringent requirements for high-reliability rectifiers in 5G base stations and core network equipment.

Mingjiada Electronics: Genuine Stock and Supply Chain Services

Established in 1996, Shenzhen Mingjiada Electronics Co., Ltd. is a globally renowned, ISO 9001 and ISO 14001-certified authorized independent distributor of electronic components. For the REF-3K3W-HFHD-PSU evaluation board, we offer our customers the following benefits:

Brand-New, Genuine: In-stock inventory, guaranteed to be genuine factory products, with a production year of 25+ or newer.

Efficient Supply: Warehouses in Shenzhen and Hong Kong support rapid delivery.

Recycling Services: We provide recycling solutions for obsolete and idle inventory to help customers revitalize their assets.

To obtain detailed specifications for the REF-3K3W-HFHD-PSU, request purchase samples, or inquire about bulk recycling services, please contact the Mingjiada Electronics sales team.