Reference design delivers a 3kW server power supply with high efficiency and compact power density using surface-mounted silicon carbide MOSFETs.
Toshiba Electronic Devices & Storage Corporation has developed a 3kW reference design for AI server power supplies using surface-mounted silicon carbide (SiC) MOSFETs. Designed to meet the increasing power demands of AI servers equipped with high-performance processors, the reference design combines high efficiency with a compact form factor. Complete design resources are also provided to help engineers accelerate product development.
In addition, the reference design accepts an AC input voltage of 180 V 264 V, it delivers a regulated 50 V output, which has a maximum power of 3kW. The design uses a combination of a semi-bridgeless power factor correction circuit and a phase-shift full-bridge converter to improve conversion efficiency. The design also utilises an integrated output ORing circuit that supports redundant power operation. An auxiliary power supply powers the internal control circuitry.
The power stage employs Toshiba provides the company’s TW092V65C silicon carbide MOSFETs and TRS12V65H silicon carbide Schottky barrier diodes for the power factor correction circuit. The phase-shift full-bridge converter uses TW027U65C silicon carbide MOSFETs with built-in Schottky barrier diodes on the primary side and TPW2900ENH power MOSFETs for secondary-side synchronous rectification. Isolated gate signal transmission is carried out using a DCL540C01 digital isolator. The output ORing circuit uses the TPM1R908QM power MOSFET.
This reference design is intended for high-density AI server power systems where high efficiency and reliability are key requirements. It provides guidance on circuit operation, component selection and PCB implementation, helping simplify the development of high-density server power supplies.
Toshiba provides this reference design with a reference guide, design guide, circuit schematics, BOM, and PCB layout data. Through integrating silicon carbide power devices with design documentation, the reference design provides a practical foundation for future AI server power supplies.
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