Family of Titanium Efficiency AC to DC Power Supplies


1.5 to 3.2 kW TET Series Respond to Ramping Opportunity for GaN-based Data Center Power Supplies

Transphorm, Inc. and Bel Power Solutions stated that six of Bel’s Titanium Efficiency Power Supplies use Transphorm’s high voltage GaN FETs. This news indicates the growing trend of high performance, wide bandgap power supply units (PSUs) being deployed in datacenter servers, routers, and network switches.

The six GaN-based TET series PSUs are AC to DC front end supplies. They include the TET3000 series, the industry’s first AC-DC supplies to achieve Titanium efficiencywith GaN being used in the AC-to-DC bridgeless totem-pole power factor correction (PFC) power stage—a product that has since been modified using the same circuitry with firmware improvements to become the TET3200 series based on customer interest in higher power output. The remaining four TET series range in power levels from 1.5 to 2.5 kW and are packaged in standard 1U or common redundant power supply (CRPS) rack mount form factors. The entire family delivers greater than 96 percent efficiency at high line with a main output of 12 VDC, earning the PSUs an 80 Plus Titanium rating.

GaN: Revolutionizing Data Center Power

Gallium nitride power converters offer fundamental advantages compared to Silicon (Si) in power applications. Specifically, Transphorm’s GaN FETs are proven to increase the efficiency of the AC to DC PFC stage to more than 99 percent, thereby increasing power density (more power in the same form factor) while reducing the overall system cost—all with a published field reliability of < 1.0 FIT.

As a result of these benefits, the use of GaN power transistors is expected to increase rapidly over the next few years. In fact, Omdia recently forecasted that the overall compound annual growth rate (CAGR) of GaN power transistors used in data center power supplies will be 66.5 percent from 2019 to 2024.

For more information, visit Bel and Transphorm.