COSEL picks ROHM EcoSiC™ technology for 3.5 kW AC-DC PSUs
A leading power supply manufacturer in Japan, COSEL has adopted EcoSiC™ products from ROHM in the HFA/HCA series of 3.5 kW output AC-DC power supply units (PSUs) for 3-phase applications.
Incorporating ROHM SiC MOSFETs and SiC Schottky barrier diodes (SBDs) into the forced air-cooled HFA series and conduction-cooled HCA series of PSUs achieves up to 94% efficiency. The HCA series has been mass produced since 2023, while the HFA series began mass production in 2024.
Many industrial applications that handle high power in the industrial sector, including MRI machines and CO2 lasers, require 3-phase power supplies that differ from the single-phase power supplies used in households. The AC-DC power supply units from COSEL that use EcoSiC™ technology are ideal for high-temperature, high-frequency, high-voltage environments and are compatible with 3-phase power supplies from 200 VAC to 480 VAC — contributing to improved power supply efficiency across a wide range of industrial equipment worldwide.
Akihiro Hikasa, Group General Manager, Power Devices Business Unit, SiC Business Section, ROHM Co., Ltd., comments: “The HFA/HCA series achieve high efficiency despite delivering a high-power output of 3.5 kW by incorporating low-loss SiC power devices from ROHM. Operating at high input voltages typically poses a challenge in reducing losses in high-voltage power devices, but using SiC power devices translates to significantly lower losses compared to conventional solutions, resulting in power supplies that maintains high efficiency and power density even under demanding high-power conditions.”
The HFA/HCA series are 3.5 kW power supplies featuring a wide input range that meets global power supply requirements. This allows them to be used anywhere in the world without the need to modify the power supply for each region, contributing to the standardization of application designs. Both forced air-cooled (HFA series) and conduction-cooled (HCA series) models —selectable based on operating environment — are available in 48-V and 65-V output voltage variants that can be used as power sources for a variety of high-power applications such as laser generation and MRI.
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https://en.cosel.co.jp
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