Cosel taps Rohm SiC for 3.5kW power supplies
Cosel in Japan is using the latest EcoSiC silicon carbide MOSFETs and Schottky barrier diodes (SBDs) for a series of 3.5kW AC-DC power supplies.
The three phase 3.5kW AC-DC power supply units from Cosel uses the Rohm ecoSiC MOSFETs and SiC SBDs in the forced air-cooled HFA series and conduction-cooled HCA series to achieve 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 HFA/HCA series have a wide input range (200VAC to 480VAC) 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 48V and 65V output voltage variants that can be used as power sources for a variety of high-power applications such as laser generation and MRI scanners.
“The HFA/HCA series achieve high efficiency despite delivering a high-power output of 3.5kW by incorporating ROHM’s low-loss SiC power devices. 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,” said Jun Uchida, General Manager, New Product Development Dept. 2 at Cosel.
www.rohm.com/products/sic-power-devices
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