APEC 2024: Rohm’s Latest GaN and SiC Developments

Long Beach, CA: Rohm Semiconductor has made significant strides in the ongoing GaN vs SiC debate within the industry. Recently, the company announced a major design win for its 650V GaN device, the EcoGaN, in the development of the 45W output USB-C charger C4 Duo by Innergie, a Delta brand. This achievement highlights Rohm's commitment to pushing the boundaries of power supply efficiency and reliability.

The utilization of GaN technology in power supplies offers a range of benefits, including high-speed switching capabilities that result in energy savings and the ability to use smaller circuits. These advantages contribute to the miniaturization of end products, making them more compact and efficient. Jay Barrus, president of Rohm Semiconductor Americas, emphasized the importance of these advancements in meeting the evolving needs of the market.

In addition to its GaN developments, Rohm Semiconductor is also focusing on the advancement of its SiC technology. Barrus confirmed that the company is currently working on a power module set to be released in 2025, as well as the development of its fifth generation SiC, which is expected to be available within the next one to two years. This dual focus on GaN and SiC technologies underscores Rohm's commitment to innovation and staying ahead of industry trends.

Furthermore, Rohm Semiconductor recently announced the acquisition of a fabrication facility in Japan to expand its SiC production capacity, complementing its existing fab in Germany. The company's strategic move aims to address the growing demand for SiC components, particularly from automotive manufacturers. By enhancing yield levels for six-inch wafers, Rohm is positioning itself to meet the increasing market requirements and drive down production costs.

Discussing the technical aspects of Rohm's approach, Barrus highlighted the significance of die and die structure in their technology development. The company's use of trench technology presents certain challenges, but Barrus noted that their Gen 5 iteration offers benefits in terms of RDS while maintaining a strong focus on yield optimization. He also acknowledged the importance of considering alternative design approaches, such as planar structures, to ensure a balanced and efficient production process.