By ROHM Semiconductor 40
ROHM's 650 V IGBTs combine class-leading low conduction loss with high-speed switching characteristics. This makes them ideal for power conversion in general-purpose inverters and converters for consumer appliances, such as ACs and induction heaters (IH), as well as industrial equipment, including power conditioners, welding machines, and uninterrupted power supplies (UPS). A total of 21 models are offered, consisting of the RGTV series, which features short-circuit tolerance, and the RGW series that delivers fast switching speed.
In recent years, the emergence of IoT has caused exponential growth in the volume of data generated, bringing about a need to improve the functionality and capacity of data centers. However, as the number of servers and UPS essential to ensuring stable operation of the main power supply continues to rise, it becomes increasingly difficult to reduce power consumption. In addition, in high power applications that utilize IGBTs, there is a need to maintain reliability by simplifying measures against overshoot during switching, which can lead to device failure or malfunction.
In response, ROHM utilized thin wafer technology and a proprietary structure to deliver class-leading performance that optimizes the trade-off relationship between conduction loss and switching speed. For example, when used in an interleaved PFC circuit, efficiency is improved by 1.2% at light loads and 0.3% under heavy loads, contributing to lower application power consumption. In addition, optimizing the internal design allowed ROHM to achieve smooth switching characteristics that decrease voltage overshoot by 50% compared to products with equivalent efficiency, reducing the number of parts required along with design load.