Santa Clara, Calif. -- ROHM touts the development of the industry’s first AC/DC converter control IC designed specifically for SiC MOSFET drive in industrial equipment such as servers and other large power applications. The BD7682FJ-LB integrates a gate drive circuit optimized for SiC MOSFET drive, together with a quasi-resonant system that delivers lower noise and higher efficiency versus conventional PWM methods, said ROHM. This “makes it possible to maximize the performance of SiC MOSFETs used in AC/DC converters, resulting in significant power savings.”
“AC/DC converter design has proved challenging when using discrete configurations due to the large number of components required,” said ROHM. What’s significant about the BD7682FJ-LB is that it delivers greater energy savings and miniaturization in industrial applications due to its highly integrated design and support of SiC power semiconductors that “provide breakthrough levels of efficiency and performance,” added the company.
Compared to silicon MOSFETs used in conventional AC/DC converters, SiC MOSFETs help improve AC/DC converter efficiency by up to six percent, according to ROHM. In addition, they eliminate the need for components used for heat dissipation. The BD7682FJ-LB also includes multiple protection functions that enable support for high voltages up to 690 VAC, making them suitable for general industrial equipment requiring high reliability. In addition to overvoltage protection for the supply voltage pin and a brown in/out (undervoltage) countermeasure for the input voltage pin, overcurrent and secondary overvoltage protection functions are included.