Discrete power MOSFETs are necessary for building switching AC-DC converters that convert the AC mains voltage to a DC voltage and DC-DC converters that convert a (DC) voltage from one level to another. Toshiba is working to further improve MOSFET performance, driven by its resolve to reduce MOSFET losses as much as possible. Reducing conduction and switching losses helps improve the efficiencies of power supply circuits. Toshiba believes this will eventually contribute to the realization of a more energy-conscious and sustainable society.
Toshiba has decades of experience in the development and manufacturing of discrete MOSFETs. Its main products include the mid- to high-voltage DTMOSⅣ Series with a VDSS of 600 V or so and the low-voltage U-MOS Ⅷ-H Series with a VDSS of 30 to 250 V. This article presents an interview with the engineers who were in charge of the development of these MOSFETs.