The family of power MOSFETs from STMicroelectronics allows designers of power supplies to maximize the power efficiency of their products while enhancing robustness and safety margins. The MDmesh K5 devices are the first in the world to combine the benefits of super-junction technology with a drain-to-source breakdown voltage of 1500 V; they have already captured important design wins with major customers in Asia, Europe, and the USA.

The devices address the growing demand for higher output power for auxiliary switched-mode power supplies in servers, where power-supply robustness is a key factor in minimizing downtime, and in industrial applications such as welding and factory automation. For these applications, where power output ranges from 75 W to 230 W or above, super-junction MOSFET technology is the preferred choice because of its outstanding dynamic-switching performance.

ST’s MDmesh K5 Power MOSFET family takes this technology to a new level, with the lowest ON-resistance (R_DS(on)) per area and the lowest gate charge (Q_g) in the market, resulting in the industry's best figure of merit (FoM). The devices are ideal for all popular power-supply topologies, including standard, quasi-resonant and active-clamp flyback converters; and LLC half-bridge converters for applications where high efficiency (up to 96%) and output powers approaching 200 W are required for a wide range of input voltages.

The first two members of the family are the STW12N150K5 and the STW21N150K5, which offer maximum drain-to-source currents of 7 A and 14 A, respectively, with gate charge as low as 47 nC (STW12N150K5) or ON-resistance as low as 0.9 Ω (STW21N150K5). Both devices are offered in TO-247 packages.