ST takes super-junction power MOSFETs to 1500V rating

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By eeNews Europe

A target market is higher output power auxiliary switched-mode power supplies in servers, where power-supply robustness is a key factor in minimising down-time, and in industrial applications such as welding and factory automation. For these applications, where power output ranges from 75W to 230W or above, super-junction MOSFET technology is the preferred choice because of its outstanding dynamic-switching performance.

MDmesh K5 Power MOSFETs claim the lowest on-resistance (Rds(on)) per area and the lowest gate charge (Qg), resulting in the industry’s best FoM (Figure of Merit). The devices can be used in 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 200W are required for a wide range of input voltages.

The first two members of the new family are the STW12N150K5 and the STW21N150K5, which offer maximum drain-to-source currents of 7A and 14A, respectively, with gate charge as low as 47 nC (STW12N150K5) or on-resistance as low as 0.9Ω (STW21N150K5). Both devices come in TO-247 packages in volume quantities at prices of $14 (1,000).



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