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STMicroelectronics Enables Greener and Safer Power Supplies with World’s First 1500V Super-Junction Power MOSFETs

Geneva, Switzerland – WEBWIRE

Geneva, October 20, 2015 - A new 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 MDmeshTM K5 devices are the first in the world to combine the benefits of super-junction technology with a drain-to-source breakdown voltage of 1500V; they have already captured important design wins with major customers in Asia, Europe, and the USA.
The new 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 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.
ST’s MDmesh K5 Power MOSFET family takes this technology to a new level, with the lowest On-Resistance (Rds(on)) per area and the lowest gate charge (Qg) in the market, resulting in the industry’s best FoM (Figure of Merit)[1]. The devices are ideal for all popular power-supply topologies, including standard, quasi-resonant and active-clamp flyback converters, and LLC[2] 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 47nC (STW12N150K5) or On-Resistance as low as 0.9Ω (STW21N150K5). Both devices are offered in TO-247 packages in volume quantities at prices of $14 for 1,000 units.
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  [1] FoM is Gate Charge multiplied by On-Resistance. Power-supply designers want it to be as low as possible.[2] LLC means “two inductors and one capacitor” and it is an AC-DC converter topology that offers high efficiency (95%+) over a wide range of AC input voltages.

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