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200/250V MOSFETs claim lowest figure of merit

Posted: 18 Jan 2010 ?? ?Print Version ?Bookmark and Share

Keywords:MOSFET? DC/DC converter? power supply?

OptiMOS power MOSFET

Infineon Technologies AG has expanded the application scope of its OptiMOS power MOSFET portfolio, with the launch of a family of 200V and 250V devices well-suited for synchronous rectification in 48V systems, DC/DC converters, uninterruptable power supplies (UPS) and inverters for DC motor drives. Featuring the lowest figure of merit (FOM) compared to alternative devices, OptiMOS 200V and 250V technology slash conduction losses in system designs by one-half.

Engineers that until now designed 48V power supplies using a diode-based rectification stage in the switch-mode power supply now have an alternative that enables overall efficiency levels exceeding 95 percent, which is 2 percent higher than typical today and translates to 30 percent lower power losses. This fulfills growing demands for higher efficiency in telecommunication networking markets, where business customers are seeking economic and market positioning advantages based on "green" technology infrastructure.

"Infineon's OptiMOS technology consistently sets the benchmark in key specifications for power system design, including leading on-state resistance and FOM characteristics that enable reduced power losses and improved overall efficiency," said Andreas Urschitz, VP and general manager, industrial and multimarket division at Infineon. "Our commitment to continuous improvement in manufacturing process and packaging allows us to extend the product family into a higher voltage range, in line with our company-wide strategy to address the energy efficiency challenges facing modern society."

OptiMOS 200V and 250V family devices feature RDS(on) 50 percent lower than alternative devices, which translates to the lowest possible power losses in high current applications. The industry's lowest gate charge (Qq)up to 35 percent less than alternativescontributes to low losses and fast switching in switched mode applications like isolated DC/DC converters for telecom applications. Additionally, the device family allows system cost improvement through reduced device paralleling; the ability to use smaller heat sinks as a result of the low on-state resistance; and a fast and low complexity design process due to optimized switching behavior.

The outstanding characteristics of the OptiMOS 200V and 250V family allow use of a slim SuperSO8 package (5mm x 6mm x 1mm) for applications that previously required bulky D?PAK devices (9mm x 10mm x 4.5mm). Going from D?PAK to SuperSO8 reduces the power semiconductor space requirement by more than 90 percent and enables higher power density systems. Additionally, using leadless packages like SuperSO8 provides ideal switching behaviour and high efficiency levels.

Available immediately, the OptiMOS 200V and 250V device family includes components in TO-220, TO-262, D?PAK and SuperSO8 packages in RDS(on) classes 10.7m?, 20m?, 32m? and 60m?. For small quantity (10k units), pricing begins at $1.2 for 200V and $1.4 for 250V.

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