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MOSFET ups reliability in PC, server power supplies

Posted: 16 Dec 2009 ?? ?Print Version ?Bookmark and Share

Keywords:MOSFET? power supply? power density?

STW77N65M5 MOSFET

STMicroelectronics has beefed up the options for designers using its ultra-efficient MDmesh V power MOSFETs, with a new device in the TO-247 size package that claims to deliver the lowest on-state resistance for 650V MOSFETs.

"The MDmesh V family combines proprietary fifth-generation super-junction technology with our proven PowerMESH horizontal layout, giving superior performance compared to the competing devices," said Maurizio Giudice, marketing director, power MOSFET division, ST. "The industry's lowest RDS(ON) per die area delivers efficiency advantages in any package style. Designers can use this superiority to improve performance and reduce overall size by replacing multi-parallel networks of conventional MOSFETs with a far smaller number of MDmesh V devices."

The new device is the STW77N65M5, which offers an RDS(ON) of 38m? in the TO-247 package. ST also plans to introduce the STY112N65M5 with RDS(ON) of 22m? in the Max247 package during 2010. These devices were unveiled as part of ST's roadmap at the launch of its MDmesh V super-junction MOSFET technology earlier this year. The STW77N65M5 is rated for 69A maximum current and is in full production now.

ST's MDmesh V technology delivers the lowest on-state resistance per unit area compared to conventional MOSFETs and competing super-junction devices. Benefits of this superior low-loss performance include increased efficiency, higher power density and lower operating temperatures leading to better reliability in applications such as PC and server power supplies, solar-power converters, welding power supplies and UPS equipment, where conduction loss has a major influence over efficiency.

While emphasizing ultralow on-state resistance, the devices also achieve low switching losses, thereby enabling an overall efficiency boost across a wide range of applications and operating conditions. MDmesh V power MOSFETs are available in popular package styles including TO-220, TO-220FP, I(2)PAK, D(2)PAK , DPAK and IPAK.

The STW77N65M5 in the TO-247 package is available now for production orders, priced at $10 for orders over 1,000 units.





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