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Power block devices target DC-DC synchronous buck apps

Posted: 05 Aug 2013 ?? ?Print Version ?Bookmark and Share

Keywords:power block device? DC-DC synchronous buck applications? MOSFET?

International Rectifier (IR) has debuted a couple of power block devices for DC-DC synchronous buck applications such as advanced telecom and netcom equipment, servers, graphic cards, desktop, Ultrabook and notebook computers. The 25V IRFH4251D and IRFH4253D feature the firm's latest generation silicon in a novel package that delivers benchmark power density in a 5 x 6mm PQFN, indicated the company.

The power block devices feature an integrated monolithic FETKY, and innovative package employing a leading-edge flipped-die technology that enables efficient dissipation of the heat from the source of the synchronous MOSFET directly to the ground layers of the PCB. As a result of improved thermal performance and increased power density, one of the devices may replace two 5 x 6 standard single devices. The package also uses IR's proprietary single copper clip employed in PowIRStage and SupIRBuck products, as well as an optimised layout that significantly reduces stray inductance to lower peak ringing. This allows the designer the option to use 25V MOSFETs in place of less efficient 30V devices.

Optimised for 5V gate drive applications, the IRFH4251D and IRFH4253D work with any controller or driver to offer design flexibility while delivering higher current, efficiency and frequency capability in a small footprint compared to alternative approaches using two discrete 30V power MOSFETs.

Pricing for the IRFH4253D and IRFH4251D begins at $0.89 and $1.29 respectively in 10,000-unit quantities. Production orders are available immediately. Prices are subject to change.

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