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MOSFETs designed for switching converter apps

Posted: 22 May 2006 ?? ?Print Version ?Bookmark and Share

Keywords:IRF7853? IRF7854? IRF7855? MOSFET? HEXFET?

International Rectifier (IR) introduced new negative-channel 60, 80 and 100V HEXFET MOSFETs for switching converter applications used in networking and communications systems. The IRF7853PbF, IRF7854PbF and IRF7855PbF are designed for AC/DC secondary-side synchronous rectification, isolated medium-power DC/DC applications.

"A MOSFET's on-state resistance and total gate charge performance have a first-order effect on overall circuit efficiency. Our three new SO-8 devices use IR's Trench MOSFET technology to deliver reductions in Rds(on) and Qg to bring system-level benefits to converter circuits," said Mario Battello, marketing manager for switch-mode power supply products at IR.

The 100V IRF7853 is also designed for wide-range communication bus input (36V to 75V) primary-side bridge topologies in isolated DC/DC bus converters. The 80V IRF7854 is said to be useful for active ORing and hot-swap applications. All three of the MOSFETs are designed for secondary-side synchronous rectification in 5V-19Vout flyback converter and resonant half-bridge applications, and are suitable for isolated DC/DC applications as primary-side switches in forward or push-pull topologies for 18V-36Vin isolated DC/DC converters.

These HEXFET MOSFETs are available immediately. Pricing in 10,000-unit quantities begins at $1.20 each for IRF7853, $1.06 each for IRF7854, and $1.04 each for IRF7855.

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