Product category:
Power Supply ICs and Controllers
News Release from: International Rectifier | Subject: IRF6631/IRF6638 chipset
Edited by the Electronicstalk Editorial
Team on 10 August 2006
Chipset cuts power drain in mid-range
convertors
A new DirectFET chipset is an excellent choice for designers seeking very compact and efficient switching in mid-range, 15-18A power convertor applications.
International Rectifier has introduced a new 30V synchronous buck convertor chipset consisting of the IRF6631 control MOSFET and IRF6638 synchronous MOSFET The pair features IR's benchmark DirectFET packaging with double-sided cooling and the latest HEXFET MOSFET technology to reach higher levels of efficiency and thermal performance at the intermediate current levels (below 18A)
This article was originally published on Electronicstalk on 15 Feb 2001 at 8.00am (UK)
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MOSFETs improve 12V-input converter efficiency
Two new 20V HEXFET power MOSFET families from International Rectifier are designed to increase efficiency by up to 4% in 12V-input DC/DC convertors.
Applications include telecomms, datacomms, advanced notebook and desktop computers and general purpose synchronous buck designs where small sise, high efficiency, and improved thermal conduction result in increased power density.
The new DirectFET chipset is an excellent choice for designers seeking very compact and efficient switching in mid-range, 15-18A power convertor applications.
In addition to improving efficiency by over 1% in the 5-8A range, the board space savings is almost 50% compared with the typical approaches using three SO-8 devices.
Each device is tailored to maximise performance in its role within synchronous DC/DC buck convertor circuits.
The IRF6631 DirectFET Control MOSFET reduces switching losses, while the IRF6638 DirectFET synchronous MOSFET lessens conduction losses and reverse-recovery charge.
The IRF6631 Control FET features a gate charge of 12nC and delivers a 16% reduction in figure of merit of on resistance-gate charge (99.6mWnC) compared with previous offerings.
The IRF6638 synchronous FET delivers a typical on-state resistance of 3.0mohm at 4.5V, a 12% reduction over existing devices while maintaining the same gate charge.
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