International Rectifier Introduces AC-DC Synchronous Rectification and ORing MOSFETs with Benchmark-Low On-State Resistance
EL SEGUNDO, Calif. - November 2004 - International Rectifier, IR® (NYSE: IRF), a world leader in power management technology, today announced a new range of 75V and 100V HEXFET® MOSFETs specifically for AC-DC synchronous rectification (SR) and ORing circuits. The new MOSFETs feature benchmark low on-resistance (IRFB4310 [100V] RDS(on) =7mOhm; and the IRFB3207 [75V] RDS (on) =4.5mOhm) to improve efficiency and power density in laptop/LCD adaptor and server AC-DC SMPS applications.
The new devices are suitable for the secondary side of many different AC-DC topologies including flyback, half-bridge, full-bridge and forward converters. Historically, Schottky diodes were used as output rectification devices for high power density SMPS. Significant efficiency improvement can be gained by replacing Schottky rectifiers with synchronous rectification MOSFETs.
"As microprocessors become faster and more power hungry, IR's new SR MOSFETs enable higher power, higher efficiency and greater power density AC-DC SMPS for next generation digital systems," said Stephen Oliver, Marketing Manager for AC-DC Products at International Rectifier.
Depending on application details, the new SR MOSFETs enable higher efficiencies and may allow a "two-for-one" exchange for competing devices to reduce component count, save PCB area and increase power density. In addition, IR's selection of packages enables a simplified performance upgrade path for existing designs.
The new 75V and 100V devices are available in TO-220, D2Pak and TO-262 qualified to Q101 grade and moisture sensitivity level 1 (MSL1). Lead-free packages are also available to help customers meet the "Restriction of the Use of Hazardous Substances in Electrical and Electronic Equipment" (RoHS) directive in the newest SMPS solutions without any compromise in performance. The lead-free versions are the same price as standard parts. See the International Rectifier Lead-free products FAQ for more details.
Availability and Pricing
The new AC-DC SR HEXFET MOSFETs are available immediately. Pricing begins at US $0.95 each for the IRFB4610 in 10,000-unit quantities.