International Rectifier Introduces 100V-Rated Integrated MOSFET Solution for PoE Applications Slashing Footprint Up To 80%

International Rectifier Introduces 100V-Rated Integrated MOSFET Solution for PoE Applications Slashing Footprint Up To 80%

International Rectifier, IR® (NYSE: IRF), a world leader in power management technology, today introduced the IRF4000, a 100V-rated device integrating four HEXFET® MOSFETs into a single Power MLP package for Power-over-Ethernet (PoE) applications. The new device complies to the IEEE 802.3af specification for networking and communications infrastructure systems, such as Ethernet switches, routers and hubs, delivering up to 15W per port, replacing four individual SOT-223-packaged MOSFETs. The reduced footprint equates to a space savings of up to 80%, or three square inches of circuit board area in a typical 48-port board.

“Considering that each port in a PoE card requires its own MOSFET, the IRF4000 significantly reduces part count over the alternative of using individual MOSFETs in the same circuit. Manufacturing can also be simplified, eliminating 36 component insertions in a 48-port system,” said Carl Smith, marketing manager for networking and telecommunication products at International Rectifier.

The MOSFET operates like a hot-swap FET, transferring power from the PSE to the PD in a controlled fashion, and must operate in the linear region through a demanding worst-case operating condition therefore requiring an extremely robust safe operating area (SOA).