El Segundo, Calif.—International Rectifier's IRF4000 is a multiple power switch rated at 100 volts that integrates four HEXFET MOSFETs into a single Power MLP package for Power-over-Ethernet (PoE) applications. These IEEE802.3af compliant ICs, designed for power sourcing equipment (PSE), deliver up to 15 watts per port, thus replacing four individual SOT-223 packaged MOSFETS and saving up to 80 percent in board space (three square inches in a typical 48-port board). It's also compliant with the upcoming PoE Plus architecture for high power loads.
"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," said Carl Smith, marketing manager for networking and telecommunications products. "Manufacturing can also be simplified, eliminating 36 component insertions in a 48-port system."
The IRF4000, with an on-resistance of 350 milliohms at Vgs = 10, reportedly features low transconductance and a low thermal resistance (about 1°C/W) package. The new device guarantees a safe operating area (SOA) that is 56 percent greater then can be secured with individual SOT-23 MOSFETs, according to the company.
In addition to 48-port systems, the IRF4000 is suited for 96-port applications or for smaller PoE “jack companion” modules using 12-ports where, in each case, four ports can be addressed with a single IRF4000 device.
Click here for the device datasheet. The IRF4000 is priced at $2 each in 10k quantities. Prices are subject to change.
International Rectifier, 1-310-252-7105, www.irf.com