MOSFETs suit hot swap, soft start and e-fuse applications

Nexperia has introduced the latest addition to its NextPower Live linear-mode MOSFET family. The PSMN3R7-100BSE is said to deliver a best-in-class combination of strong safe operating area (SOA) and low RDS(on), and is suited to hot swap, soft start and e-fuse applications.

To manage the high in-rush current that can occur when swapping a server board or other pluggable system, or to ensure that a processor board is brought up smoothly, a MOSFET with high SOA is used in conjunction with a hot swap controller.

The company says that previous generation parts have traded off SOA against RDS(on), whereas the new technology maximises SOA without affecting RDS(on), thereby maintaining high operating efficiency levels.

These new MOSFETs improve SOA with a four-fold improvement in linear mode performance compared with standard technology, says Nexperia. They have a maximum RDS(on) of 3.95 m-Ohm (3.36 m-Ohm typ.) – around 18 percent less than previous devices.

These N-channel 100V devices are available in the D2PAK package, qualified to 175 OC. Devices are said to be fully compatible with hot-swap controllers from all leading manufacturers

Mike Becker, product manager at Nexperia, said: “Server and communications infrastructure companies are packing more processing power onto their blades and rack-based systems, continually pushing up power requirements.

“Reliable hot-swap operation is essential to manage the in-rush currents experienced during start-up, but as power levels rise and efficiency requirements increase, then low RDS(on) is also becoming more important.

“NextPower Live MOSFETs from Nexperia, deliver benchmark combination of strong SOA and low RDS(on), allowing engineers to design ultra-rugged hot-swap solutions to manage the in-rush currents, while lower RDS(on) delivers the highest level of efficiency.”

Nexperia, the former standard products division of NXP, provides discretes, logic and MOSFET devices. The company produces 90 billion semiconductor components annually and meets standards set by the automotive industry.

The company has an extensive IP portfolio and is certified to ISO9001, ISO/TS16949, ISO14001 and OHSAS18001.

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