Infineon Launches OptiMOS Linear FET 2 MOSFET, Enabling Advanced Hot-Swap Technology and Battery Protection Functions

To meet the safety hot-swap operation requirements in AI servers and telecom applications, MOSFETs must feature a robust linear operating mode and a low RDS(on). Infineon Technologies (FSE: IFX / OTCQX: IFNNY) has launched the new OptiMOS™ 5 Linear FET 2, which addresses this challenge. This MOSFET is specifically designed to achieve an ideal balance between the low RDS(on) of trench MOSFETs and the wide safe operating area (SOA) of traditional planar MOSFETs. This semiconductor device prevents damage to the load by limiting high surge currents and minimizes power losses during operation due to its low RDS(on).

Compared to the previous generation OptiMOS™ Linear FET, the OptiMOS™ Linear FET 2 improves SOA performance at high temperatures, reduces gate leakage current, and expands the range of available packaging options. These improvements allow each controller to parallel more MOSFETs, lowering Bill of Materials (BOM) costs and providing greater flexibility for designs by expanding the product portfolio.

The 100 V OptiMOS™ Linear FET 2 comes in a TO-leadless package (TOLL). Compared to the standard OptiMOS™ 5, which has similar RDS(on), this device offers a 12-fold higher SOA at 54 V in 10 ms, and a 3.5-fold higher SOA at 100 µs. The latter improvement is especially important for battery protection in Battery Management Systems (BMS) during short circuit conditions. Ensuring proper current distribution between parallel MOSFETs is critical to system design and reliability during short circuits. The OptiMOS™ 5 Linear FET 2 enhances current sharing by optimizing its transfer characteristics. With its wide SOA and improved current splitting, the number of components in designs, dictated by short-circuit current requirements, can be reduced by up to 60%.

This results in high power density, high efficiency, and highly reliable battery protection, making it ideal for applications in power tools, e-bikes, electric motorcycles, forklifts, uninterruptible power supplies (UPS), and pure electric vehicles.