Nexperia Expands ASFET Portfolio with New High-Performance Switching Devices for 48V Applications
Nexperia has introduced the latest additions to its growing portfolio of Application Specific MOSFETs (ASFETs), purpose-built to meet the demanding requirements of specific end applications. The new 80 V PSMN1R9-80SSJ and 100 V PSMN2R3-100SSJ switches are optimized for high-power 48 V systems that require multiple closely matched MOSFETs operating in parallel to ensure improved dynamic current sharing. Typical applications include traction drives for electric vehicles such as forklifts, e-scooters, and mobility aids, as well as heavy-duty industrial motor drives.
When two or more MOSFETs are connected in parallel to handle higher current and reduce conduction losses, designers often face the challenge of ensuring even current distribution between devices during switching. MOSFETs with a lower gate-threshold voltage (V<sub>GS(th)</sub>) tend to switch on first, causing uneven thermal loading and accelerating device degradation. To counter this, engineers typically select higher-performance MOSFETs and perform additional testing—an approach that is both costly and time-consuming, with no absolute guarantee of consistency under high-load conditions. Alternatively, sourcing tightly matched devices from suppliers can further increase system costs.
Nexperia’s PSMN1R9-80SSJ and PSMN2R3-100SSJ ASFETs overcome these challenges by delivering enhanced dynamic current sharing without requiring device binning or costly selection processes. These new MOSFETs reduce current imbalance between parallel devices by up to 50% (at currents up to 50 A per device) and cut the V<sub>GS(th)</sub> window by 50% (from minimum to maximum, just 0.6 V). Combined with their ultra-low R<sub>DS(on)</sub> of 1.9 mΩ and 2.3 mΩ respectively, these devices deliver outstanding efficiency in power-switching designs.
Both ASFETs come in Nexperia’s robust, space-efficient LFPAK88 copper-clip package (8 mm × 8 mm) and operate across a wide temperature range from –55 °C to +175 °C, making them ideal for demanding automotive and industrial environments.