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New Product Introduction

NPI Body

Nexperia application specific MOSFETs

ASFETs for PoE, eFuse and relay replacement

Nexperia’s ASFETs for PoE, eFuse & relay replacement are designed with low-power applications in mind, including Power-over-Ethernet (PoE), low-power inrush management, eFuse and relay replacement. Using the same silicon technology as the bigger ‘ASFETs for hotswap’, these smaller ASFETs deliver enhanced SOA for low-power linear-mode applications in a range of compact DFN2020 (2 x 2 mm) and LFPAK33 (3.3 x 3.3 mm) packages.

Key features

Enhanced safe operating area (SOA) for superior linear mode operation
Low R_DSon for low I2R conduction losses
2 mm x 2 mm space-saving DFN2020 package, 60% smaller footprint than LFPAK33
Very low I_DSS leakage

Additional features

ASFETs primary role is to:
- Safely manage capacitive inrush current when Powered Devices (PD’s) are connected to Power sourcing Equipment (PSE’s)
- Provide current limit & shutdown to safely manage overload conditions & cable faults
ASFETs for PoE combine industry leading enhanced Safe Operating Area (SOA) and low R_DS(on)
ASFETs for PoE are available in LFPAK33 (3.3 x 3.3 mm) and space-saving DFN2020 (2 x 2 mm) package
ASFETs deliver superior linear-mode capability, power density and thermal efficiency in a compact footprint
Enabling designers to squeeze more high-power PoE ports into a compact router / switch
Also suitable for eFuse & relay replacement where superior fault tolerance is required