SMD pulse transformers for Gigabit Ethernet and PoE

February 06, 2018 // By Nick Flaherty
TDK has expanded its range of pulse transformers with new types for Gigabit Ethernet and Power over Ethernet (PoE) applications.

The ALT4532P type is designed for emerging 2.5GBASE-T (2.5 Gbit/s) and 5GBASE-T (5 Gbit/s) LAN applications as well as 1000BASE-T (1 Gbit/s) applications with 600mA PoE. The ALT4532H is compatible with the 10GBASE-T standard (10 Gbit/s). The components feature a compact SMD package with dimensions of 4.5 mm x 3.2 mm x 2.9 mm.

In recent years, Ethernet standards have been established for higher transmission rates up to 10 Gbit/s. With the ALT4532 components TDK is responding to the rising demand for compact pulse transformers for these high-speed LAN interfaces, in particular, for the growing number of IoT devices. The IEC 4532 packages make the SMD components suitable for circuit board layouts with many pulse transformers.

Unlike conventional products with toroidal shaped cores, these transformers feature a special core design that is optimized for fully-automated production and winding processes, resulting in extremely stable quality. The discrete ALT4532 types offer designers greater flexibility for circuit board layouts than conventional LAN modules that combine pulse transformer and common-mode filters in a single package, for example, enabling mounting on both sides of the PCB.

The ALT4532P transformers are available in volume now.

www.global.tdk.com