Ericsson has introduced a new 50 W DC-DC converter module that targets Power-over-Ethernet (PoE) applications. Very importantly, the new Ericsson PKU5510E converter features an ultra-wide input range of 18 V to 75 V, which means that the device is also suitable for 24 V or 48 V telecom systems. The module is the latest evolution of Ericsson's PKU family and combines the thermal enhancements integrated in the recently announced PKU4116C module together with an optimized fly-forward topology, which was first introduced by Ericsson in 2008. The PKU5510E delivers an output current of 15 A at 3.3 V output and has a built-in functional isolation of 2250 Vdc that meets the requirements specified by the IEEE802.3 Ethernet networking standard, and also meets Basic Insulation requirements according to IEC/EN/UL60950.
The PKU5510E has been designed for applications that have to accommodate both telecom system bus voltages of 24 V and 48 V, while also being a best-in-class product to supply voltages to Power-over-Ethernet based applications such as remote antennas, WIFI repeaters, basestation microcells, CCTV/camera monitoring systems and a variety of different sensors.
Due to its ultra-wide input and high efficiency, the PKU5510E is also an ideal solution to power industrial applications and many others that use remote power feeds, where a module is required to operate irrespective where it is connected or indeed of the length of the line cable. In addition, the wide input range of PKU5510E offers another benefit for applications that require a hold-up capacitor to prevent the loss of vital data in the case of line disruption. As the module can operate at 18 V, a hold-up capacitor can maintain voltage for a longer period of time when compared to a competitive power module with a narrower input range. And because of the module's wide range of operation, this can even reduce the amount of capacitors required and therefore reduce cost.
Designed for applications that are subject to peak currents and environment with very low natural convection or airflow, the PKU5510E embeds a unique overload protection system. In these types of applications, the overload protection must prevent false triggering while simultaneously guaranteeing reliable protection from overloading. A solution for this complex situation has been achieved by combining two Over-Current Protection (OCP) methods. In the case of a short-duration overload, the hiccup-mode OCP uses a tightly controlled cycle-by-cycle current limitation; and in the case of longer overload, the hiccup-mode OCP will trigger for conventional hiccup protection. Available in an industry-standard sixteenth-brick footprint - with dimensions of 33 x 22.9 mm and a low-profile height of only 9.4 mm (1.3 x 0.9 x 0.37 in.), the device delivers up to 50 W, and provides up to 92% efficiency at 50% load and 27 V input, guaranteeing low power dissipation and reduced energy consumption.
The PKU5510E series is available in both through-hole (PI version) and surface-mount (SI version) types. The PKU5510E is priced at $15 in OEM quantities.