“Prior to the introduction of the new PoE+ PSE single-port magnetic connector, implementing PoE or PoE+ in a single-port application required developing a discrete solution on the customer board using a custom controller chip,” explains Diarmuid Cullinan, embedded product manager at Molex, adding: “Power must be isolated from the signal, and significant design effort is required to protect the customer board from electromagnetic interference (EMI) and electrostatic discharge (ESD) while simultaneously meeting all the requirements of the IEEE802.3at standard.”
The PSE-ICM provides the simplest solution for designing a single-port PSE. By streamlining design and testing processes, OEMs can bring their products to market faster, achieve savings on their investments, and reduce direct, production, and associated purchasing costs. Diarmuid Cullinan notes, “Aside from the power supply, the 85759 series includes the complete single-port PSE, integrating the RJ45 connector with two LEDs, gigabit-capable PoE+ Ethernet magnetic elements, and the high-power PSE controller. All that is required is a single voltage of 51V for PoE+ or 48V for PoE to automatically manage and control the power to connected Ethernet devices, such as VoIP phones with color displays, wireless access points, and PTZ (Pan/Tilt/Zoom) security cameras.”
The Molex PoE+ PSE single-port magnetic connector design optimizes the distance between the signal and LED pins and the PoE circuitry, significantly reducing PCB routing complexity. The module features an external reset function and an option to enable maximum power delivery. A wide variety of LED configurations and colors are available, including single-color and bi-color versions.
Power over Ethernet (PoE) is a technology that enables the transmission of both data and power to networked devices over a standard Ethernet cable, eliminating the need for additional power supplies. PoE+ is the newer IEEE 802.3at standard. It allows for increased port output power up to 30W by specifying Class 4, replacing the 15W (Classes 0-3) IEEE 802.3af standard introduced in 2004.
Molex also offers the 85789 series magnetic connector, which supports gigabit PoE+. PoE or PoE+ power can be transmitted or received through this connector using PoE circuitry located on the customer's board. The 85793 series is available for gigabit applications without PoE.
