Silvertel Ag9900-LP miniaturised PoE PD module

The Ag9900 series modules are said to push the boundaries of PoE miniaturisation, yet still offer all the features expected from Silvertel’s PoE devices. The LP variant offers a low-profile module that is only 8 mm tall to match the low-profile RJ45 connectors.

The module is designed to extract power from a Cat5 cable, fully conforming to the 802.3af Power over Ethernet (PoE) standard, and includes 1.5 kV isolation, a PoE signature and an integral DC to DC converter. The module provides a Class 0 signature.

The device provides signature and control circuitry to provide full PoE compatibility. This signature is required by the power sourcing equipment (PSE) before it will provide power to the port. The module’s integrated DC/DC converter operates over a wide input voltage range with high efficiency (up to 87%).

The product offers a simple, ultrasmall PoE solution using minimal external components. External bridge rectifiers enable the device to be powered from mid- or end-span PSE, accepting power from either the spare or data pairs of the cable. The regulated DC output voltage is easily adjusted using a simple pull up/down resistor.

The overtemperature protection reduces the output power if the maximum operating temperature is exceeded. Normal operation resumes when the temperature drops back below the threshold. Built-in protection against overloads and short circuits is also provided.

The device is suitable as a PoE solution for any application, but particularly for small devices and space-limited designs such as IoT, WAPs, sensors, access control and small IP cameras.