Silvertel Ag9900 ultraminiature module for the powered device

Silvertel’s Ag9900 series PD module comes in a small package size and is designed to extract power from a Cat5 cable. It fully conforms 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 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. An integrated optimised DC/DC converter operates over a wide input voltage range with high efficiency (up to 87%).

Built-in protection against overloads and short circuits is provided. The regulated DC output nominal voltage is easily adjusted using a simple pull up/down resistor.

The Ag9900M provides signature and control circuitry to give full PoE compatibility. A signature is required by the power sourcing equipment (PSE) before it will provide power to the port.

The Ag9900MT variant provides overtemperature protection. This option reduces the output power if the maximum operating temperature is exceeded. Normal operation resumes when the temperature drops back below the threshold.

The range is a suitable PoE solution for any application, particularly for small devices and space-limited designs such as IP phones, WAPs, sensors and access control panels.