Emerson Network Power AC-DC power supply

Emerson Network Power has announced a high-efficiency 100-150 W AC-DC power supply that can be used for power-over-ethernet applications.

The LPS109-M supply is suitable for powering PoE-enabled networking devices such as ethernet switches or applying a DC voltage to CAT5 cable for powering remote devices such as IP security cameras, WLAN access points and VoIP phones.

The main output meets the electrical isolation requirements of the IEEE 802.3at-2009 PoE standard. The supply also carries both information technology equipment and non-patient contact and non-patient critical medical safety approvals, making it suitable for a diverse range of low power applications.

It has a typical full load efficiency of 88% and a power density greater than 0.88 W/cm³. It can be accommodated in 1U high rackmount and low-profile equipment. A metal safety enclosure kit (LPX50) is also available.

The device has a universal 90-264 VAC input, enabling it to be used almost anywhere in the world without adjustment and is also capable of operating from a 120-300 VDC input.

The supply produces a main output of 54 VDC, rated at 1.85 A continuous with convection cooling, which can be uprated to 2.8 A with forced air cooling.

It also produces an isolated 12 VDC fan output, at 1 A. The main output is regulated to within ±2% and can be adjusted over the range 48.6 to 59.4 VDC. Remote sense is provided to compensate for a drop of up to 0.5 V between the main output connector and the load. The supply will operate without remote sense connected.

Active power factor correction minimises input harmonic current distortion and ensures compliance with the EN61000-3-2 standard. The supply has a maximum safety-ground leakage current of 275 μA and the main output has a hold-up time of 10 ms minimum when delivering its full 150 W of output.