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AC/DC power supplies boast medical safety badge

Posted: 01 Sep 2008 ?? ?Print Version ?Bookmark and Share

Keywords:medical application? IT equipment? AC/DC power supply?


Emerson Network Power has released a new series of high efficiency 250W AC/DC power supplies that feature both information technology equipment (ITE) and non-patient contact and non-patient critical medical safety approvals.

The new LPS200-M series power supplies are compact open-frame designs measuring 76mm x 127mm (3-inch x 5-inch), with a height of only 39mm (1.5-inch), they have a typical full load efficiency of 88 percent and a power density in excess of 0.66W/cm3. The supplies are primarily intended for use in ITE and light industrial systems, as well as for equipment intended for non-patient contact and non-patient critical use in low power medical, dental and laboratory applications.

LPS200-M series power supplies feature a universal 90- to 264Vac inputenabling them to be used anywhere in the worldand are also capable of operating from a 120Vdc to 300Vdc input. The series comprises two power supplies; the LPS203-M, which has a 12Vdc main output, and the LPS205-M, which has a 24Vdc main output. The 12V model can deliver up to 10.3A continuously with convection cooling, or up to 20.8A continuously with 30 CFM forced air cooling, while the 24V model is rated at 5.2A continuous with convection cooling and 10.4A continuous with 30 CFM forced air cooling. The main output of each model can be adjusted up to 10 percent on either side of nominal, and is tightly regulated to within 2 percent for all line and load conditions. Remote sense facilities are provided to compensate for a drop of up to 0.5 V between the output terminals and the load.

In addition to their main output, both the LPS203-M and LPS205-M also produce an isolated 12Vdc fan output; capable of delivering up to 1 A, this output is regulated to within 5 percent.

Active power factor correction is employed to minimize input harmonic current distortion and ensure compliance with the international EN61000-3-2 standardLPS200-M series supplies have a power factor of 0.99 typical. Both power supplies have a maximum safety-ground leakage current of 275?A, and have a main output hold-up time of 16ms minimum when fed with a 120Vac input and delivering 250W of output power.

LPS200-M series power supplies are comprehensively protected against overvoltage, overtemperature and short-circuit conditions, and feature a 'power fail' signal for remote monitoring purposes which will change state at least 6ms before the main output loses regulation. The power supplies have a full load ambient operating temperature range of 0C to +50C without de-rating and can cold-start from temperatures as low as -20C. Between 50C and 70C, the output should be derated by 2.5 percent per degree.

Emerson Network Power's LPS200-M series AC/DC power supplies comply with the rigorous EN55022-B and FCC part 15 Level B EMC standards for conducted noise and meet all applicable immunity standards, including EN61000-4-2, -3, -4, -5, -6, -8 and -11 levels 3. The power supplies carry a wide set of safety approvals, including UL/TUV/CSA 60950-1 and non-patient contact and non-patient critical 60601-1.

LPS200-M series AC/DC power supplies are available for immediate delivery. Standard lead-time is stock to eight weeks.

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