High Efficiency 80 to 150W AC-DC Power Supply From Powersolve

15th December 2008

Powersolve

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Powersolve announces a high efficiency 80 to150W AC-DC supply that features both commercial and medical safety approvals. The new LPS100-M power supply series from Emerson Network Power comprises compact open-frame designs measuring just 2 x 4in with a height of just 1.29 inches. The units have a typical full load efficiency of 88% and a power density in excess of 14 watts/in³.

The LPS100-M is primarily intended for use in information technology equipment (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.

The new power supply features a universal 85 to 264 VAC input and is also capable of operating from a 120 to 300 VDC input. The power supply produces a tightly regulated main 12 VDC output, together with an isolated 12 VDC fan output rated at 1 A, while the main output can deliver up to 8.3 A continuously with convection cooling, or up to 12.5 A continuously with 30 CFM forced air cooling. The main output can be adjusted over the range 10.8 to 13.2 VDC, and remote sense facilities are provided to compensate for a drop of up to 0.5 V between the output terminals and the load.

Active power factor correction is employed to minimize input harmonic current distortion and ensure compliance with the international EN61000-3-2 standard – the LPS103-M has a power factor of 0.99 typical. The power supply has a maximum safety-ground leakage current of 275 μA, and the main output has a hold-up time of 16 ms minimum when the supply is fed with a 120 Vac input and is delivering 150 watts of output power.

LPS100-M power supplies are protected against overvoltage, overtemperature and short-circuit conditions, and feature a ‘power fail’ signal for remote monitoring purposes which will change state at least 6 ms before the main output loses regulation. The power supplies have a full load ambient operating temperature range of 0 to +50ºC without de-rating and can cold-start from temperatures as low as -20ºC.

The supplies comply with 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 nonpatient contact and non-patient critical 60601-1.