New Industry Products

Lambda Responds to Increasing Demand for Medically Rated Power Supplies

July 25, 2007 by Jeff Shepard

Lambda has extended its popular NV-family of configurable ac-dc power supplies to include a new range of models designed specifically with medical applications in mind. With a reinforced 4kVac input to output isolation, the units meet the IEC 60601 international safety standards for medical equipment, making them suitable for use in patient-connected medical applications. The NV-175M power supplies include PFC, efficiencies up to 90% and output power ratings of up to 180W (200W peak).

Four standard models are available for rapid delivery and many custom-configurations can be built-to-order having 1 to 3 outputs with available output voltages of 3.3, 5, 12, 15 and 24Vdc (adjustable to 28V). No minimum loads are required. The operating input voltage range is from 90 to 264Vac, 45Hz to 63Hz. The NV-175M has an optional temperature-controlled fan to ensure optimum cooling while achieving the lowest possible audible noise performance. These compact supplies are approximately 1.3" high x 3" wide x 5" long (without cover or fan).

Despite the more substantial insulation requirements demanded by IEC 60601, these compact units are capable of fitting 1U enclosures. Worst-case leakage current is less than 300µA at 264Vac/63Hz, making it suitable for worldwide markets. Other compliances include RoHS, UL/IEC/CSA/EN60950-1 safety, CE Mark, FCC Class-B, EN55011/EN55022 (radiated and conducted EMI) and EN61000-3-2 harmonics and flicker specifications.

Lambda’s NV-family employs patented Multi-Resonant Topology (MRT) to reduce switching losses and heat generation. These medically approved versions achieve a power density of 9.3W/in³, while the MRT circuitry’s soft-switching characteristics play a role in ensuring that Class B EMC compliance is met.

The NV-175M series are available now with prices starting at $126.00 each in 100 piece quantities.