Following extensive testing, Lambda's compact NV-175 and NV-350 multi-output power supplies have been granted approval to US military standard, Mil-Std-801E. The approval covers the functional shock, transit drop, bench handling, basic transportation and shipboard vibration requirements of the standard.
Demonstrating that the units are capable of withstanding the rough handling and harsh service conditions associated with military use, the tests were carried out on standard power supplies taken from normal production. They included subjecting the units to 40G shocks three times on each axis, a 1.2m drop test on each face of the unit, vibration sweep tests covering the range 10-500Hz, and random vibration tests from 1-50Hz. At the end of the tests, the units were confirmed to be mechanically undamaged and in full working order.
The NV-175 power supplies have a power density of 9.3W/in3 and achieve a continuous power rating of 180W at ambient temperatures of up to 50ºC. They are available with or without a cooling fan, according to requirements. Between one and five independent outputs can be specified, with voltages from 0.9V to 28V.
For applications requiring more power, NV-350 power supplies also feature exceptionally compact construction, but have a maximum continuous rating of 350W. For these units, which are supplied as standard with an integral fan, up to six outputs can be specified.
All of Lambda's NV-series power supplies use the company's Multi-Resonant Topology (MRT), which significantly reduces switching losses and permits higher efficiencies - typically around 90% - to be achieved. The MRT feature includes 'soft' switching, which minimises harmonics and ensures good EMC performance.