Configurable AC-DC power supplies from Lambda

The new digitally controlled modules incorporate many innovative design features including a new integrated magnetics transformer that allows for small size and increased efficiency. The digital control allows customisations based on the application’s requirements (such as modified current limit or start-up characteristics). Additionally, input to output isolation meets the 4kVac reinforced requirement for medical use.

NV-Power employs an 8-bit microcontroller to handle housekeeping routines, replacing the array of comparators, op amps and other discrete components used in less integrated designs. This brings a 50% parts count reduction which in turn allows 40% more board space for power components. With the incredibly high peak power rating designers can realise power densities of up to 19W/in3 from a 1U unit measuring 125mm by 250mm.

The NV-350 range offers up to 600W continuous output power (750W peak for 10 seconds) from up to six configurable outputs. Lambda’s Multi Resonant Topology (MRT) and other EMC improving design features give curve B EMC performance with earth leakage current less than 300µA at 264Vac, 63Hz (meeting the requirement for IEC/EN/UL60601-1).

The NV-700 range offers up to 1150W continuous output power (1450W peak for 10 seconds) from up to eight configurable outputs. Of particular note, the new, digitally controlled single-output ‘C’ module is three slots wide and available with 12V, 15V and 24V outputs offering 450W continuous and 600W peak power for up to ten seconds. Each module features output good and inhibit signals with the power supply offering low leakage current and EN55011/55022 curve B EMC as standard.

Available with an extensive range of output modules and options, it is possible to achieve a wide range of output voltage and current combinations. Using the Lambda NV-Power Configurator, designers can create their own configuration online at www.nv-power.com. This tool checks your configuration and offers the optimum solution with fully approved samples available on short lead times. All outputs are fully isolated and no minimum load is required.

Cooling is a choice of customer air or low noise temperature controlled fans. Additionally, the NV350 is available with reverse air cooling. Low profile output connectors allow maximum airflow for optimised cooling efficiency.

Outputs covering the 3.2V to 64V range are available as well as 5V / 2A and 12V / 1A ATX compatible standby outputs. NV-Power employs Multiple Efficiency Gain (MEG) technology to produce a class leading efficiency of up to 90% depending upon the configuration.

All products in Lambda’s NV-Power range are approved to IEC/EN/UL 60950-1 for general purpose applications as well as IEC/EN/UL 60601-1 for medical applications, and IEC/EN 61010-1 for laboratory and process control applications. In addition, the units carry the CE mark and come with a three-year warranty.