Configurable power supply outputs up to 1200W from 1U profile

New Products |
By Graham Prophet

Designed to maximize efficiency and minimize audible fan noise, the nanofleX series can deliver up to 850W from a universal input voltage or up to 1,200W from a high line source. The four output module slots provide nineteen nominal output voltage options in the range + 3.3 to + 60 VDC. Outputs are derived from one of four base, digitally controlled, modules that each span a wide voltage adjustment range. This approach provides ultimate flexibility and user adjustment to tailor the product to the end application and supports fast turnaround delivery of products configured to exact user requirements, from stock held in several XP Power locations worldwide.


The architecture of the supplies uses a three-stage switching layout. The universal AC/DC front end has a bridge-less, interleaved power-factor-correction input that uses 65kHz switching. The primary switching, LLP resonant stage runs at around 120 kHz and employs a single, planar isolation transformer. Rather than rectifying the transformer output to a single intermediate bus, the secondary windings of the isolation transformer are available to each output module, and plug-in selection connects the secondary taps appropriate to the individual output selected. Each output module carries out synchronous rectification of the isolation transformer feed, followed by a 250-kHz switching buck or boost conversion to the final output. XP chose to offer a four-output format as its research indicated that the great majority of typical applications require three or four rails.


Cooling fans are positioned in the centre of the product further reducing audible noise and allowing users to specify the airflow direction to suit their application. The full output power rating is available regardless of airflow direction.


The nanofleX platform supports both analogue and digital control, although the conversion control loops within the supply are analogue; the main regulation function is on the primary side of the main converter. The analogue signals include AC OK (global), DC OK (global and local module) in addition to remote On/Off (global and local), voltage adjustment, remote sense and current share controls. The digital functions use a subset of the industry standard PMBus command protocol that include digital equivalents of all the analogue signals and controls together with over voltage, over temperature, over current and fan fail warning functions.


A Graphical User Interface (GUI) allows the control and configuration of the nanofleX via an I²C interface using the PMBus commands, allowing users to interface with the power supply from day one and further refine the nanofleX configuration during the system development phase.


The nanofleX complies with the internationally recognised medical and IT safety approval standards IEC/EN/ANSI/AAMI 60601-1 and IEC/EN/UL60950-1. It provides 2 x MOPP according to the 3rd edition of the medical safety standard. The nanofleX series comes with a 3-year warranty.


XP Power;




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