Power Electronics / Power Management


Power supplies with convection or fan cooling

28 May 2008 Power Electronics / Power Management

XP Power’s SDC320 AC-DC power supply offers a choice of four formats, two using convection cooling or system airflow and two with internal fan cooling.

The compact 320 W unit, measuring just 101,6 x 152,4 x 38,10 mm, is suitable for 1U applications and is available with a vented cover if required. For applications where there is insufficient airflow, two fan-cooled models are available. These have the fan mounted on the end or the top of the unit's enclosure, and offer a choice of space-saving vertical or horizontal mounting.

For applications requiring short durations of higher power, such as starting a motor, the unit makes a cost effective choice with its 700 W peak power rating. This feature saves engineers having to specify a larger and more expensive power supply.

The SDC320 series includes 11 single- and four dual-output models. Single output units cover all popular voltages from +5 to +60 V d.c., while dual output versions provide +5, +12, +24 and +48 V d.c. combinations. Output 1 on all models can be trimmed by ±5%. All models operate from 0 to 70°C, with derating above


50°C. Power output of up to 170 Watts is possible with convection cooling only.

The power supplies meet FCC Part 15 and EN55022 Level B for both radiated and conducted emissions. No additional filtering components are required, saving both space and cost. The units comply with UL60950-1 and EN60950-1 safety approvals for industrial, commercial and IT equipment. User connected equipment can be alerted to impending power or fan failure by use of the Power Good and Fan Fail signals.

For added flexibility, designers can choose between a screw terminal or Molex connector option for input/output terminations. A low leakage option is also available.



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