AC-DC power supplies have a typical efficiency up to 94%

Paul Boughton

XP Power has developed a 400W AC-DC power supply that just uses convection cooling, reducing size and increasing reliability in indistriland medical applications, writes Nick Flaherty.

The CCL400 series of AC-DC power supplies has been designed to have a typical efficiency up to 94% and a flat efficiency curve over virtually the entire load range and so does not require any forced air cooling. With little heat generated due to the high efficiency, the components within the CCL400 run at lower temperatures, leading to increased reliability and service life.

Unlike products currently in the market, the CCL400 can continuously deliver the full 400 Watt output with convection cooling over the wide temperature range from -40˚C to +50˚C and across almost the entire input voltage range. The CCL400 can also be conduction cooled, enabling the full 400W across the entire input range and up to +70˚C ambient temperature.

Measuring 100.3 x 177.8 x 39.9mm (3.95 x 7.00 x 1.57 inches) the CCL400 complies with the standard 1U chassis mount format. An optional enclosing cover is available to order.

The CCL400 range comprises 4 single-output models that provide the popular nominal output voltages of + 12, + 24, + 30 or + 48VDC. A user trim function provides output voltage adjustment of +/- 3% of stated nominal in order to accommodate load losses. 

The series conforms to the ANSI/AAMI ES60601-1 medical 3rd edition safety standard and also complies with the internationally recognized IEC/UL/EN60950-1 safety standard for IT equipment.

Protection features and control signals include power fail signal, remote sense and remote on/off. A +5 VDC / 0.5 A always-on output is available to power logic circuits.

Typical applications for the CCL400 include medical systems such as life support, imaging and blood processing equipment. In particular, since no cooling fans are used, the units are ideal for medical systems that stipulate low audible noise specifications. The series also suit use in a wide range of industrial and technology solutions that require a very high power density from a convection or conduction cooled power supply.

The CCL400 series comes with a 3 year warranty.