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Programmable 800 and 1500 Watt PSUs provides constant current output down to almost zero volts

XP Power today announced the HDS series of 800 and 1500 Watt highly efficient programmable AC-DC power supplies. With a typical efficiency of up to 93%, these single output low profile supplies measure 249.0 x 127.0 x 40.9 mm (9.80 x 5.00 x 1.61 inches) for the 800 Watt models and 280 x 127 x 63.5 mm (11.02 x 5.0 x 2.5 inches) for the 1500 Watt range and fit into an industry standard 1U or 2U profile. Two front mounted variable speed fans, included in the above dimensions, help conserve energy and keep noise to a minimum. The power density of these compact units is greater than 10 Watts per cubic inch.

Both the output voltage and output current are programmable from 0% through to 105% of stated nominal through a serial RS232 interface, I2C interface, a 0 to +5 VDC input or via an external potential divider. By programming the output current a true constant current output is achieved down to almost zero volts, this being significantly better than the industry norm which is typically only down to 20-40%.

The HDS series comprises seven models covering the popular nominal outputs from +12 to +60 VDC. The output voltage for both series can also be manually adjusted +/- 5% by a trim function in order to make up for line losses. Both ranges also provide a user selectable standby output of 5 VDC / 0.5 Amp or 9 VDC / 0.3 Amp when the AC input is present.

The units include a comprehensive set of signals and controls such as remote on/off, AC OK, remote sense, PWM switching and overtemperature shutdown. A multifunction LED indicates the power supply status and gives warning notifications through use of different colours and blinking rates. In addition, I2C serial data connections provide for bi-directional data transmission between the power supply and external monitoring / controlling equipment.

A current sharing function provides for parallel operation of up to five power units for applications that might require a higher output power or for redundancy purposes. This also allows for system scalability of any future increased power requirements. Accommodating the full universal input voltage range of 90 - 264 VAC, the HDS800/1500 is suitable for world-wide use. They have an extended operating temperature range from -10 degrees C to +70 degrees C (+60 degrees C for HDS1500) with no derating until +50 degrees C. The series is approved to the internationally recognised safety specification IEC 60950-1 for ITE, industrial and commercial equipment. The units also comply with EN55022 Class B specification for conducted and radiated EMI.

Typical applications for the HDS800/1500 include use in semiconductor manufacturing equipment, battery charging and automatic test equipment. The HDS800/1500 is available from approved regional distributors, or direct from XP Power and come with a 3 year warranty.

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