Half-brick DC/DC converters are stable and efficient for rail applications

EN50155-compliant DC/DC converters available from Dengrove Electronic Components now include the Recom RPA120H-RW, which delivers up to 120W in an industry-standard half-brick footprint measuring 61.0 x 57.9mm.

In addition to satisfying EN50155, the European standard covering electronic equipment for railway rolling stock, the RPA120H-RW also complies with the UL and IEC/EN 60950-1 industrial safety specifications, making it suitable for communication, control and monitoring applications.

 The single-output converter can be specified with either 12, 15 or 24V output voltage, and has a wide 4:1input-voltage range spanning 53 to 154V. Tight output-voltage regulation, with ripple and noise below 100mVp-p, ensure stable power for sensitive equipment deployed in challenging environments, says the company. The output voltage can be trimmed by ±10 per cent using external trim-up and trim-down resistors, or can be adjusted via remote-sense inputs.

Over-temperature, short-circuit, over-current and over-voltage protection are built in, and the converters also provide 3kV isolation and meet standards for reinforced insulation.

 RPA120H-RW converters are supplied with an aluminium heatsink fitted, and capable of operating with case temperature up to 100 degree C. They can be specified with an active-high or active-low control pin output, and also provide the option of output gating that provides a convenient means of powering-down the load to save energy while allowing fast wake-up from standby. Full-load efficiency of up to 88.5 per cent minimises power dissipation when active.

All units are covered by the manufacturer’s three-year warranty.



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