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Dengrove adds half-brick DC/DC converters for rail

The DC/DC converters deliver up to 120W in the industry-standard half-brick footprint of 61.0 x 57.9mm.


They satisfy EN50155, the harmonised European standard covering electronic equipment for railway rolling stock and comply with the UL and IEC/EN 60950-1 industrial safety specifications. They are suitable for a range of 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% using external trim-up and trim-down resistors, or adjusted via remote-sense inputs.


Protection includes over-temperature, short-circuit, over-current and over-voltage. The converters also ensure user safety by providing 3kV isolation and meeting standards for reinforced insulation. All units are covered with the manufacturer’s three-year manufacturer’s warranty.


The units are fitted with an aluminium heatsink, and operate with case temperature up to 100°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% minimises power dissipation when active.


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