Cost-effective DC-DCs suited to railway applications

DC-DCs for rail applications generally function from 72V, 96V, or 110VDC nominal input with dips and surges. To meet this application, RECOM’s new, cost-effective RPxx-RAW range of isolated, regulated converters provide an ultra-wide 36V to 160VDC input (200V for 1s) with a section of single and dual outputs: 3.3V, 5V, 12V, 15V, 24V, +/-5V, +/-12V, and +/-15V. The RP03-RAW series is rated at 3W output, the RP06-RAW at 6W, and the RP10-RAW at 10W. All parts are in a common through-pin encapsulated DIP24 industry-standard format 31.8mm x 20.3mm x 10.6mm high.

The series includes advanced circuit and thermal design techniques producing high efficiency and low internal temperature rises, allowing an operation to high ambient temperatures at full load, convection cooled with no derating: 90C for the 3W part, 85C for the 6W part, and 75C for the 10W part. With derating, all parts operate up to 105C. Full protection is included against input under-voltage, over-temperature, output over-voltage, short circuits, and over-current. A shutdown control is also provided.

The isolation rating for the parts is reinforced 3kVAC and certifications include EN50155 and IEC/EN/UL62368 and the Canadian equivalent. EN55032 class A EMC specification is met without further components while class B level can be met with an additional three small, external capacitors.

“These DC-DCs are ideal as auxiliary supplies in the harsh rail environment,” comments Matthew Dauterive, DC-DC product manager of RECOM. “They could also be used in wider industry where higher supply voltages are seen, such as in battery management systems, electric forklift trucks, and IoT sensors.”