30-W DC-DC Converter Complies with Railway Transient and EMC Standards

XP Power has added the RDC30 series of highly efficient metal cased and isolated 30 W dc-dc converters designed specifically for railway applications. Accommodating a wide input range based around the popular railway input voltages of either 72 (36-140) Vdc or 110 (55-176) Vdc, the converters are available with single, dual or triple outputs and conform to the railway industry transient standards EN50155, NF F 01-510 and RIA12. The single output models provide the standard regulated output voltage of 3.3-, 5-, 12- or 15-Vdc, and duals provide ± 5-, ± 12- or ± 15-Vdc. Triple output models provide a 3.3-Vdc output with either ± 12- or ± 15-Vdc outputs, or a 5-Vdc output with either ± 12- or ± 15-Vdc outputs.

These convection-cooled converters have an efficiency rating of up to 91%, and deliver a power density of 37.5 Watts per cubic inch from their compact package measuring 1 x 2 x 0.4 inches (25.4 x 50.8 x 10.16 mm). When convection cooled the operating temperature range is from –40 degrees C to + 75 degrees C. An optional heatsink extends this up to + 80 degrees C. Maximum case temperature is + 105 degrees C. 1,500-Vac Basic isolation between input and output, and 1,600-Vdc between input/output and the metal case is provided across the range.

The RDC30 series complies with the internationally recognized EMC standard EN50121-3-2 as required for railway applications and rolling stock apparatus. A remote On/Off function gives external control of the output while a trim input provides the capability to adjust the output voltage ± 10% of the nominal output voltage. In addition to the 30 Watt RDC30 series, XP Power’s dc-dc converter line-up for railway applications includes the RDQ100/150 series of 100 Watt and 150 Watt base plate cooled converters. The RDC30 is priced at $81.90 for single output models in 500 pcs quantities.