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Power Electronics Europe News
Wide input range DC/DC converters are for railway applications

The DC/DC converters are- power dense and cost-effective, says the company.  The regulated, isolated 36 to 160V input (200V/1 sec) DC/DCs have a 40W output in an industry-standard 2.0 x 1.0 x 0.4 -inch (50.8 x 25.4 x 10.2mm) board-mount through-pin package. The RPA40-FR series includes rail nominals of 72V, 96V, and 110V with surges and dips. Low-noise, single and dual outputs available are 5.0V, 5.1V, 12V, 15V, 24V, ±12V and ±15V with the single outputs’ trimmable minimum ±10% (15 and 24V models are trimmable to 20/-10%). No minimum load is required.

Efficiency peaks at 90% which, along with advanced thermal design, allows operation with natural convection to high temperatures without derating up to 105°C ambient with reduced load and/or airflow. Safety features include over-temperature, input under-voltage, output over-current and short circuit protection. A control pin is also provided to shut down the DC/DCs into a low dissipation state.

Safety certifications held by the products include UL/EN/IEC 62368-1, EN 45545-2, and EN 50155, with a reinforced isolation rating of 3kVAC/1 min. EMC specification EN 55032 class A is met without external components while class B can be met with a simple external filter network. Reliability is high with an MTBF of 1.25MHrs at 25°C according to MIL-HDBK 217-F (GB), characteristics which make the encapsulated DC/DC converters suitable for harsh rail environments as well as for general industrial use, advises the company.

Parts include a three-year warranty, and samples and OEM pricing are available from all authorised distributors or directly from Recom.

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