50-Watt DC-DC Converters for Railway and 24V Vehicle Apps

-July 24, 2013

Baseplate-cooled quarter-brick modules address 50W demand for railway applications


TDK Corporation introduced the CN50A24 series of 50W railway DC-DC converters.  These quarter-brick modules operate off a wide range of DC inputs from 14.4 to 36.0VDC, which is widely used in the railway industry and for 24-volt vehicles.  Available with output voltages of 5V, 12V, or 24VDC (adjustable ±10%), these are fully-regulated and isolated power modules. 


The modules are suitable for both rolling stock and trackside equipment, enabling users to design IEC61373 compliant systems without the risks associated with custom product designs and in a much shorter timescale. In addition, 100W versions of these converters are included in the series.  TDK-Lambda also offers higher input range versions of these modules, the CNA-110 series, with an input range of 60 to 160Vdc and output ratings from 30W to 200W.


Designed for very harsh environments, the series meets the stringent shock and vibration requirements of IEC61373 Category 1, Grade B.  In addition, a conformal coating option (add /CO suffix to model number) complies with the EN50155 requirements. These baseplate-cooled power converters provide full output power from -40 to +100°C at the baseplate without derating. The 50-watt model CN50A24-12, for example, delivers 4.2 Amps at 12VDC with a conversion efficiency of 86% at full load.  These quarter-brick modules measure 1.45 x 2.28 inches and are only 0.50 inch high.  


As standard, the units are equipped with remote sense, remote on/off, overvoltage and overcurrent protection circuitry and include TDK-Lambda’s 5-year warranty.  All models have an input-to-output isolation of 3kVAC, are safety-approved to UL/CSA/EN60950-1 and carry the CE mark in accordance with the LV Directive.


More information can be obtained at the following TDK-Lambda Americas website, http://www.us.tdk-lambda.com/lp/products/cn-series.htm, .

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