TDK-Lambda Converters Address Railway Applications

TDK-Lambda has expanded its DC-DC converter line with the introduction of the CN-A Series that has a wide 60-160V DC input range, which is widely used in railway applications. Available with nominal output voltages from 5V to 24V (adjustable +/-10 per cent) and power ratings up to 100W, these wide input range isolated power supplies are fully-regulated.

The CN-A DC-DC modules are suitable for both rolling stock and fixed installations, enabling customers to design cost-effective EN50155 compliant systems without the risks associated with custom product designs and in a much shorter timescale. TDK-Lambda also offers a design and manufacture service for customers preferring to buy in complete systems meeting exact electrical and mechanical requirements. Designed for harsh environments, the CN-A Series meets the stringent shock and vibration requirements of IEC61373 Category 1 Class B, as well as the Japanese equivalent standard JIS E 4031.

In addition, all models accept the wide-range DC input commonly found in railway applications, which allows operation from any voltage between 60 and 160V. These baseplate-cooled power supplies, with industry-standard quarter-brick pinout, provide high, true useable power from -40 to +100C, without derating. The CN100A110-24 model, for example, offers up to 88 per cent power conversion efficiency, 60.5W/in3 power density and delivers up to 4.2A useable output current in a package measuring 57.9mm (L) x 36.8mm (W) x 12.7mm (H).

As standard, they are equipped with remote sense, remote on/off and input-to-output isolation of 3,000V AC, as well as overvoltage and overcurrent protection circuitry. All CN-A models are delivered with TDK-Lambda's five-year warranty, are safety approved to UL/CSA/EN60950-1 and carry the CE mark, according to the LV Directive.

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