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e-power Journal > News > Focus > Power Supplies/Energy Storage > New series of DC-DC converters for railway power systems
NewsPower Supplies/Energy Storage

New series of DC-DC converters for railway power systems

Giovanni Di Maria
Giovanni Di Maria November 19, 2022
Updated 2022/12/06 at 3:18 PM
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For railway power systems, TDK Corporation has unveiled the TDK-Lambda CN-110B family of half-brick DC-DC converters. They may be used with nominal DC inputs of 72V or 110V thanks to a 43VDC to 160VDC input range. The baseplate cooled modules are made to comply with EN 45545-2 and IEC 61373 Category 1, Class B shock/vibration regulations for rolling stock (fire protection on railway vehicles). Communications, LED lighting, control, and automated train subsystems are all used in the transportation industry. The decreased internal losses make it easier to cool the module and the surrounding air thanks to efficiencies of over 90% and high efficiencies at low load. The series has larger separation between the input and baseplate of up to 11.76mm to readily handle the surge voltages common on electrified trains. Input to baseplate isolation is 2,500 VAC, input to output isolation is 3,000 VAC, and output isolation is 500 VAC.

There are four available output voltages: 12, 13.8, 15, and 24V. Up to 11 units can be paralleled using the basic modules’ precise current sharing circuit for redundancy or larger power demands. Additionally included are remote sense, remote on/off, and a DC OK signal. Non-threaded mounting holes, a 12V 10mA auxiliary voltage (replacing the DC Good signal), and latching overvoltage and overtemperature protection are available options. With ambient temperature ratings of -40C to +85C, the baseplate temperature range is -40C to +100C. The series weighs 100g and has dimensions of 57.9 mm x 61 mm x 12.7 mm (W x L x H). All models have received safety certification to IEC/UL/CSA/EN 62368-1, are intended to comply with EN 45545-2, and have received CE and UKCA marking in accordance with the Low Voltage and RoHS Directives. They also satisfy the rolling stock IEC 61373 Category 1, Class B shock and vibration standards. The devices also meet IEC 61000-4 immunity requirements and EN 55011-A and EN 55032-A conducted and radiated emissions standards with few external components.

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TAGGED: converter, DC-DC, power
Giovanni Di Maria November 19, 2022
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