Steve Bush August 18, 2021
The goal of Taiwan Cincon Electronics is railway applications, and its 20W dc-dc converter can operate between 10V and 160V.
This series has an ultra-wide input voltage and is suitable for various voltage parameters in different regions," the company said. "Because rail transit will be exposed to harsh environments for a long time, this power converter has passed EN 50155, EN 61373 and EN 45545-2 standard certification. "
Called EC7BW18-xxxxx-ECRT, different versions provide different output voltages: 5, 12, 15, ±12, ±15 or ±24V are available (see the table below). Depending on the version, the efficiency can be as high as 88%.
The suffix ECRT indicates that the chassis is installed with a bottom plate cooling shell, the size is 113 x 59 x 22 mm. There are also chassis and DIN mounting types (EDRT), where 22 mm is increased to 36 mm.
All versions have a remote switch connection, and the single output version includes a control to adjust the output from -20% to 15%.
Features include inrush current limitation, input EMI filtering, and internal holding circuits. Regarding retention, the company told Electronic Weekly: "When fully loaded, that is, 100% of the output power, the input voltage is 24Vdc, and the retention time meets the S2 level of the EN 50155 railway standard."
The company said: "Internal EMI filters can reduce sufficient radiation levels and provide protection against interference from electrical and electronic equipment on railway rolling stock."
The operating temperature range is -40°C to 100°C, the 5V version has a linear derating higher than 67°C, the 12V and ±12V is 74°C, and the other versions are 76°C (0.1m/s natural convection (20ft/min) )).
Protection includes: undervoltage lockout (UVLO), output overcurrent, output overvoltage, overheating and continuous short circuit.
Railway applications are expected to use nominal power sources of 24V, 36V, 48V, 72V, 96V or 110V, as well as distributed power architecture, telecommunications, battery-powered equipment, and industrial applications.
In each case, there are different types with similar specifications
In all cases, the input range is 10 to 160Vdc, and the input-output isolation is 3kVac-the insulation complies with the second edition of UL 62368-1 (enhanced version).
Product page is here, application note is here
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