Autronic DC/DC converters for rail are available from Components Bureau
Two 20W brick DC/DC converters for railway projects from Autronic, the AER20-W and AER20-DW, offer input ranges from 8.5 to 160V.
The compact 20W power supply is designed for harsh applications and suitable for the railway with an input range of 18:1. They are the latest edition of Autronic’s AER galvanically isolated DC/DC converters. They are supplied in a sealed housing, measuring 2.0 x 1.0 inch (50 x 25mm). The bricks have been specifically designed for harsh environments, such as railway systems, battery powered equipment, measuring instruments and displays.
The AER20-W and AER20-DW offer an input range from 8.5 to 160V in a single device. This allows the nominal input range of 12 to 110 V including tolerances (-30 and +45 per cent) to be covered with only one device. It also facilitates the design-in of the power supply, notes Components Bureau.
The AER20-W offers high efficiency up to 88 per cent with the option of a heat sink, for improved heat dissipation for higher thermal requirements.
The small power supplies are designed for use in the temperature range from -40 to +85 degrees C (case up to +105 degrees C). With natural convection, the converter can be operated up to 67 degrees C without derating.
Safety functions, such as over-current protection, over-voltage protection are integrated. The DC/DC converters are also short-circuit-proof and have a low no-load current consumption. The power supply can be controlled via remote on/off.
They also feature a high I/O isolation with 3,000V AC with reinforced isolation. The AER-20W meets the environmental requirements of shock/vibration according to EN 61373 category 1 class B, dry and wet heat according to EN 60068-2-1, 2, 30 and the EMC standard EN 50121-3-2 for rail vehicles(with external filtering components), as well as the railway standard EN 50155. Fire tests have been performed according to EN45545-2. Versions for the nominal railway voltages of 24 to 110V are available.
In addition, the converter can be used for 12V applications, as the converter can be operated up to 8.5V permanently. The converters have an accurate output voltage regulation of up to one per cent. For the dual output version, the voltage balance is ± one per cent. The single output versions are available with voltages of 5.0, 12 and 15V. Versions with dual output are also available, with output voltages of ±12, ±15 and ±24V. The output voltages of the single output version can be trimmed -20 and +15 per cent.
