DC/DC converters AER-20W and AER-20DW

AER-20W and AER-20DW: compact 20 W power supply for harsh applications and the railway with an input range of 18:1!

The brand new bricks of the AER-20W series from AUTRONIC are a series of galvanically isolated DC-DC converters with 20 W power in a sealed housing. Autronic specifically designed the 2″x1″ bricks as reliable solutions for applications such as railway systems, battery-powered equipment, measuring instruments, displays, and many other applications with harsh requirements.

Absolutely unique is the input range from 8.5 V up to 160 V in a single device. This allows the nominal input range of 12…110 V including tolerances (-30 % and + 45 %) to be covered with only one device and facilitates the design-in of the power supply.

Functions and features

The high efficiency of up to 90 % simplifies use in thermally critical applications. The EMC according to EN 50155 is fulfilled with standard external components. The DC/DC converters are optionally available with a heat sink, thus ensuring even better heat dissipation for higher thermal requirements. The small power supplies are excellent for use in the temperature range from -40°C to 85°C (case up to 105°C) and thus meet the requirements of class TX. With natural convection, the converter can operate up to 67 °C without derating.

Requirements and testing

The voltage converters have many protective functions integrated, such as protection against overcurrent, overvoltage and the DC/DC converters are also short-circuit-proof and have a low no-load current consumption. Furthermore, experts can control the power supply via remote ON/OFF. Further features are high I/O isolation with 3000 Vac 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 according to EN45545-2 were successful.

Available uses

Versions for the nominal railway voltages of 24…110 are available. In addition, the converter can adapt for 12 V applications. This happens as the converter can operate up to 8.5 V permanently. The converters have an accurate output voltage regulation of <1 %. For the version with dual output, the voltage balance is ± 1.0 %.

The single output versions are available with voltages of 5V, 12V, and 15V. Versions with dual out-put are also available, with output voltages of ±12 V, ±15 V, and ±24 V. The output voltages of the single output version can be trimmed with -20 % and +15 %.

Customers can immediately order the converter, as sample quantities are available from stock.

Feel free to contact the experts at dimacred@dimacred.com or call the headquarter.

General information at www.autronic.de