Specialist distributor, Relec Electronics, has added the CHB150W12 and CHB200W12, wide input DC-DC modules.

The CHB150W12 (150W) and CHB200W12 (200W) half brick DC-DC converters have an ultra-wide, 12:1 universal input range of 14-160Vdc. They are rugged, making them practical for use in railway applications, distributed power architectures, telecommunications, battery operated equipment and industrial applications.

Both families meet the railway standards EN62368-1, EN50155 and EN45545-2, but the modules can also be used in a variety of applications where operation from multiple DC supplies is beneficial, for example in medical, broadcast, robotics and agricultural designs.

The DC-DC converters are available with 5V, 12V, 15V, 24V or 48V outputs and have 3000Vac reinforced input to output isolation as standard. Units operate with efficiencies up to 91% and case temperatures range from -40°C to +100°C.

Standard control functions include remote on/off with either positive or negative logic, adjustment output voltage from -20% to +15%. There is also a user settable under voltage lock out facility as well as output over current, output over-voltage, over-temperature and continuous short circuit protection. Optional heat sinks are available to extend the full power range of the modules. Multiple modules can be connected to create larger systems which have the ability to synchronise output ripple using an external clock and the sync control pin.

Hold up time can be managed across the entire input voltage range by connecting capacitance to the bus control pin, for a system that fully complies to the requirements of EN50155 with any input supply voltage.

The conduction-cooled DC-DC half brick converters offer new possibilities for rail and industry power supplies with the benefits of conduction cooling including primarily lower maintenance and improved reliability due the elimination of moving parts when compared to fan operated supplies, says Relec. They can also be used where a fan is not practical, as it may risk blowing conductive dust into the electronic system. In all applications, good thermal design can reduce component temperatures and increase reliable operation.

Full application support is available, including recommended PCB layouts, external heatsinks or detailed thermal profiling. There is also support for series or parallel connection, and redundant operation.