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Power system for low voltage military, avionics, and space applications said to be most efficient
31 May 2006, Power Electronics / Power Management

A new power system, claimed to be the most efficient DC-DC distributed standard power solution available to satisfy the unique requirements of military, avionics, and space applications, is available from Eagle Technology.

The new HERO (high efficiency, reliability optimised) Power System combines an isolated, high efficiency, high power DC-DC converter with a set of new, small-size point-of-load DC-DC converters in a complete system to power low-voltage devices. The result, claims the company, is a new power system that delivers more power, with military-grade reliability, while requiring less space and cost than any high reliability solution previously offered for these demanding applications.

For anyone with a critical reliability application, such as an aircraft, blended systems often require expensive custom modifications and extensive testing cycles to satisfy reliability standards. The compact HERO solution is said to be easily configurable, off-the-shelf, and built specifically to meet the extensive reliability and performance needs of users in military, avionics, and space areas.

Previously, says Eagle Technolgy, multiple DC-DC converters or a combination of converters and linear regulators would be used to deliver the low voltages needed to power digital power boards. However, these components in combination can be extremely inefficient and result in significant power loss during the conversion process. Additionally, off-the-shelf linear regulators are usually not built to the extremes required for military/aerospace applications and can experience reduced system reliability.

A more efficient solution

The HERO Power System is a complete DC-DC power system in which all modules are available to military and avionics specifications including temperature range, hermeticity, and screening. It consists of two modules: the DVHE DC-DC power converter, and the DVPL point-of-load converter, a non-isolated, synchronous, buck-regulated converter that steps down the voltage at the point of end use. Multiple DVPLs can be powered from a single DVHE.

The DVHE delivers 50 W (10 A) in a standard hermetic case at more than 90% efficiency. Engineers can use a single DVHE to power multiple low voltage devices instead of deploying multiple DC-DC converters.

All modules are available to MIL-PRF-38534 standards for use in critical reliability applications. The DVHE delivery of high power results in the need for fewer modules and fewer interconnects, which inherently increases system reliability. Fewer modules means space needed on a board and less cost.

All modules in the HERO Power System operate within the military temperature range of -55-125°C with no derating of either input voltage or output power. The system's high power, reliable performance, and smaller space enable engineers to produce a more efficient power design overall.

For more information contact Henry Haynes, Eagle Technology, +27 (0)21 423 4943,

Supplied By: Eagle Technology
Tel: +27 21 423 4943
Fax: +27 21 424 4637
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