DC-DC converters handle demanding environments

3rd March 2015
Mick Elliott

Luso Electronics, the sole UK and Ireland representative for SynQor power supplies and related components has availability of MilQor Hi-Rel DC-DC Converters. Besides military and aerospace applications, the high-reliability products are suited to the extremely demanding environmental electrical conditions of oil, gas and subsea exploration, monitoring and production plus other downhole activities.

This 5W DC-DC converter is housed in a new compact package that is only 1.075 x 1.075 x 0.27 inches (27.3 x 27.3 x 6.85mm). The MQSA-28-05S uses SynQor's innovative QorSeal packaging technology which ensures the high-efficiency synchronous rectifier technology inside can operate at full power operation from –55°C to +125°C. The conduction cooled QorSeal™ packaging employs a gold plated nickel barrier finish on an extruded aluminium case.

The DC-DC converter accepts a continuous input voltage of 16-40V, and it is capable of handling a transient input voltage of 50V for 1 second. This over-voltage transient complies with MIL-STD-704F, RTCA/DO-160G Cat A/R, MIL-STD-1275D (Gen+Bat), and DEF-STAN 61-5 (Part 6)/5 (Gen+Bat) limitations.

Providing up to 5W of power at a typical 80% efficiency throughout the temperature profile, the MQSA-28-05S is a more reliable and cost effective solution than existing hermetic hybrid chip-and-wire converters.

The MQSA-28-05S provides a continuous short circuit and overload protection with input under-voltage lockout, over-voltage shutdown and auto-restart feature. There are no opto-isolators in the converter.

Designed for reliability per NAVSO-P3641-A guidelines with components derated per MIL-HDBK-1547A and NAVSO-P3641-A, and qualified per MIL-STD-810F- consistent with RTCA/D0-160E, the converters are an exceptional choice for low power High Reliability needs. Three separate screening levels are made available for your increasing level of mission critical requirements.


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