Hi-Rel Converters

High-Reliability, Field Proven DC-DC Converters for Military/Avionics Applications

The MilQor^® series of high-reliability DC-DC converters brings SynQor’s field proven high-efficiency synchronous rectifier technology to the Military/Avionics industry. SynQor’s innovative QorSeal^® packaging approach ensures survivability in the most hostile environments. Compatible with the industry standard format, these converters operate at a fixed frequency, have no opto-isolators, and follow conservative component derating guidelines.

Hi-Rel Product Features

• Fixed switching frequency
• No opto-isolators
• Parallel operation with current share on MQFL
• Remote sense
• Clock synchronization
• Primary referenced enable
• Secondary referenced enable on MQFL
• Continuous short circuit and overload protection with auto-restart feature
• Input under-voltage and over-voltage shutdown
• Output voltage trim range (MQHL, MQHR and MQBL) +10% to -10%
• -55°C to +125°C Operating Temperature

Design Process

• Hi-Rel series converters are:
• Designed for reliability per NAVSO P-3641A guidelines
• Designed with components derated per:
  • MIL-HDBK-1547A
  • NAVSO P-3641A

Qualification Process

• Hi-Rel series converters are qualified to:
• MIL-STD-810: consistent with RTCA/DO-160
• SynQor’s First Article Qualification: consistent with MIL-STD-883
• SynQor’s Long-Term Storage Survivability Qual.
• SynQor’s on-going life test
• SynQor’s element evaluation for HB and ES Grade

Specification Compliance

• Hi-Rel series converters (with Hi-Rel filter) are designed to meet:
  • MIL-HDBK-704
  • RTCA/DO-160 Section 16, 17, 18
  • MIL-STD-1275
  • DEF-STAN 61-5 (Part 6)/(5, 6)
  • MIL-STD-461
  • RTCA/DO-160 Section 22