Airborne Surveillance Radar Redesign Uses MI-J00 Converters
A broadly-based major manufacturer of electronic systems offers advanced radar and communication systems for worldwide aerospace, defense, and commercial markets. Their radar systems division manufactures land based, seaborne, and airborne surveillance radars, mostly for complex and critical applications.
One class of radar, designed to operate in manned or unmanned helicopters or fixed-wing aircraft, is designed for search, surveillance, detection and tracking, and other critical missions over water. These missions include search and rescue as well as patrols to detect contraband or illegal immigration, performed under all weather conditions, day and night. These radars, and consequently the power supplies, must be small, light, rugged, and reliable to withstand such long and demanding missions.
Redesign of a multi-mode airborne radar system involved a change not only in the power supplies, but a switch from third-party vendor to an in-house design based on Vicor DC-DC modules and input attenuator modules.
The small size and rugged construction of the M-J00 converters were especially appealing to the designer for this application. The input voltage for this design was 28 volts with multiple output voltages; most of them relatively low power. The outputs were: +20 V at 0.5 A; -20 V at 0.5 A; +15 V at 0.3 A; and +5 V at 8 A. The output voltage can be externally trimmed or programmed from 50% to 110% of nominal output.
The specified MI-J00 DC-DC converter is, of course, fully encapsulated, meets MIL-STD- 810 environmental testing requirements for humidity, fungus, salt-fog, explosive atmosphere, acceleration, vibration, and shock.