XP Power has released MTC, a series of 4 to 35 W DC-DC converters designed as a standard product family exclusively for defence and avionics applications. No compromise has been made in component selection or construction to make it adaptable for communications, industrial or transport applications, acording to XP.
The MTC is a non-custom converter based on commercial off-the-shelf (COTS) components and is available in 5, 15 and 35 W ratings. It offers substantial cost savings over traditional military power supplies says XP. The converter meets the MIL-STD 810F specification for temperature, shock, vibration, bump, altitude, salt fog and other key parameters associated with military applications.
Suitable for systems with a nominal 28 V input, it has a wide input range of 15,5 V to 40 V and can operate through transients of 10 V for 10 seconds and up to 50 V for one second, in accordance with MIL-STD 704B-F. Input immunity, with the complementary filter module (MTF), meets MIL-STD 1275A/B and MIL-STD 704A. EMI performance meets MIL-STD 461E with the filter installed. Single output versions are available with output voltages of 3,3 V, 5 V, 12 V, 15 V or 28 V.
The MTC is fully-featured to minimise external circuitry. It includes an inhibit line, the ability to synchronise with an external frequency source, output voltage programmable by resistor or external voltage, thermal warning 'battle mode' signal on the 35 W units, over-voltage protection and over-current protection. This comprehensive feature set is not typically found in other low power DC-DC converters.
The board-mount power supply is housed in an extruded aluminium case with heat dissipating fins to remove heat by convection plus a base plate for heat conduction. The ambient operating temperature range is -40 to 100°C at the baseplate. The nominal switching frequency of 450 kHz provides the optimum balance of efficiency, power density and EMC performance.
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