New additions to defence DC-DC converters

SynQor, Inc. offers new additions to its MCOTS product line: the MCOTS-C-270-40-HE and MCOTS-C-270-60-HE. These new compact, high-efficiency, high-power, half-brick DC-DC converters are based on the next-generation, isolated, fixed-frequency synchronous rectifier technology. The superior power density of these modules provides for more efficient layout optimisation, where space is a critical consideration. These MIL-STD-704-compliant converters are capable of down-converting 155-425VDC input voltage to an adjustable output between 10-40VDC for the MCOTS-C-270-40-HE or 24-60VDC for the MCOTS-C-270-60-HE. Also, these converters provide an adjustable current limit feature that enables them to power near infinite capacitive loads or a battery. When the load current demand exceeds the set current limit, the unit behaves as a constant current source, delivering constant current independent of the output voltage. Below the set current limit, the unit acts as a regulated voltage source, providing a fixed regulated voltage to the load. The designer can specify the output voltage via trim resistors or by adjusting the voltage into the voltage set pin. As with the company's other Mil-COTS products, these converters deliver extremely efficient high-power conversion across its complete output power range, with low power dissipation enabling full-load operation at temperatures as high as 85C.

The devices come fully encased in the company's proprietary ruggedised packaging, permitting them to operate in the harshest defence conditions, including applications such as radar/pulse loads, battery charging, electronic defence, RF power amplifiers, solid-state lasers, UAV/UUVs, rotary wing applications, and much more. These modules also include an array of advanced features such as serial communication for module configuration and monitoring, active current share for paralleling converters, external clock synchronisation to enhance EMI performance, and a battle short feature that overrides the over-temperature shutdown functionality in applications where the module requires to operate in conditions beyond the intended temperature range. The field-proven, highly reliable technology shortens design cycles and helps designers/integrators yield reliable solutions for the defence and aerospace markets.