DC/DC converters operate from –40°C to 110°C

Luso Electronics Distribution has rolled out the SynQor RailQor series of DC/DC converters that offer full power operation without a heat sink at 85°C under no-airflow conditions. The company added that the devices are geared for demanding thermal environments of transportation applications.

The converters is designed to provide isolated DC power for applications such as LED displays, audio amplifiers, safety monitors, lighting and communications systems that meet the EN50155 European Standard. These fixed-switching frequency converters use SynQor's synchronous rectifier based technology to achieve extremely high efficiency, noted Luso Electronics.

The series' power dissipation has been reduced at very light loads, resulting in efficiencies exceeding 85 percent at as little as 10W output and 93 percent at full load. Minimal power dissipation allows the series to deliver up to 50W with no derating. The full operating temperature range is from –40°C to 110°C baseplate temperature with airflow, or up to 125°C in natural convection environments.

Nominal input voltages include 24V (9-36V), 68V (12-160V), 72V (42-110V) and 110V (66-160V) with output voltage offerings of 5V, 12V and 24V. Each module is completely encased to provide protection from harsh environments, and is available with an optional flanged style baseplate.

Features include remote on/off control, 10 percent to -20 percent output voltage trim range, remote output voltage sense, input undervoltage lockout, output overvoltage protection, active back bias limiting, thermal shutdown, output current limit and short circuit protection. The series is designed for up to 3000VDC and 100MΩ input-to-output isolation, is RoHS 6/6 compliant and is rated with MTBF values in excess of 1 million hours at 70°C (MIL-217).

The RailQor series of products are now available from Luso Electronics in quarter-brick packages for evaluation and qualification. Production quantities are available with 8-10 weeks lead-time depending on volumes.