Railway DC-DC Power Converters and Filters

Isolated DC-DC Converters for the Rail Transportation Industry

The RailQor^® converter series is composed of next-generation, board-mountable, isolated, fixed switching frequency DC-DC converters that use synchronous rectification to achieve extremely high power conversion efficiency, even at low output power levels. The Quarter-brick 25-50 W Mega Series has power dissipation so low that no heatsink is necessary to operate at 85°C in an enclosed environment without airflow. Each module is supplied completely encased to provide protection from the harsh environments seen in many industrial and transportation applications.

General Specifications

• Operating Temperature -40ºC to +100ºC
• Output Voltage Set Point ±1.0%
• Output Voltage Ripple <1% of Vout (typ.) pk-pk
• Switching Frequency 240 - 350 kHz
• Output Voltage Trim Range +10% to -20% / +10% to -50% (HZ only)
• Isolation Voltage Up to 3000 Vdc
• EN50155 Compliance
• RIA 12 Compliance with external circuit Industry standard pin-out configurations and standard footprints

Protection/Control Features

• Input under-voltage lockout
• Output current limit and short circuit protection
• Active back bias limit prevents damage to converter
• Output over-voltage protection
• Thermal shutdown

Operational Features

• High efficiency at full load up to 93%
• Quarter-brick 25-50 W Mega Series has no derating in environments with zero airflow and ambient temperatures up to 85°C with no heatsink
• Input voltage ranges: 9-36 V, 18-45 V, 18-75 V, 42-110 V, 12-155 V, 34-160 V and 66-160 V
• Input voltage ranges meet the requirements of EN 50155
• Full power operation at baseplate temperature range from -40°C to 100°C.
• Output power up to 500 W
• Fixed frequency switching, low output noise
• No minimum load requirement
• Encased module to provide protection from harsh environments and available with optional flanged style baseplate.
• Digital Output Current Sharing (HZ only)