Half-Brick DC-DCs for High-Rel Industrial and Railway Applications

Murata has launched its latest encapsulated dc-dc converters, designed specifically for use in industrial and railway applications. The 150-Watt IRH series from Murata Power Solutions provides market-leading power conversion efficiency, in an industry-standard half-brick pinout, using the latest component and packaging technologies in a fixed-frequency switching power supply architecture. The IRH series offers the user flexibility and reliability in design implementation.

The IRH series delivers 5V, 12V or 24Vout from an input voltage range of 57.6V - 160V with reinforced I/O galvanic I/O isolation rated at 3,000Vrms. The half-brick, industry standard packaging offers options for electrical connections and mounting for thermal management in your latest system designs.

The IRH series is designed for the highest reliability, incorporating the latest circuit technologies along with proprietary packaging and thermal management techniques to deliver a product that meets critical environmental requirements for industrial and railway applications. The modules incorporate many features to protect the power module from fault conditions and also expensive end use equipment.

Protection features include input under voltage lockout, output overvoltage protection, output current limit, short circuit (hiccup mode) and over temperature shutdown. Available options include various pin lengths, pin functions and baseplate cooling options.

Features

• 3:1 Vin range of 57.6Vdc to 160Vdc
• Delivers 5V, 12V or 24Vout with 3,000Vrms input to output isolation
• Designed and tested to meet the requirements of EN50155
• Available with standard and flanged baseplate options, and with DOSA or alternate industry standard pinout options
• Standard features include on/off logic control and protection against short circuits, overvoltage and over-temperature
• Efficiency ratings of 91% at 5 Vout, 89.5% at 12 Vout and 89% at 24 Vout

Benefits

• Encapsulated circuit design makes them shock- and vibration-tolerant and improves EMI and thermal performance
• Meets the requirements of the EN50155 standard for railway applications for a nominal Vin of 96 Vdc and 110 Vdc
• Topology supports a pre-biased output at start-up, eliminating the reverse currents during system start and shutdown that can damage critical circuitry