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Efficient 250W baseplate cooled quarter-brick DC-DC converter

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By Nick Flaherty


With 92% efficiency, the ICQ series from Murata Power Solutions offers 250 W of output power from a quarter-brick format with a 4:1 (9 to 36 VDC) Vin range and is designed for rough service/industrial applications with a specially designed enclosed package that uses baseplate cooling to improve thermal performance.

The electrical and mechanical design allows the ICQ series to deliver the full 250 W output power with a baseplate temperature in the range of -40 to +90°C without derating. In addition, the ICQ is designed to meet the environmental stress limits for shock & vibration specified in MIL-STD-810G throughout its service life. The ICQ0120V1PC achieves its high performance by incorporating proprietary circuit architectures, synchronous rectification, advanced packaging, and thermal design approaches.

Accommodating a wide 4:1 input voltage range for operation from 9 to 36 VDC, the initial ICQ delivers a regulated 12 VDC output rated at 20 A and provides a basic insulation system for galvanic I/O isolation rated at 2,500 VDC. The ICQ has been designed to meet EN60950, UL/CSA safety requirements for embedded power modules.

The industry-standard quarter-brick package measures 39.1 mm x 60.7 mm x 12.7 mm (1.54 x 2.39 x 0.50 inches) and is ideal as a drop-in replacement for lower power less efficient converters. All models come with a positive logic remote On/Off control as the standard configuration, and full protection features including input transient protection to 50 VDC, over temperature shutdown, output over current, and input under voltage lockout.

The ICQ series is scheduled for production release in January 2017; pre-production samples are available upon request.

www.murata.com


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