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Isolated DC/DC converters ease module use in OEM apps

Posted: 29 Sep 2008 ?? ?Print Version ?Bookmark and Share

Keywords:DC/DC converter? OEM? network application?

HPH, UCH Series

Murata Power Solutions has added two ranges of single output, half-brick, isolated DC/DC converters to its product offerings.

The HPH series is a family of ultrahigh output converters with different models capable of delivering up to 360W of power and 70A output current. The UCH series has modules that deliver between 50W and 150W of output power and a maximum output current of 40A.

Both the HPH and UCH series are isolated to 2250Vdc with an open-frame construction and are designed for PCB mounting. Both series are in compliance with RoHS legislation, and have UL60950-1 and EN60950-1 safety approvals.

HPH DC/DC converters give a choice of fully regulated single outputs ranging from 3.3Vdc to 12Vdc. A wide input voltage range of 36Vdc to 75Vdc, along with an industry standard pinout and package measuring 61mm x 58.4mm x 10.2mm, simplifies the use of the modules in low voltage, high current OEM applications.

The converters take a full-bridge, fixed-frequency topology, together with synchronous output rectification, that achieves levels of efficiency up to 91 percent. The operating temperature ranges from -40C to +85C. An optional base plate further improves thermal performance.

The UCH series is given with outputs from 2.5Vdc to 15Vdc and a choice of either 36Vdc to 75Vdc or 18Vdc to 36Vdc input voltages. Module footprint and installed height are similar to the HPH series. UCH series DC/DC converters are used for demanding telecom, datacom and networking applications with their semisynchronous rectifier design enabling them to reach efficiency levels of up to 92 percent. By using an optional base plate, the thermal performance can be further enhanced.

Remote sense, output trim and primary side on/off control with either positive or negative logic are part of the design in both new product series. The design in both series offers short circuit protection and thermal shutdown, plus input under-voltage and I/O over-voltage protection.

- Ismini Scouras

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