650W front-end power supply in compact outline

February 16, 2016 // By Graham Prophet
Murata’s D1U54P-650-12-HBxC series of 650W power supplies comes in an industry standard 1U format measuring 54.5 x 40 mm; it has a length of 228.6 mm (9 in.) compared to the 12-in.length of other power supplies in this family.

Representing a power density of 21.4W per cubic inch, this compact power supply exceeds the 80 PLUS Platinum efficiency requirements. With a single 12 VDC primary supply it also provides a standby 12 VDC / 2A output.

These hot pluggable units are capable of N+1 redundancy and feature an active current sharing (ORING FET) permitting connecting up to a maximum of 8 in parallel. Control features include an I ²C compliant PMBus interface and front panel LED status indicators. Overvoltage, overcurrent and over temperature protection is included across the range. Forced air cooling is facilitated by a low noise variable speed fan and the direction of air flow can be front to back or back to front. The D1U54P-W-650 is an AC input unit accommodating the full universal input range from 90 to 264 VAC. A DC input model, D1U54-D-650 is also available in same size. The series is aimed at distributed power architecture applications.

Murata Europe; www.murata.com