PMBus 600W DOSA Compliant, Quarter-Brick DC-DC Converter



Murata has launched a series of 600W, DOSA compliant, 12V output, digital quarter-brick DC-DC converters from Murata Power Solutions. The series was designed for The DSQ, DCQ and DAQ converters support the full ‘TNV’ input range of 36 – 75V, with a typical efficiency of 96 % @ full load 48Vin.

The series is designed to support droop mode current sharing of multiple modules for increased power output with tight load sharing.  I/O Isolation is 2250 VDC, with a functional insulation system and it carries the UL/CSA safety agency approvals. Options for these modules include a digital interface supporting the latest PMBus command set, parallel load sharing, positive or negative on/off logic, along with options for standard “analog” DOSA pinout and a 5pin Bus Converter pinout. Application examples include telecommunications networking equipment, computing equipment, wireless base stations, PoE systems, MicroTCA, fan trays and test equipment.

The DSQ model includes a PMBus interface that provides a means (I2C Bus) to configure output voltage, soft start parameters, input and output over-voltage protection limits, input under-voltage lockout, current limit and thermal shutdown.  Telemetry functions include output voltage and current, input voltage and temperature, as well as indications for ‘power good’ and on/off status. The heart of the module is a 32-bit processor controlling all functions and parameters. To support the PMBus, Murata Power Solutions is offering an optional evaluation board that is supported by downloadable software with a user-friendly GUI. The evaluation boards and a GUI manual are available upon request.

The DSQ modules are designed, tested and qualified according to mounting an additional heat sink for extreme temperature applications. Safety certifications include UL/EN/IEC 60950-1 and CAN/CSA-C22.2 No 60950-1 2nd edition and the parts are compliant with EN55022/CISPR22 EMC standards with minimal input filtering.

For more information, visit Murata's website at