12V, 20A DOSA compatible quarter brick DCDC converter

March 07, 2014 // By Graham Prophet
Murata Power Solutions’ UWQ 240W quarter-brick DC/DC converter is designed for a wireless backhaul, smart grid, and a broad range of networking and other telecommunications applications.

With a fixed 12 VDC / 20A single output this DOSA-compatible open-frame quarter brick package occupies 58.4 x 36.8 x 11.7 mm. The converter accepts a 3:1 input range of voltage from 18 to 60 VDC around a nominal 48 VDC. A remote sense feature provides the automatic adjustment of Vout to make up for line and load losses while a trim function allows ±10% of Vout. The series has tight load and line regulation that ensures that the output voltage does not vary beyond ± 1.25% when the load changes.

The UWQ-12/20-T48 has a typical efficiency of 92% and up to 3 units can operate in parallel in order to provide redundancy or load sharing of a higher power requirement. Controls include remote On/Off control of either negative or positive logic. In addition, the converter has a number of protection features including overcurrent, overtemperature, input undervoltage and output short circuit.

The UWQ converter is designed to operate in environments ranging from -40 to +85C. Input to output isolation is 2,250 VDC with a Basic insulation system to meet industry safety requirements. An optional baseplate is offered to suit conduction cooled applications.

Murata Europe; www.murata.eu