Tempe, Ariz. — Artesyn Embedded Technologies launched the high efficiency ADQ500 series of 500-watt quarter-brick isolated DC-DC converters for telecom network and data center equipment. The DC-DC converters offer ultra-high efficiency of typically 95.5 percent at full load and operates over an ambient temperature range of minus 40 to 85 degrees Celsius, which makes them suited for the isolated converter in a distributed power architecture supplying power to non-isolated converters.
The ADQ500 converters are Artesyn’s first to feature both digital and analog interface versions, with industry standard DOSA footprints. Artesyn said the digital interface version allows communication to the converter via the PMBus command protocol with control and monitoring functions for voltage, current, temperature and the setting and reporting of fault conditions. Standard analog control features include output voltage trim, output voltage sense compensation, and remote enable functions.
The ADQ500 series supplies an input voltage range of 36 to 75 V and is primarily designed for use with regulated 48-V supplies in computing and server applications, as well as standard -48 V supplies found in telecom equipment. Capable of delivering up to 50-A output current with a single fully regulated 12-V output, the converters have no minimum load requirement.
The open-frame design of the power supplies is optimized for forced air or conduction cooling, and an aluminum baseplate option is available for enhanced thermal performance, said Artesyn. The low-profile open-frame models have an installed height of 0.43 inch (11 mm), while the baseplate versions require 0.52 inch (13.3 mm).
The converters are protected against output overvoltage, output overcurrent and over-temperature conditions. They have an enhanced pre-bias start-up capability and for high-current applications two converters can be connected in parallel, automatically using the droop method of current sharing, Artesyn said. The conversion technology uses 175-kHz fixed frequency switching to help minimize external EMI filtering requirements.