Product category:
Power Supplies and Uninterruptible Power Supplies
News Release from: Emerson Network Power - Embedded Power | Subject: EXQ60 DC/DC converters
Edited by the Engineeringtalk Editorial
Team on 21 June 2001
DC/DC converters pack 60W into
quarter-brick
Artesyn's new EXQ60 series of dual-output DC/DC converters feature a wide input voltage range of 33V to 75VDC, and are available with 5V/3.3V or 3.3V/2.5V outputs
Artesyn Technologies is continuing its aggressive push in the high current, low voltage power conversion market with the launch of a new series of dual-output DC/DC converters that provide up to 60W from an industry-standard quarter-brick package The new EXQ60 series of converters feature a wide input voltage range of 33V to 75VDC, and are available with 5V/3.3V or 3.3V/2.5V outputs
Both models employ a novel form of open frame construction, measure just 2.3 x 1.5 x 0.5 inches, and offer exceptionally high output current capabilities - the 5V/3.3V model can deliver up to 12A/15A respectively.
Intended primarily for networking, telecoms and wireless applications, the converters are particularly suitable for systems employing a distributed power architecture.
EXQ60 series DC/DC converters use synchronous rectification techniques to achieve extremely high conversion efficiencies; the 5V/3.3V model, for example, has a typical efficiency of 91% and can deliver up to 60W of output power.
The converters' open frame construction means that there are no thermally conductive potting compounds between power dissipating components and heat-sensitive control circuits, and a novel two-board stacked structure is employed to further thermally de-couple these two areas.
The baseplate board containing the synchronous rectifiers is a two-layer thermally conductive substrate laminated to an aluminium plate.
The overall result is a high reliability design that has a wide operational temperature range, spanning from -40sC ambient up to +100sC baseplate temperature.
Designed for fully-automated assembly, EXQ60 series converters are constructed entirely from SMT components, and have a standard quarter-brick footprint.
In fact, the converters are pin-for-pin compatible with a number of leading competitive products - which makes them ideal for manufacturers seeking a second source option - but are capable of delivering more usable power under low airflow or natural convection conditions than any comparable DC/DC converter on the market today.
All EXQ60 series converters offer an output voltage trim facility that enables the output to be adjusted between 90% and 110% of nominal.
This is a particularly useful feature for systems designers who wish to perform margin testing by varying supply voltages, and it also allows standard off-the-shelf DC/DC converters to be used in applications involving highly specific voltage requirements, which would previously have demanded expensive customised power sources.
Both converters in the series also offer remote on/off facility.
The converters have no minimum load requirement, and are comprehensively protected against over-voltage, over-temperature and short-circuit conditions.
A combination of non-latching clamping over-voltage protection and a brick wall current limit characteristic are employed to help maximise system uptime, by ensuring that the converter will continue to deliver power even when in failure mode.
Artesyn's EXQ60 series DC/DC converters have a 1500VDC isolation rating and carry a full set of international safety approvals, including EN60950 (TUV Rheinland) and UL/cUL1950.
The converters are designed to meet all relevant standards for use in telecommunications equipment, including ETS 300-019 for environmental protection, ETS 300-132-2 for maximum inrush current and supply voltage rise time, and ETS 300-386-1 for EMC issues.
With the addition of a small number of external filtering components, EXQ60 series converters can meet the EN55022 level A and level B standards for conducted noise emissions.
EXQ60 series DC/DC converters are available to OEMs for $66.23, when ordered in quantities of 10,000.
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