24V INPUT DC/DC
CONVERTERS
NEW 24V INPUT EIGTH-BRICK AND QUARTER-BRICK DC/DC CONVERTERS FROM ARTESYN OPEN NEW
DIMENSIONS IN POWER THANKS TO EFFICIENCIES OF UP TO 91%, A HEIGHT OF ONLY 7.6mm, AND A
POWER DENSITY OF OVER 6W/cm³ FOR EIGHTH-BRICK VERSIONS.
The new product series comprises two 20A eighth bricks and two 30A quarter bricks,
offering single isolated outputs of 1.8V and 3.3V. All four converters provide more
useable power than any equivalent competitive unit on the market - the 1.8V@30A quarter
brick, for example, is over 7% more efficient than its nearest rival, dissipating 46% less
power. This translates directly into more power being made available to the load, easier
thermal management and higher reliability
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ARTESYN's 24V input brick converters
are the latest members of the Typhoon family. They are primarily intended for 27V wireless
base stations, space-critical telecom applications and general 24V industrial electronics
systems.
They are also ideal for use in legacy 24V microwave and optical fiber equipment. The
converters' nominal 24V input accommodates any voltage in the range 18 to 36V, making them
suitable for distributed power architecture (DPA) systems with either 24V or 28V DC power
distribution buses.
These 24V input Typhoon eighth- and quarter-bricks employ a full wave coupled-inductor
topology in conjunction with a patented processor-controlled synchronous rectifier circuit
to maximize conversion efficiency. Both the eighth- and quarter-brick 1.8V output models
provide exceptionally high full load efficiencies of 91%, and the 3.3V models are in the
same league at 90%. Unlike competitive products which frequently exhibit hotspots around
the power stage components, all of ARTESYN's Typhoon products are designed to have an
evenly distributed thermal profile across their surface. This has the key advantage that
the converters have virtually the same thermal derating characteristics regardless of
their mounting orientation, thereby further increasing their design flexibility. The 24V
input eighth- and quarter-brick converters are designed for operation over an ambient
temperature range of -40 to +85°C without a heatsink and are suitable for both convection
cooled and forced air environments.
The new DC/DC converter modules carry a full set of international safety approvals,
including UL/cUL60950 and EN60950-1 VDE. They also feature basic isolation, with
functional (operational) isolation tested to 2250VDC, thereby facilitating ease of use in
IEEE802.3af (Power-over-Ethernet) applications.
Michael Schrutka, EXT 31
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