ULS 60-Watt Series
www.murata-ps.com
Sixteenth-brick DOSA-Compatible,
Isolated DC/DC Converters
FEATURES
nꢀSmall footprint DC/DC converter, ideal for
high current applications
Typical unit
nꢀTiny 0.9" x 1.3" x 0.40" open frame package
nꢀIndustry standard DOSA "brick" format
and pinout with surface mount option
PRODUCT OVERVIEW
The world of “brick” DC/DC converters has seen
a steady size reduction. The ULS series makes
minimum load is required. For systems requiring
controlled startup/shutdown, an external remote
another dramatic size shrink down to a “sixteenth- On/Off control may use a switch, transistor or digital
nꢀ36-75 Volts DC input range
nꢀ2250 Volt Basic input/output isolation
(48V models)
brick” width (0.9 inches) while still retaining up
to 66 Watt output and full 2250 Volt DC isolation.
The PC-board mount converter family accepts
logic. Remote Sense inputs compensate for resis-
tive line drops at high currents.
Many self-protection features on the ULS series
nꢀUp to 66 Watts total output power with
overtemperature shutdown
36 to 75 Volts DC inputs and delivers fixed outputs avoid both converter and external circuit hazards.
nꢀHigh efficiency synchronous rectifier forward
topology
regulated to within 0.2ꢀ. The ULS converters
are ideal for datacom and telecom applications,
cell phone towers, data centers, server farms and
network repeaters.
ULS outputs may be trimmed within 10ꢀ of
nominal output while delivering fast settling to
current step loads and no adverse effects from
higher capacitive loads. Excellent ripple and noise
specifications assure compatibility to circuits using
CPU’s, ASIC’s, programmable logic and FPGA’s. No
These include input undervoltage lockout and
overtemperature shutdown. The outputs current
limit using the “hiccup” autorestart technique and
the outputs may be short-circuited indefinitely.
Additional features include output overvoltage and
reverse conduction elimination.
nꢀStable no-load operation with no required
external components
nꢀOperating temperature range -40 to +85°C
with derating
The synchronous rectifier forward topology yields
high efficiency for minimal heat buildup and “no
fan” operation.
nꢀCertified to UL 60950-1, CSA-C22.2 No. 234,
EN60950-1 safety approvals, 2nd Edition
nꢀExtensive self-protection shut down features
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Typical topology is shown
Figure 1. Simplified Block Diagram
For full details go to
www.murata-ps.com/rohs
REG.-Nr. D216
www.murata-ps.com/support
MDC_ULS Series.C04 Page 1 of 24
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