www.murata-ps.com
UEI Series
50-60W Isolated Wide-Range DC/DC Converters
Featuring a full 50-60 Watt output in 2.9 square inches of board area,
the UEI series isolated DC/DC converter family offers efficient
regulated DC power for printed circuit board mounting.
PRODUCT OVERVIEW
Wide range 4:1 inputs on the 1.50" x 1.90" x
0.38" converter are either 9 to 36 Volts DC (Q12
models) or 18 to 75 Volts DC (Q48 models), ideal
for battery-powered and telecom equipment.
Fixed output voltages from 3.3 VDC to 15 VDC are
regulated to within ±0.05% and may be trimmed
within ±10% of nominal output. Applications
include small instruments, computer-based
systems, data communications equipment, remote
sensor systems, vehicle and portable electronics.
The UEI 50-60W Series includes full magnetic
and optical isolation up to 2250 Volts DC (basic
insulation). For connection to digital systems, the
outputs offer fast settling to current step loads
and tolerance of higher capacitive loads. Excellent
ripple and noise specifications assure compatibil-
ity to circuits using CPU’s, ASIC’s, programmable
logic and FPGA’s. No minimum load is required.
For systems requiring controlled startup/shut-
down, an external switch, transistor or digital logic
may be used to activate the remote On/Off control.
Remote Sense inputs compensate for resistive line
drops at high currents.
A wealth of self-protection features avoid both
converter and external circuit problems. These
include input undervoltage lockout, input overvolt-
age 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.
The synchronous rectifier forward topology
offers high efficiency for minimal heat buildup
and “no fan” operation. The open frame design is
also available under special quantity order with
an encapsulation shell and thermally-conductive
potting compound. This option offers additional
cooling in low-airflow, high temperature applica-
tions.
Typical unit
FEATURES
Small footprint DC/DC converter, ideal for high
current applications
Industry standard 1.50˝ x 1.90˝ x 0.38˝ open
frame package and pinout
Wide range input voltages 9-36 and 18-75Vdc
Assembly and attachment for RoHS standards
Isolation up to 2250 VDC (basic)
Up to 50-60W total output power with
overtemperature shutdown
High efficiency synchronous rectifier forward
topology
Stable no-lead operation with no required
external components
–40 to +85°C temperature range with derating
Designed to meet UL60950-1, CSA-C22.2 No.
234, EN60950-1 safety approvals
Extensive self-protection shut down features
RoHS6 compliant
SIMPLIFIED SCHEMATIC
+V
OUT
+V
IN
GATE
DRIVE
–V
IN
–V
OUT
ISOLATION
BARRIER
+SENSE
On/Off
Control
Control
OPTO
ISOLATION
Reference, trim &
Error Amplifier
TRIM
–SENSE
Typical topology is shown.
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MDC_UEI Series 50-60W.B24
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