www.murata-ps.com
UEI30 Series
30W Isolated Wide-Range DC/DC Converters
Featuring a full 30 Watt output in 1.8 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 0.92" x 1.92" x 0.35"
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 tightly
regulated and may be trimmed within ±10%
of nominal output. Applications include small
instruments, computer-based systems, data com-
munications equipment, remote sensor systems,
vehicle and portable electronics.
The UEI 30W 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 and overtem-
perature 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
0.92" x 1.92" x 0.35" open frame package
Wide range input voltages 9-36 and 18-75Vdc
Assembly and attachment for RoHS-6 hazard-
ous substance compliance
Isolation up to 2250 VDC (basic)
Up to 30W total output power with
overtemperature shutdown
High efficiency synchronous rectifier forward
topology
Stable no-load operation with no required
external components
–40 to +85°C temperature range; see derating
Certified to UL60950-1, CSA-C22.2 No. 234,
EN60950-1 safety approvals
Extensive self-protection shut down features
RoHS-6 hazardous substance compliant
Contents of full data sheet
Description, Photograph, Connection Diagram
Ordering Guide, Model Numbering, Soldering Guidelines
Mechanical Specs, Input/Output Pinout
Detailed Electrical Specifications
Application Notes
Performance Data
Page
1
2
3
4
6
11
SIMPLIFIED SCHEMATIC
+V
OUT
+V
IN
GATE
DRIVE
–V
IN
–V
OUT
ISOLATION
BARRIER
On/Off
Control
Control
For full details go to
www.murata-ps.com/rohs
Typical topology is shown.
OPTO
ISOLATION
Reference, trim &
Error Amplifier
TRIM
www.murata-ps.com
10/20/09
email: sales@murata-ps.com
MDC_UEI Series 30W.A12_short
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MURATA-PS [ MURATA POWER SOLUTIONS INC. ]
