www.murata-ps.com
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 communications equipment, remote sensor
systems, vehicle and portable electronics.
The UEI 30W Series includes full magnetic and
optical isolation up to 2250 Volts DC (basic insu-
lation). For connection to digital systems, the out-
puts 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
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 tempera-
ture applications.
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
Double lead-free assembly and attachment
for RoHS standards
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 with derating
Designed to meet UL60950-1, CSA-C22.2 No.
234, EN60950-1 safety approvals
Extensive self-protection shut down features
RoHS hazardous substance compliant
SIMPLIFIED SCHEMATIC
+V
OUT
+V
IN
GATE
DRIVE
–V
IN
–V
OUT
ISOLATION
BARRIER
On/Off
Control
Control
OPTO
ISOLATION
Reference, trim &
Error Amplifier
TRIM
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 30W.A01
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