www.murata-ps.com
UEI15 Series
Isolated Wide Input Range 15-Watt DC/DC Converters
Featuring a full 15 Watt or greater output in one square inch of board area, the UEI
series isolated DC/DC converter family offers efficient regulated DC power for printed
circuit board mounting.
Typical unit
FEATURES
Small footprint DC/DC converter, ideal for
high current applications
Industry standard 0.96" x 1.1" X 0.36"
open frame package and pinout
Wide range input voltages 9-36 and
18-75 Vdc
Double lead-free assembly and attachment
for RoHS standards
Isolation up to 2250 VDC (basic)
Up to 15 Watts or greater total output
power with overtemperature shutdown
High efficiency synchronous rectifier
forward topology
Stable no-load operation with no required
external components
Usable -40 to 85°C temperature range
(with derating)
Designed to meet UL 60950-1, CAN/CSA-
C22.2 No. 60950-1, IEC60950-1,
EN60950-1 safety approvals
Extensive self-protection shut down
features
PRODUCT OVERVIEW
Wide range 4:1 inputs on the 0.96" x 1.1" x 0.36"
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. The industry-
standard pinout fits larger 1" x 2" converters. Fixed
output voltages from 3.3 VDC to 15 VDC are regu-
lated to within ±0.2% or less and may be trimmed
within ±10% of nominal output. Applications
include small instruments, area-limited microcon-
trollers, computer-based systems, data communi-
cations equipment, remote sensor systems, vehicle
and portable electronics.
The UEI 15W series includes full magnetic and
optical isolation up to 2250 Volts DC (basic insula-
tion). For connection to digital systems, the outputs
offer fast settling to current step loads and toler-
ance of higher capacitive loads. Excellent ripple
and noise specifications assure compatibility to
circuits using CPU’s, ASIC’s, programmable logic
and FPGA’s. For systems requiring controlled
startup/shutdown, an external switch, transis-
tor or digital logic may be used to activate the
remote On/Off control.
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 high efficiency offers minimal heat buildup
and “no fan” operation.
SIMPLIFIED SCHEMATIC
+V
OUT
+V
IN
–V
OUT
On/Off
Control
Control
GATE DRIVE
ISOLATION BARRIER
−V
IN
ISOLATION
Reference, Trim &
Error Amplifier
TRIM
3.3V and 5V
OUT
models only.
For full details go to
www.murata-ps.com/rohs
Typical topology is shown.
www.murata-ps.com
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MDC_UEI15W.B24
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