UEI15 Series
www.murata-ps.com
Isolated Wide Input Range 15-Watt DC/DC Converters
Typical unit
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.
FEATURES
PRODUCT OVERVIEW
ꢀ
Wide range 4:1 inputs on the 0.96" x 1.1" x 0.32"
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 0.2ꢀ or less and may be trimmed
within 10ꢀ 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.
ꢀSmall footprint DC/DC converter, ideal for
high current applications
ꢀ
ꢀIndustry standard 0.96" x 1.1" X 0.32" open
frame package and pinout
ꢀ
ꢀWide range input voltages 9-36 and 18-75 Vdc
ꢀ
ꢀ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 operation with no required external
The high efficiency offers minimal heat buildup
and “no fan” operation.
components
ꢀ
ꢀUsable -40 to 85°C temperature range (with
derating)
ꢀ
ꢀCertified to UL 60950-1, CAN/CSA-C22.2 No.
60950-1, IEC60950-1, EN60950-1 safety ap-
provals, 2nd edition
ꢀ
ꢀExtensive self-protection shut down features
+VOUT
+VIN
–VOUT
On/Off
Control
Control
GATE DRIVE
ISOLATION BARRIER
ISOLATION
Reference, Trim &
Error Amplifier
−VIN
TRIM
Figure 1. Simplified block diagram—3.3V and 5VOUT models only.
Typical topology is shown.
For full details go to
www.murata-ps.com/rohs
REG.-Nr. D806
www.murata-ps.com/support
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