UEI15 Series

Isolated Wide Input Range 15-Watt DC/DC Converters

For full details go to

www.murata-ps.com/rohs

www.murata-ps.com

MDC_UEI15W.B21 Page 1 of 13

SIMPLIFIED SCHEMATIC

PRODUCT OVERVIEW

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.

GATE DRIVE

Control

Reference, Trim &

Error Amplifier

On/Off

Control

TRIM

ISOLATION BARRIER

ISOLATION

Typical topology is shown.

Typical unit

FEATURES

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Small footprint DC/DC converter, ideal for

high current applications

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Industry standard 0.9" x 1.1" X 0.335"

open frame package and pinout

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Wide range input voltages 9-36 and

18-75 Vdc

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Double lead-free assembly and attachment

for RoHS standards

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Isolation up to 2250 VDC (basic)

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Up to 15 Watts or greater total output

power with overtemperature shutdown

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High efficiency synchronous rectifier

forward topology

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Stable no-load operation with no required

external components

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Usable -40 to 85°C temperature range

(with derating)

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Designed to meet UL 60950-1, CAN/CSA-

C22.2 No. 60950-1, IEC60950-1,

EN60950-1 safety approvals

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Extensive self-protection shut down

features

Wide range 4:1 inputs on the 0.9" x 1.1" x 0.335"

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.