www.murata-ps.com
PRODUCT OVERVIEW
Featuring a full 15 Watt output in one square
inch of board area, the BEI-15 series isolated DC/
DC converter family offers efficient regulated DC
power for printed circuit board mounting. The
wide range 4:1 inputs on the 0.96" x 1.1" x 0.35"
(24.4 x 27.9 x 8.9 mm) 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 of ±5,
±12 or ±15 VDC are regulated to within ±0.25%.
Applications include small instruments, area-
limited microcontrollers, data communications
equipment, remote sensor systems, vehicle and
portable electronics.
The BEI-15 series includes full magnetic
and optical isolation with Basic protection up to
BEI15 Series
Isolated Wide Input Bipolar 15-Watt DC/DC Converters
Typical unit
FEATURES
Small footprint DC/DC converter, ideal for
high current applications
Industry standard 0.96" x 1.1" X 0.35"
open frame package and pinout
Wide range input voltages 9-36 and
18-75 Vdc
Bipolar ±5V, ±12V and ±15V outputs
Up to 15 Watts or greater total output
power with overtemperature shutdown
Isolation up to 2250 VDC (basic), Q48 models
High efficiency synchronous rectifier
forward topology
Usable -40 to 85°C temperature range
(with derating)
Assembly and attachment for RoHS standards
Extensive self-protection shut down
features
Meets UL 60950-1, CAN/CSA-
C22.2 No. 60950-1, IEC60950-1,
EN60950-1 safety approvals
2250 Volts DC (Q48 models) and 2000 VDC (Q12
models). For powering digital systems, the outputs
offer fast settling to step transients and will accept
higher capacitive loads. Excellent ripple and noise
specifications assure compatibility to noise-sus-
ceptible circuits. For systems requiring controlled
startup/shutdown, an external remote On/Off
control may use a switch, transistor or digital logic.
A wealth of self-protection features avoid both
converter and external circuit faults. These include
input undervoltage lockout and overtemperature
shutdown. The outputs current limit using the
“hiccup” autorestart technique and the outputs
are short-circuit protected. Additional features
include output overvoltage and reverse conduction
elimination. The high efficiency offers minimal heat
buildup and “no fan” operation.
Contents
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
8
CONNECTION DIAGRAM
F1
+Vin (1)
Barrier
External
DC
Power
Source
+Vout (6)
On/Off
Control
(3)
Controller
and
Power
Common (5)
-Vout (4)
Open = On
Reference and
Error Amplifier
polarity)
-Vin (2)
Typical topology is shown.
For full details go to
www.murata-ps.com/rohs
Murata Power Solutions recommends a fuse at F1.
www.murata-ps.com
04 Mar 2010
email: sales@murata-ps.com
MDC_BEI15W.A01
Page 1 of 13
MURATA [ MURATA MANUFACTURING CO., LTD. ]
