BEI15 Series
www.murata-ps.com
Isolated Wide Input Bipolar 15-Watt DC/DC Converters
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"
ꢀꢀ50 Volts DC (Q48 models) and ꢀ000 VDC (Q1ꢀ
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-
Typical unit
(ꢀ4.4 x ꢀ7.9 x 8.9 mm) converter are either 9 to 36 ceptible circuits. For systems requiring controlled
Volts DC (Q1ꢀ models) or 18 to 75 Volts DC (Q48
models), ideal for battery-powered and telecom
equipment. The industry-standard pinout fits larger
1" x ꢀ" converters. Fixed output voltages of 5,
1ꢀ or 15 VDC are regulated to within 0.ꢀ5ꢁ.
Applications include small instruments, area-
limited microcontrollers, data communications
equipment, remote sensor systems, vehicle and
portable electronics.
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.
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
The BEI-15 series includes full magnetic
and optical isolation with Basic protection up to
ꢀBipolar 5V, 1ꢀV and 15V outputs
ꢀUp to 15 Watts or greater total output
power with overtemperature shutdown
ꢀIsolation up to ꢀꢀ50 VDC (basic), Q48 models
Contents
Page
ꢀHigh efficiency synchronous rectifier
Description, Photograph, Connection Diagram
Ordering Guide, Model Numbering, Soldering Guidelines
Mechanical Specs, Input/Output Pinout
Detailed Electrical Specifications
Application Notes
1
ꢀ
3
4
6
8
forward topology
ꢀUsable -40 to 85°C temperature range
(with derating)
ꢀAssembly and attachment for RoHS standards
Performance Data
ꢀExtensive self-protection shut down
features
ꢀMeets UL 60950-1, CAN/CSA-
Cꢀꢀ.ꢀ No. 60950-1, IEC60950-1,
EN60950-1 safety approvals (ꢀnd Edition)
CONNECTION DIAGRAM
*TPMBUJPO
F1
+Vin (1)
Barrier
+Vout (6)
Common (5)
-Vout (4)
tꢀ4XJUDIJOH
tꢀ'JMUFST
External
DC
Power
Source
Controller
and
Power
On/Off
Control
(3)
tꢀ4XJUDIJOH
tꢀ'JMUFST
5SBOTGFS
Open = On
$MPTFEꢀꢁꢀ0GG
ꢂ1PTJUJWFꢀ
polarity)
Reference and
Error Amplifier
-Vin (ꢀ)
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
email: sales@murata-ps.com
18 Feb 2011 MDC_BEI15W.A04 Page 1 of 13