BEI15 Series
Isolated Wide Input Bipolar 15-Watt DC/DC Converters
MDC_BEI15W.A18 Page 1 of 15
www.murata-ps.com
www.murata-ps.com/support
For full details go to
www.murata-ps.com/rohs
 
CONNECTION DIAGRAM
Typical topology is shown.
Murata Power Solutions recommends a fuse at F1.
Typical unit
FEATURES
Small footprint DC/DC converter, ideal for
high current applications
Industry standard 0.96" x 1.1" X 0.33"
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 effi ciency synchronous rectifi er
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 (2nd Edition)
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 effi cient regulated DC
power for printed circuit board mounting. The
wide range 4:1 inputs on the 0.96" x 1.1" x 0.33"
(24.4 x 27.9 x 8.4 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 fi ts 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
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
specifi cations 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 effi ciency offers minimal heat
buildup and “no fan” operation.
F1
External
DC
Power
Source
Reference and
Error Amplifier
t4XJUDIJOH
t'JMUFST
t4XJUDIJOH
t'JMUFST
-Vout (4)
Common (5)
+Vout (6)
On/Off
Control
(3)
-Vin (2)
Open = On
$MPTFE0GG
+Vin (1)
1PTJUJWF
MPHJD
Controller
and
Power
5SBOTGFS
*TPMBUJPO
Barrier
REG.-Nr. D806
BEI15 Series
Isolated Wide Input Bipolar 15-Watt DC/DC Converters
MDC_BEI15W.A18 Page 2 of 15
www.murata-ps.com/support
PART NUMBER STRUCTURE
Some model number combinations may not
be available. See website or contact your local
Murata sales representative.
*Minimum order quantity is required.
Samples available with standard pin
length only.
Please refer to the part number structure for additional options and complete
ordering part numbers.
The minimum output load for the BEI-15W series is 10% of maximum current to
meet published specifications. The converter will not be damaged by less than
10% load but some specs may degrade slightly.
All specifications are at nominal line voltage and full load, +25 °C. unless other-
wise noted. See detailed specifications and notes for full conditions.
Output capacitors are 1 μF ceramic in parallel with 10 μF electrolytic. The input cap
is 100 μF, low ESR.
I/O caps are necessary for our test equipment and may not be needed for your
application.
RoHS-6 compliance does not claim EU RoHS exemption 7b (lead in solder).
Balanced loads, 10% to 100% loads.
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE
Root Models
Output Input
Effi ciency
Open Frame
Package – C69
VOUT
(V)
IOUT
(mA,
max.)
Total
Power
(W)
R/N (mVp-p) Regulation (Max.)
VIN
Nom.
(V)
Range
(V)
IIN =
no
load
(mA)
IIN =
full
load
(mA)Typ. Max. Line Load Min. Typ. (inches) (mm)
Case
Pinout
BEI15-050-Q12 ±5 ±1500 15 60 100 ±0.25% ±0.25% 24 9-36 90 740 82.8% 84%
0.96x1.1x0.33 24.4x27.9x8.4 P74
BEI15-050-Q48 ±5 ±1500 15 60 100 ±0.25% ±0.25% 48 18-75 50 374 82% 83.5%
BEI15-120-Q12 ±12 ±625 15 80 120 ±0.25% ±0.25% 24 9-36 95 730 82% 86%
BEI15-120-Q48 ±12 ±625 15 80 120 ±0.25% ±0.25% 48 18-75 50 370 84% 85.5%
BEI15-150-Q12 ±15 ±500 15 100 150 ±0.25% ±0.25% 24 9-36 100 740 83% 84%
BEI15-150-Q48 ±15 ±500 15 100 150 ±0.25% ±0.25% 48 18-75 50 360 84.5% 86%
Nominal Output Voltage
in Tenths of a Volt
Bipolar Wide Input
15-Watt Series
BEI15 - Q12-050 -
C
RoHS-6 Hazardous
Substance Compliance (note 4)
Input Voltage Range
Q12 = 9-36V
Q48 = 18-75V
P
On/Off Control Logic
P = Positive
N = Negative
X = Control pin omitted
H
Conformal Coating Option
Blank = No coating, standard
H = Coating added, optional
(built to order; contact Murata Power Solutions for MOQ and lead times.)
*
Special Customer Confi guration Part Number:
BEI15-150-Q48N-C-CIS
Lx
Pin Length Option
Blank = Std. pin length 0.25˝ (6.3mm)
L1 = 0.110˝ (2.79mm)
*
L2 = 0.145˝ (3.68mm)
*
BEI15 Series
Isolated Wide Input Bipolar 15-Watt DC/DC Converters
MDC_BEI15W.A18 Page 3 of 15
www.murata-ps.com/support
INPUT CHARACTERISTICS BEI15-050-Q12 BEI15-050-Q48 BEI15-120-Q12 BEI15-120-Q48 BEI15-150-Q12 BEI15-150-Q48
Input voltage range See ordering guide
Start-up threshold, Volts typ. 9.0 17.0 9.5 17.0 8.9 17.0
Undervoltage shutdown, Volts 8.5 16.0 8.4 16.2 8.4 16.0
Overvoltage shutdown, Volts none
Refl ected (back) ripple current mA pk-pk 5303030530
Input current
Full load conditions See ordering guide
Inrush transient, A2sec 0.05 0.05 0.05 0.05 0.05 0.05
Output short circuit, mA 50 50 50 50 50 50
Output at min. load, mA 90 50 95 50 30 50
Low line (Vin=min.), Amps 2.03 1.0 2.01 0.97 1.97 0.96
Standby mode, mA (Off, UV, OT shutdown) 2511111
Recommended fuse, Amps 424242
Internal input fi lter type Capacitive
Reverse polarity protection None, install external fuse
Remote On/Off Control
Positive logic ("P" model suffi x)
OFF=Gnd pin or
-0.7 to +0.8V max.
ON=open pin or
+10 to +15V max.
Negative logic ("N" model suffi x)
OFF=open pin or
+10 to +15V max.
ON=Gnd pin or
-0.7 to +0.8V max.
On/Off Current, mA max. 1
OUTPUT CHARACTERISTICS BEI15-050-Q12 BEI15-050-Q48 BEI15-120-Q12 BEI15-120-Q48 BEI15-150-Q12 BEI15-150-Q48
Voltage output range See ordering guide
Voltage output accuracy, % of Vnom. (50% load) ±1
Temperature coeffi cient, % of Vout range/°C ±0.02
Minimum loading, percent of full power 10
Ripple/noise (20 MHz bandwidth)
See ordering guideLine/Load regulation
Effi ciency
Capacitive loading, μF max.,
low ESR <0.02Ω max., resistive load
500 500 150 150 100 100
Overvoltage protection, Volts
(hiccup auto restart after fault removal)
6.5 7 15.8 16 18 20
OV protection method Magnetic feedback
Isolation voltage
Input to Output, Volts DC min. 2000 2250 2000 2250 2000 2250
Isolation resistance, MΩ min. 10 10 10 10 10 10
Isolation capacitance, pF 1000 1000 600 700 1000 1000
Isolation safety rating Basic insulation
Miscellaneous
Current limit inception, Amps (Vout
actual ≤ 98% of Vnom.) after warmup
2.6 2.5 1 1.1 0.9 0.9
Short circuit protection method Current limiting, hiccup autorestart
Short circuit current, Amps max. 0.3
Short circuit duration (output shorted to ground)
Continuous
FUNCTIONAL SPECIFICATIONS

BEI15-120-Q48P-C

Mfr. #:
Manufacturer:
Murata Power Solutions
Description:
Isolated DC/DC Converters 15W 48Vin Pos Logic +/-12Vout +/-625mA
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
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