www.murata-ps.com
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
range input voltages 9-36 and
Wide
18-75 Vdc
Bipolar ±5V, ±12V and ±15V outputs
to 15 Watts or greater total output
Up
power with overtemperature shutdown
Isolation up to 2250 VDC (basic), Q48 models
efficiency synchronous rectifier
High
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)
CONNECTION DIAGRAM
F1
+Vin (1)
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
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.
Barrier
External
DC
Power
Source
+Vout (6)
On/Off
Control
(3)
Controller
and
Power
Common (5)
-Vout (4)
Open = On
Reference and
Error Amplifier
-Vin (2)
Typical topology is shown.
For full details go to
www.murata-ps.com/rohs
Murata Power Solutions recommends a fuse at F1.
REG.-Nr. D806
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MDC_BEI15W.A16
Page 1 of 15
BEI15 Series
Isolated Wide Input Bipolar 15-Watt DC/DC Converters
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE
➀
Output
R/N (mVp-p)
Root Models
➀
BEI15-050-Q12
BEI15-050-Q48
BEI15-120-Q12
BEI15-120-Q48
BEI15-150-Q12
BEI15-150-Q48
V
OUT
(V)
±5
±5
±12
±12
±15
±15
I
OUT
Total
(mA, Power
max.)➁ (W)
Typ.
±1500
±1500
±625
±625
±500
±500
15
15
15
15
15
15
60
60
80
80
100
100
Regulation (Max.)
Input
I
IN
=
V
IN
no
Nom. Range load
(V)
(V) (mA)
24
48
24
48
24
48
9-36
18-75
9-36
18-75
9-36
18-75
90
50
95
50
100
50
I
IN
=
full
load
(mA)
740
374
730
370
740
360
Efficiency
Open Frame
Package – C69
Case
Pinout
Max.
100
100
120
120
150
150
Line
Load➄
Min.
82.8%
82%
82%
84%
83%
84.5%
Typ.
84%
83.5%
86%
85.5%
84%
86%
(inches)
(mm)
±0.25% ±0.25%
±0.25% ±0.25%
±0.25% ±0.25%
±0.25% ±0.25%
±0.25% ±0.25%
±0.25% ±0.25%
0.96x1.1x0.35
24.4x27.9x8.9
P74
➀
Please refer to the part number structure for additional options and complete
ordering part numbers.
➁
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.
➂
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.
➃
RoHS-6 compliance does not claim EU RoHS exemption 7b (lead in solder).
➄
Balanced loads, 10% to 100% loads.
PART NUMBER STRUCTURE
BEI15
-
050
-
Q12 P H Lx
-
C
Bipolar Wide Input
15-Watt Series
Nominal Output Voltage
in Tenths of a Volt
Input Voltage Range
Q12
= 9-36V
Q48
= 18-75V
RoHS-6 Hazardous
Substance Compliance (note 4)
Pin Length Option
Blank
= Std. pin length 0.25˝ (6.3mm)
L1
= 0.110˝ (2.79mm)
L2
= 0.145˝ (3.68mm)
*Minimum
*
*
Conformal Coating Option
Blank
= No coating, standard
H
= Coating added, optional
(built to order; contact Murata Power Solutions for MOQ and lead times.)
On/Off Control Logic
P
= Positive
N
= Negative
X
= Control pin omitted
‡
order quantity is required.
Samples available with standard pin
length only.
*
‡
Some model number combinations may not
be available. See website or contact your local
Murata sales representative.
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MDC_BEI15W.A16
Page 2 of 15
BEI15 Series
Isolated Wide Input Bipolar 15-Watt DC/DC Converters
FUNCTIONAL SPECIFICATIONS
INPUT CHARACTERISTICS
Input voltage range
Start-up threshold, Volts typ.
Undervoltage shutdown, Volts
Overvoltage shutdown, Volts
Reflected (back) ripple current mA pk-pk
Input current
Full load conditions
Inrush transient, A2sec
Output short circuit, mA
Output at min. load, mA
Low line (Vin=min.), Amps
Standby mode, mA (Off, UV, OT shutdown)
Recommended fuse, Amps
Internal input filter type
Reverse polarity protection
Remote On/Off Control
Positive logic ("P" model suffix)
BEI15-050-Q12
9.0
8.5
5
BEI15-050-Q48
17.0
16.0
30
BEI15-120-Q12
BEI15-120-Q48
See ordering guide
9.5
8.4
none
30
30
5
30
17.0
16.2
BEI15-150-Q12
8.9
8.4
BEI15-150-Q48
17.0
16.0
0.05
50
90
2.03
25
4
0.05
50
50
1.0
1
2
See ordering guide
0.05
0.05
50
50
95
50
2.01
0.97
1
1
4
2
Capacitive
None, install external fuse
OFF=Gnd pin or
-0.7 to +0.8V max.
ON=open pin or
+10 to +15V max.
OFF=open pin or
+10 to +15V max.
ON=Gnd pin or
-0.7 to +0.8V max.
1
0.05
50
30
1.97
1
4
0.05
50
50
0.96
1
2
Negative logic ("N" model suffix)
On/Off Current, mA max.
OUTPUT CHARACTERISTICS
Voltage output range
Voltage output accuracy, % of Vnom. (50% load)
Temperature coefficient, % of Vout range/°C
Minimum loading, percent of full power
Ripple/noise (20 MHz bandwidth)
Line/Load regulation
Efficiency
Capacitive loading, μF max.,
low ESR <0.02Ω max., resistive load
Overvoltage protection, Volts
(hiccup auto restart after fault removal)
OV protection method
Isolation voltage
Input to Output, Volts DC min.
Isolation resistance, MΩ min.
Isolation capacitance, pF
Isolation safety rating
Miscellaneous
Current limit inception, Amps (Vout
actual ≤ 98% of Vnom.) after warmup
Short circuit protection method
Short circuit current, Amps max.
Short circuit duration (output shorted to ground)➀
2.6
2.5
1
2000
10
1000
2250
10
1000
500
6.5
500
7
150
15.8
BEI15-050-Q12
BEI15-050-Q48
BEI15-120-Q12
BEI15-120-Q48
BEI15-150-Q12
BEI15-150-Q48
See ordering guide
±1
±0.02
10
See ordering guide
150
16
100
18
100
20
Magnetic feedback
2000
10
600
Basic insulation
2250
10
700
2000
10
1000
2250
10
1000
1.1
0.9
0.9
Current limiting, hiccup autorestart
0.3
Continuous
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MDC_BEI15W.A16
Page 3 of 15
BEI15 Series
Isolated Wide Input Bipolar 15-Watt DC/DC Converters
DYNAMIC CHARACTERISTICS
Start-up time, mS, max.
Vin to Vout regulated, mS, max.
(Remote On/Off to Vout regulated)
Dynamic Load Response (50-75-50% load step)
Settling time
Peak deviation
Switching frequency, KHz
Calculated MTBF, hours
Operating temperature range
(Ambient, natural convection, with derating,
vertical mount). See Derating graphs.
No derating
Storage temperature range
Thermal protection/shutdown, °C
(measured at PWM)
Relative humidity, non-condensing
PHYSICAL CHARACTERISTICS
Outline dimensions
Pin material
Pin diameter
Pin Finish
Weight, ounces (grams)
Electromagnetic interference
(requires external filter)
Flammability rating
Safety (designed to meet)
250μSec
±100mV
350
250μSec
±100mV
305
250μSec
±150mV
300
>2000000
250μSec
±150mV
320
250μSec
±200mV
330
250μSec
±200mV
320
BEI15-050-Q12
50
50
BEI15-050-Q48
50
50
BEI15-120-Q12
50
50
BEI15-120-Q48
50
60
BEI15-150-Q12
50
50
BEI15-150-Q48
50
50
-40 to +85°C
-40 to +70°C
-55 to +125°C
130
To +85°C/85%
See mechanical specs
Copper alloy
0.040 inches
1.016 mm
Gold plate over nickel underplate
0.352 (10)
0.352 (10)
Meets EN55022 and CISPR22 with external filter
UL 94V-0
UL/cUL 60950-1
CSA-C22.2 No.60950-1
IEC/EN 60950-1
0.352 (10)
0.352 (10)
0.32 (9.07)
0.32 (9.07)
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Q12 models
Volts, max.,continuous
Volts, transient 100 mS
Q48 models
Volts, max.,continuous
Volts, transient 100 mS
On/Off Control, referred to -Vin
Volts, min.
Volts, max.
Input reverse polarity protection
Output Current, sustained short circuit
Storage Temperature Range
min. °C.
max. °C.
Lead Temperature, °C. max.(soldering, ten seconds)
36
50
75
100
-0.3
15
None, install external fuse
Current-limited, see specs
-55
+125
See soldering guidelines
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MDC_BEI15W.A16
Page 4 of 15
BEI15 Series
Isolated Wide Input Bipolar 15-Watt DC/DC Converters
PERFORMANCE DATA, BEI15-050-Q12
Efficiency vs. Line Voltage and Load Current @ +25°C
85
3.0
Power Dissipation vs. Line Voltage and Load Current @ +25°C
83
Power Dissipation (Watts)
2.5
81
Efficiency (%)
79
77
75
73
71
0.3
0.4
0.5
0.7
0.8
0.9
1.0
1.1
1.3
1.4
1.5
Load Curre nt (Amps)
V
IN
= 9V
V
IN
= 12V
V
IN
= 24V
V
IN
= 36V
2.0
1.5
1.0
V
IN
= 9V
V
IN
= 12V
V
IN
= 24V
V
IN
= 36V
0.5
0.3
0.4
0.5
0.7
0.8
0.9
1.0
1.1
1.3
1.4
1.5
Output Load Curre nt (Amps)
Maximum Current Temperature Derating at Sea Level
(V
IN
= 9V to 36V, airflow is from pin 1 to pin 3)
3
Output Current (Amps)
2
0.33 m/s (65 LFM)
1
0
30
35
40
45
50
55
60
65
Ambient Temperature (ºC)
70
75
80
85
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MDC_BEI15W.A16
Page 5 of 15
Microcontroller MCU
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