www.murata-ps.com
BWR Series
3 Watt, Dual Output DC-DC Converters
Typical units
FEATURES
Cost!
Low
Automated, SMT-on-pcb construction
external components required
No
±12 or ±15 Volt outputs
±5,
Choice of 3 input voltage ranges:
4.5-9 Volts
9-18 Volts
18-72 Volts
1.25" x 0.8" x 0.45" DIP form factor
Industry-standard package and pinout
isolated, 1000Vdc guaranteed
Fully
Guaranteed efficiencies to 78%
to +75°C operation with no derating
–25
1950, CSA 22.2 No. 234 and IEC 950
UL
EMI/EMC characterized
cations and customs for OEM’s
Modifi
PRODUCT OVERVIEW
Packaged in industry-standard DIP’s, the 3 Watt
dual-output models of Murata Power Solutions’
XWR Series DC-DC converters are fully regulated
(±0.5% max. line, ±1% max. load), fully isolated
(1000Vdc minimum), extremely efficient (as high
as 78% guaranteed) building blocks providing
true component-like flexibility and convenience to
designers of modern distributed power systems.
Exploiting high-frequency (170-200kHz), flyback to-
pologies and contemporary, highly automated, SMT
assembly techniques, BWR Model DC-DC’s have
enough room to include input (pi type) and output
filters within their package. Offering true "plug-
and-play" convenience, these power converters
require no external components. They operate over
the full –25 to +75°C temperature range with no
output power derating.
Output voltages are either ±5, ±12 or ±15 Volts.
Input voltage ranges are either
4.5-9V ("D5" models), 9-18V ("D12" models) or
an ultra-wide 18-72V ("D48" models). Transient
response time is a quick 200μsec.
These extremely rugged modules are fully encap-
sulated with a thermally conductive potting com-
pound. They are moisture and vibration resistant
and have established a reputation for outstanding
MTBF. For telecommunication, computer and other
EMI-sensitive applications, these DIP-packaged
DC-DC converters offer full EMI/EMC characteriza-
tion data.
Industry-standard pinouts make Murata Power
Solutions’ BWR Model 3W DC-DC’s ideal replace-
ments for other more costly, less reliable power
converters. Similarly, they are excellent choices for
new design-ins in systems demanding small size,
low cost and high reliability.
SIMPLIFIED SCHEMATIC
+V
IN
+V
OUT
COMMON
–V
OUT
–V
IN
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
Typical topology is shown
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
MDC_BWR3W.D01
Page 1 of 4
BWR Series
3 Watt, Dual Output DC-DC Converters
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE
Output
Model
BWR-5/250-D12-C
BWR-5/250-D48-C
BWR-12/125-D12-C
BWR-12/125-D48-C
BWR-15/100-D12-C
BWR-15/100-D48-C
BWR-12/105-D5-C
BWR-15/85-D5-C
Input
I
IN
(mA)
35/278
10/76
35/346
10/81
35/346
10/81
75/727
100/736
Efficiency
Full Load
Min.
75%
75%
73%
78%
73%
78%
70%
70%
V
OUT
(Volts)
±5
±5
±12
±12
±15
±15
±12
±15
R/N (mVp-p)
Regulation (Max.)
V
IN
Nom. Range
I
OUT
(mA, Max.) Typ. Max.
(Volts) (Volts)
Line
Load
±250
±250
±125
±125
±100
±100
±105
±85
75
75
75
75
75
75
75
75
120
120
150
150
150
150
150
150
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±1.0%
±1.0%
±1.0%
±1.0%
±1.0%
±1.0%
±1.0%
±1.0%
12
48
12
48
12
48
5
5
9-18
18-72
9-18
18-72
9-18
18-72
4.5-9
4.5-9
Typ.
77%
77%
75%
80%
75%
80%
72%
72%
Package
(Case/
Pinout)
C1, P2
C1, P2
C1, P2
C1, P2
C1, P2
C1, P2
C1, P2
C1, P2
➀
➁
➂
➃
Typical at T
A
= +25°C under nominal line voltage and full-load conditions unless otherwise noted.
Ripple/Noise (R/N) measured over a 20MHz bandwidth.
Balanced loads, 10% to 100% load.
Nominal line voltage, no-load/full-load conditions.
PART NUMBER STRUCTURE
MECHANICAL SPECIFICATIONS
All dimension in Inches (mm)
1.25
(31.75)
STANDOFFS
0.025
(0.64)
B WR
-
15
/
100
-
D48
-
C
Output Configuration:
B
= Bipolar
Wide Range Input
Nominal Output Voltages:
±5, ±12 or ±15 Volts
RoHS-6 compliant*
Input Voltage Range:
D5
= 4.5-9 Volts (5V nominal)
D12
= 9-18 Volts (12V nominal)
D48
= 18-72 Volts (48V nominal)
Maximum Output Current
in mA from each output
0.45
(11.43)
Case C1
0.020 ±0.002 DIA.
(0.508 ±0.051)
0.600
(15.24)
0.200
(5.08)
0.100
(2.54)
0.18
(4.57)
0.15 MIN
(3.81)
*Contact Murata Power Solutions Technologies for availability
3 4
7
8
0.600
(15.24)
1 2
5
6
0.80
(20.32)
BOTTOM VIEW
PLASTIC CASE WITH AN INSULATED BASE
0.10
(2.54)
I/O Connectiions
Pin
1
2
3
4
5
6
7
8
Function P2
+Input
+Input
–Input
–Input
Common
+Output
Common
–Output
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MDC_BWR3W.D01
Page 2 of 4
BWR Series
3 Watt, Dual Output DC-DC Converters
Performance/Functional Specifications
Input
Input Voltage Range:
"D5" Models
"D12" Models
"D48" Models
Input Current
Input Filter Type
➁
Reverse-Polarity Protection
V
OUT
Accuracy
(50% load)
Temperature Coefficient
Ripple/Noise
(20MHz BW)
➁
Line/Load Regulation
Efficiency
Isolation Voltage
➂
Current Limiting:
"D5" Models
"D12" and "D48" Models
Transient Response
(50% load step)
Switching Frequency:
"D5" Models
"D12" and "D48" Models
Operating Temperature
➃
(Ambient, no derating)
Storage Temperature
Dimensions
11.4mm)
Case Material
Pin Material
Weight
4.5-9 Volts (5V nominal)
9-18 Volts (12V nominal)
18-72 Volts (48V nominal)
See Ordering Guide
Pi
Yes (Instantaneous, 2A maximum)
Output Overvoltage Protection
Output Current
Typical @ T
A
= +25°C under nominal line voltage and full-load conditions unless noted.
Absolute Maximum Ratings
Input Voltage:
"D5" Models
"D12" Models
"D48" Models
Input Reverse-Polarity Protection
12 Volts
20 Volts
80 Volts
Current must be <2A. Brief duration
only. Fusing recommended.
None
Current limited. Max. current and
short-circuit duration are model
dependent. "D12" and "D48"
can withstand
circuits.
–40 to +100°C
+300°C
Output
±1%, maximum
±0.02% per °C
See Ordering Guide
See Ordering Guide
See Ordering Guide
1000Vdc, minimum
Power-limiting technique, auto-recovery
Hiccup technique, auto-recovery
models
sustained output short
Storage Temperature
Lead Temperature
(soldering, 10 sec.)
These are stress ratings. Exposure of devices to any of these conditions may adversely
affect long-term reliability. Proper operation under conditions other than those listed in
the Performance/Functional Specifications Table is not implied.
Dynamic Characteristics
200μsec to ±1% of final value
TECHNICAL NOTES
Floating Outputs
200kHz
170kHz
Environmental
–25 to +75°C
–40 to +100°C
Since these are isolated DC-DC converters, their outputs are "floating." Any
BWR model may be configured to produce an output of 10V, 24V or 30V
(for ±5V, ±12V or ±15V models, respectively) by applying the load across
the +Output and –Output pins (pins 6 and 8), with either output grounded.
The Common (pins 5 and 7) should be left open. Minimum 20% loading is
recommended under these conditions.
Filtering and Noise Reduction
All BWR 3 Watt DC-DC Converters achieve their rated ripple and noise
specifications without the use of external input/output capacitors. In criti-
cal applications, input/output ripple and noise may be further reduced by
installing electrolytic capacitors across the input terminals and/or low-ESR
tantalum or electrolytic capacitors across the output terminals. Output
capacitors should be connected between their respective output pin (pin 6
or 8) and Common (pins 5 and 7) as shown in Figure 2. The caps should
be located as close to the power converters as possible. Typical values are
listed in the tables below. In many applications, using values greater than
those listed will yield better results.
To Reduce Input Ripple
"D5" Models
"D12" Models
"D48" Models
To Reduce Output Ripple
±5V Outputs
±12/15V Outputs
47μF, 15V
10μF, 35V
4.7μF, 100V
47μF, 10V, Low ESR
22μF, 20V, Low ESR
Physical
1.25" x 0.8" x 0.45" (31.8 x 20.3 x
Diallyl phthalate, UL94V-0-rated
RoHS: Gold plate over copper alloy
Non RoHS: Tin plate over copper alloy
0.5 ounces (14.2 grams)
➀
These power converters require a minimum 10% loading to maintain specified regulation.
Operation under no-load conditions will not damage these devices; however they may not
meet all listed specifications.
➁
Application-specific internal input/output filtering can be recommended and perhaps added
internally upon request. Contact Murata Power Solutions Applications Engineering for details.
➂
Devices can be screened or modified for higher guaranteed isolation voltages.
Contact Murata Power Solutions Applications Engineering for details.
➃
Devices can be warranted or screened for lower-temperature operation.
Contact Murata Power Solutions Applications Engineering for details. See Murata Power Solu-
tions’ new BST 3W Models for guaranteed operation to –40°C.
In critical, space-sensitive applications, Murata Power Solutions may be
able to tailor the internal input/output filtering of these units to meet your
specific requirements. Contact our Applications Engineering Group for
additional details.
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MDC_BWR3W.D01
Page 3 of 4
BWR Series
3 Watt, Dual Output DC-DC Converters
EMI RADIATED EMISSIONS
+OUTPUT
1, 2
+INPUT
+
C
IN
3, 4
–INPUT
8
–OUTPUT
COMMON
+
C
OUT
5, 7
6
+
C
OUT
If you’re designing with EMC in mind, note that all of Murata Power Solu-
tions’ BWR 3 Watt DC-DC Converters have been characterized for radiated
and conducted emissions in our new EMI/EMC laboratory. Testing is
conducted in an EMCO 5305 GTEM test cell utilizing EMCO automated EMC
test software. Radiated emissions are tested to the limits of FCC Part 15,
Class B and CISPR 22 (EN 55022), Class B. Correlation to other specifica-
tions can be supplied upon request. Radiated emissions plots to FCC and
CISPR 22 for model BWR-5/250-D12 appear below. Published EMC test
reports are available for each model number. Contact Murata Power Solu-
tions’ Applications Engineering Department for more details.
BWR-5/250-D12 Radiated Emissions
FCC Part 15 Class B, 3 Meters
Converter Output = ±5Vdc @ ±203mA
80
70
60
Figure 2. Using External Capacitors to Reduce
Input/Output Ripple/Noise
Input Fusing
Radiated Emissions (dBµV/M)
Certain applications and/or safety agencies may require the installation of
fuses at the inputs of power conversion components. For Murata Power
Solutions BWR 3 Watt DC-DC Converters, you should use slow-blow type
fuses with values no greater than the following:
V
IN
Range
"D5"
"D12"
"D48"
Fuse Value
1.5A
1A
0.5A
FCC Class B Limit
50
40
30
20
10
0
Radiated Emissions
–10
–20
100
1000
Frequency (MHz)
CUSTOM CAPABILITIES
Murata Power Solutions’ world-class design, development and manu-
facturing team stands ready to work with you to deliver the exact power
converter you need for your demanding, large volume, OEM applications.
And ... we’ll do it on time and within budget!
Radiated Emissions (dBµV/M)
BWR-5/250-D12 Radiated Emissions
EN 55022 Class B, 10 Meters
Converter Output = ±5Vdc @ ±203mA
80
70
Our experienced applications and design staffs; quick-turn prototype
capability; highly automated, SMT assembly facilities; and in-line SPC
quality-control techniques combine to give us the unique ability to design
and deliver any quantity of power converters to the highest standards of
quality and reliability.
We have compiled a large library of DC-DC designs that are currently used
in a variety of telecom, medical, computer, railway, aerospace and indus-
trial applications. We may already have the converter you need.
Contact us. Our goal is to provide you the highest-quality, most cost-
effective power converters available.
60
50
EN 55022 Class B Limit
40
30
20
10
0
Radiated Emissions
–10
–20
100
1000
Frequency (MHz)
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to:
http://www.murata-ps.com/requirements/
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other
technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply
the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without
notice.
© 2015 Murata Power Solutions, Inc.
www.murata-ps.com/support
MDC_BWR3W.D01
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