PRODUCT OVERVIEW
It’s hard to beat the combination of low cost, small size (standard 2" x 1" x 0.375" package)
proven reliability and outstanding electrical performance offered by the 7-10W, dual-output
models of MPS’s new A-Series DC/DC converters. These highly effi cient, rugged convert-
ers combine straightforward circuit topologies, the newest components, proven SMT-on-pcb
construction methods, and highly repeatable automatic-assembly techniques. Their superior
durability is substantiated by a rigorous in-house qualifi cation program that includes HALT
(Highly Accelerated Life Testing).
The wide input voltage ranges of these A-Series duals (4.7-7.25V for "D5A" models,
9-18V for "D12A" models and 18-75V for "D48A" models) make them excellent candidates
for battery-powered systems or for distributed power architectures. Their ±5, ±12 or ±15 Volt
outputs cover virtually all standard applications.
These popular power converters are fully isolated (1500Vdc guaranteed) and display excel-
lent line and load regulation (±0.3% max. for line and ±1% max. for load). They are completely
I/O protected (input overvoltage shutdown and reverse-polarity protection, output current limit-
ing and overvoltage protection) and contain input (pi type) and output fi ltering to reduce noise.
They require no external components and offer true "plug-and-play" convenience.
These extremely reliable, cost-effective power converters carry industry-standard pinouts
making them ideal replacements for other more costly, less reliable power converters in com-
puter, telecom/datacom, instrumentation and ATE applications. They are an excellent choice for
both new design-ins and upgrading older systems.
Figure 1. Simplifi ed Schematic
Typical units
+V
(1)
(2)
(3)
(4)
(5)
IN
–
V
IN
+V
OUT
–V
OUT
COMMON
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
Typical topology is shown.
FEATURES
Low cost! Highly reliable!
Proven SMT-on-pcb construction
Qual tested; HALT tested; EMC tested
Designed to meet UL/EN60950-1
Output voltages: ±5, ±12 or ±15 Volts
Wide input voltage ranges:
4.7-7.25V, 9-18V or 18-75V
Small packages, 2" x 1" x 0.375"
Industry-standard pinouts
Fully isolated, 1500Vdc guaranteed
Guaranteed effi ciencies to 82%
–40 to +100°C operating temperature
Modifi cations and customs for OEM’s
Select models are RoHS compliant
BWR Models
7-10W, Dual Output DC-DC converters
MDC_BWR-7-10.F01 Page 1 of 5
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For full details go to
www.murata-ps.com/rohs
PERFORMANCE SPECIFICATIONS SUMMARY AND ORDERING GUIDE ➀
Model
Output Input Effi ciency
Package
(Case/
Pinout)
VOUT
(Volts)
IOUT
(mA, Max.)
R/N (mVp-p) ➁ Regulation (Max.) VIN Nom.
(Volts)
Range
(Volts)
IIN ➃
(mA)
Full Load
Typ. Max. Line Load ➂Min. Typ.
BWR-5/700-D48A-C* ±5 ±700 50 100 ±0.3% ±1.0% 48 18-75 15/180 79% 81% C2, P12
BWR-12/415-D12A-C* ±12 ±415 100 120 ±0.3% ±1.0% 12 9-18 20/986 83% 84% C2, P12
BWR-12/415-D48A-C* ±12 ±415 75 120 ±0.3% ±1.0% 48 18-75 15/249 80.5% 84% C2, P12
BWR-15/330-D12A-C* ±15 ±330 75 120 ±0.15% ±0.2% 12 9-18 25/980 83% 84% C2, P12
BWR-15/330-D48A-C* ±15 ±330 75 120 ±0.3% ±1.0% 48 18-75 15/250 80.5% 82.5% C2, P12
BWR-5/700-D5A-C ±5 ±700 50 75 ±0.3% ±1.0% 5 4.7-7.25 25/1772 76% 79% C2, P12
BWR-5/900-D12A-C* ±5 ±900 75 100 ±0.3% ±1.0% 12 9-18 25/930 81% 82% C2, P12
BWR-12/335-D5A-C ±12 ±335 75 120 ±0.3% ±1.0% 5 4.7-7.25 40/1846 76% 78% C2, P12
BWR-15/275-D5A-C ±15 ±275 75 120 ±0.3% ±1.0% 5 4.7-7.25 40/2089 75% 79% C2, P12
1
2
3
4
5
METAL CASE
INSULATED BASE
2.00
(50.80)
0.20 MIN
(5.08)
1.00
(25.40) 0.400
(10.16)
0.800
(20.32)
0.800
(20.32)
0.375
(9.53)
0.040 ±0.002 DIA.
(1.016 ±0.051)
BOTTOM VIEW
0.200
(5.08)
0.100
(2.54)
0.10
(2.54)
0.60
(15.24)
DIMENSIONS ARE IN INCHES (MM)
Case C2
Notes:
For "D5A" and "D12A"models, the
case is connected to pin 2 (–VIN).
For "D48A" models, the case
is connected to pin 1 (+VIN).
Input Voltage Range:
D5 = 4.7-7.25 Volts (5V nominal)
D12 = 9-18 Volts (12V nominal)
D48 = 18-75 Volts (48V nominal)
Nominal Output Voltages:
±5, ±12 or ±15 Volts
Maximum Output Current
in mA from each output
Wide Range Input
Output Confi guration:
B = Bipolar
A-Series
High Reliability
15B WR 330 D12 A-/-
Output Power (Watts)
Ambient Temperature (°C)
10
9
8
7
6
5
4
3
2
1
0
BWR-5/700-D5A E
BWR-5/900-D12A C
BWR-5/700-D48A F
BWR-12/335-D5A D
BWR-12/415-D12A A
BWR-12/415-D48A A
BWR-15/275-D5A D
BWR-15/330-D12A A
BWR-15/330-D48A B
D
D, E
E, F
–40 0 40 45 50 55 60 65 70 75 80 85 90 95 10 0
A, B
C
B
C
F
A
PART NUMBER STRUCTURE
TEMPERATURE DERATING
MECHANICAL SPECIFICATIONS
I/O Connections
Pin Function P12
1 +Input
2 –Input
3 +Output
4 Common
5 –Output
➀ Typical at TA = +25°C under nominal line voltage and full-load conditions unless otherwise noted.
➁ Ripple/Noise (R/N) measured over a 20MHz bandwidth.
➂ Balanced loads, 20% to 100% load.
➃ Nominal line voltage, no-load/full-load conditions.
* Magnetic feedback.
C-
RoHS-6 Compliance
Not all model combinations are available. Contact Murata Power Solutions.
BWR Models
7-10W, Dual Output DC-DC converters
MDC_BWR-7-10.F01 Page 2 of 5
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TECHNICAL NOTES
Floating Outputs
Since these are isolated DC/DC converters, their outputs are "fl oating." Any
BWR model may be confi gured 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 3 and 5), with either output grounded. The
Common pin (pin 4) should be left open. Minimum 20% loading is recom-
mended under these conditions.
Filtering and Noise Reduction
All A-Series BWR 7-10 Watt DC/DC Converters achieve their rated ripple
and noise specifi cations without the use of external input/output capaci-
tors. In critical 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 3 or 5) and Common (pin 4) 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
"D5A" Models 47µF, 10V
"D12A" Models 20µF, 35V
"D48A" Models 10µF, 100V
To Reduce Output Ripple
±5V Output 47µF, 10V, Low ESR
±12/15V Outputs 22µF, 20V, Low ESR
In critical, space-sensitive applications, MPS may be able to tailor the internal
input/output fi ltering of these units to meet your specifi c requirements. Con-
tact our Applications Engineering Group for additional details.
➀ These power converters require a minimum 20% loading on each output to maintain
specifi ed regulation. Operation under no-load conditions will not damage these devices;
however they may not meet all listed specifi cations.
➁ Application-specifi c internal input/output fi ltering can be recommended or perhaps added
internally upon request. Contact MPS Applications Engineering for details.
➂ Devices can be screened or modifi ed for higher guaranteed isolation voltages.
Contact MPS Applications Engineering for details.
➃ D5A Models: Zener/transorb only
Performance/Functional Specifi cations
Typical @ TA = +25°C under nominal line voltage and full-load conditions, unless noted. ➀
Input
Input Voltage Range:
D5A Models 4.7-7.25 Volts (5V nominal)
D12A Models 9-18 Volts (12V nominal)
D48A Models 18-75 Volts (48V nominal)
Input Current See Ordering Guide
Input Filter Type ➁ Pi
Reverse-Polarity Protection Yes (Instantaneous, 6A maximum)
Output
VOUT Accuracy (50% load):
±5V Outputs ±1.5%, maximum
±12/15V Outputs ±1%, maximum
Temperature Coeffi cient ±0.02% per °C
Ripple/Noise (20MHz BW) ➁ See Ordering Guide
Line/Load Regulation See Ordering Guide
Effi ciency See Ordering Guide
Isolation Voltage ➂ 1500Vdc, minimum (functional)
Isolation Capacitance 200pF
Current Limiting Auto-recovery
Overvoltage Protection ➃ Zener/transorb clamps, magnetic feedback
Dynamic Characteristics
Transient Response (50% load step) 200µsec max. to ±1.5% of fi nal value
Switching Frequency 165kHz (±15kHz)
Environmental
Operating Temperature (ambient):
Without Derating –40 to +65/70°C (Model dependent)
With Derating to +100°C (See Derating Curves)
Storage Temperature –40 to +105°C
Physical
Dimensions 2" x 1" x 0.375" (51 x 25 x 9.5mm)
Shielding 5-sided
Case Connection:
D5A and D12A Models Pin 2 (–VIN)
D48A Models Pin 1 (+VIN)
Case Material Corrosion resistant steel with
non-conductive, epoxy-based black
enamel fi nish and palstic baseplate
Pin Material RoHS: Gold-plated copper alloy with nickel
underplate
Non-RoHS: Solder-coated brass
Weight 1.3 ounces (37 grams)
Flammability UL 94V-0
Input Voltage:
D5 Models 10 Volts
D12 Models 20 Volts
D48 Models 80Volts
Input Reverse-Polarity Protection Current must be <6A. Brief
duration only. Fusing recommended.
Output Overvoltage Protection
±5V Outputs 13 Volts, limited duration
±12V Outputs 28 Volts, limited duration
±15V Outputs 36 Volts, limited duration
Output Current Current limited. Max. current and
short-circuit duration are model
dependent.
Storage Temperature –40 to +105°C
Lead Temperature (soldering, 10 sec.) +300°C
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 Specifi cations Table is not implied.
Absolute Maximum Ratings
BWR Models
7-10W, Dual Output DC-DC converters
MDC_BWR-7-10.F01 Page 3 of 5
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If you’re designing with EMC in mind, please note that all of MPS’s BWR
7-10 Watt A-Series DC/DC Converters have been characterized for radi-
ated 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 specifi ca-
tions can be supplied upon request. Radiated emissions plots to FCC and
CISPR 22 for model BWR-15/330-D48A appear below. Published EMC test
reports are available for each model number. Contact MPS’s Applications
Engineering Department for more details.
Figure 2. Using External Capacitors to Reduce
Input/Output Ripple/Noise
1
2
3
5
4
CIN
COUT
COUT
+
+
+
–OUTPUT
+INPUT
–INPUT
+OUTPUT
COMMON
Input Fusing
Certain applications and/or safety agencies may require the installation of
fuses at the inputs of power conversion components. For MPS A-Series
BWR 7-10 Watt DC/DC Converters, you should use slow-blow type fuses
with values no greater than the following:
V
IN Range Fuse Value
"D5A" 3A
"D12A" 2A
"D48A" 1A
80
70
60
50
40
30
20
10
0
–10
–20
Fre
q
uenc
y
(
MHz
)
100 1000
FCC Class B Limit
BWR-15/330-D48A Radiated Emissions
FCC Part 15 Class B, 3 Meters
Converter Output = ±15Vdc @ ±300mA
Radiated Emissions (dBµV/M)
Radiated Emissions
BWR-15/330-D48A Radiated Emissions
EN 55022 Class B, 10 Meters
Converter Output = ±15Vdc @ ±300mA
80
70
60
50
40
30
20
10
0
–10
–20
Frequency (MHz)
100 1000
Radiated Emissions
EN 55022 Class B Limit
Radiated Emissions (dBµV/M)
MPS’s world-class design, development and manufacturing 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!
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.
CUSTOM CAPABILITIES
EMI RADIATED EMISSIONS
BWR Models
7-10W, Dual Output DC-DC converters
MDC_BWR-7-10.F01 Page 4 of 5
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Quality and Reliability
The A-Series are the fi rst DC/DC Converters to emerge from MPS’s new,
company-wide approach to designing and manufacturing the most reliable
power converters available. The fi ve-pronged program draws our Quality
Assurance function into all aspects of new-product design, development,
characterization, qualifi cation and manufacturing.
Design for Reliability
Design for Reliability is woven throughout our multi-phased, new-product-
development process. Design-for-reliability practices are fully documented
and begin early in the new-product development cycle with the following
goals:
1. To work from an approved components/vendors list ensuring the use of
reliable components and the rigorous qualifi cation of new components.
2. To design with safety margins by adhering to a strict set of derating
guidelines and performing theoretical worst-case analyses.
3. To locate potential design weaknesses early in the product-development
cycle by using extensive HALT (Highly Accelerated Life Testing).
4. To prove that early design improvements are effective by employing a
thorough FRACA (Failure Reporting Analysis and Corrective Action) system.
HALT Testing
The goal of the accelerated-stress techniques used by MPS is to force
device maturity, in a short period of time, by exposing devices to excessive
levels of "every stimulus of potential value." We use HALT (Highly Acceler-
ated Life Testing) repeatedly during the design and early manufacturing
phases to detect potential electrical and mechanical design weaknesses
that could result in possible future fi eld failures.
During HALT, prototype and pre-production DC/DC converters are sub-
jected to progressively higher stress levels induced by thermal cycling,
rate of temperature change, vibration, power cycling, product-specifi c
stresses (such as dc voltage variation) and combined environments. The
stresses are not meant to simulate fi eld environments but to expose any
weaknesses in a product’s electro/mechanical design and/or assem-
bly processes. The goal of HALT is to make products fail so that device
weaknesses can be analyzed and strengthened as appropriate. Applied
stresses are continually stepped up until products eventually fail. After
corrective actions and/or design changes, stresses are stepped up again
and the cycle is repeated until the "fundamental limit of the technology" is
determined.
MPS has invested in a Qualmark OVS-1 HALT tester capable of applying
voltage and temperature extremes as well as 6-axis, linear and rota-
tional, random vibration. A typical HALT profi le (shown above) consists of
thermal cycling (–55 to +125°C, 30°C/minute) and simultaneous, gradually
increasing, random longitudinal and rotational vibration up to 20G’s with
load cycling and applied-voltage extremes added as desired. Many devices
in MPS’s new A-Series could not be made to fail prior to reaching either
the limits of the HALT chamber or some previously known physical limit of
the device. We also use the HALT chamber and its ability to rapidly cool
devices to verify their "cold-start" capabilities.
Qualifi cation
For each new product, electrical performance is verifi ed via a comprehen-
sive characterization process and long-term reliability is confi rmed via a
rigorous qualifi cation procedure. The qual procedure includes such strenu-
ous tests as thermal shock and 500 hour life. Qual testing is summarized
below.
In-Line Process Controls and Screening
A combination of statistical sampling and 100% inspection techniques
keeps
our assembly line under constant control. Parameters such as solder-paste
thickness, component placement, cleanliness, etc. are statistically sampled,
charted and fi ne tuned as necessary. Visual inspections are performed by
trained operators after pick-and-place, soldering and cleaning operations.
Units are 100% electrically tested prior to potting. All devices are tem-
perature cycled, burned-in, hi-pot tested and fi nal-electrical tested prior to
external visual examination, packing and shipping.
Rapid Response to Problems
MPS employs an outstanding corrective-action system to immediately
address any detected shortcomings in either products or processes. When-
ever our assembly, quality or engineering personnel spot a product/process
problem, or if a product is returned with a potential defect, we immediately
perform a detailed failure analysis and, if necessary, undertake corrective
actions. Over time, this system has helped refi ne our assembly operation to
yield one of the lowest product defect rates in the industry.
Typical HALT Profi le
Qualifi cation Test Method/Comments
HALT MPS in-house procedure
High Temperature Storage Max. rated temp., 1,000 hours
Thermal Shock 10 cycles, –55 to +125°C
Temperature/Humidity +85°C, 85% humidity, 48 hours
Lead Integrity MPS in-house procedure
Life Test +70°C, 500 hours*
Marking Permanency MPS in-house procedure
End Point Electrical Tests Per product specifi cation
Qualifi cation Testing
* Interim electrical test at 200 hours.
10 20 30 40 50 60 70 80 90
40
20
0
Rand ib atin
eeatue
et ie inute
100
80
60
40
20
0
–20
–40
BWR Models
7-10W, Dual Output DC-DC converters
MDC_BWR-7-10.F01 Page 5 of 5
www.murata-ps.com/support
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. Specifi cations are subject to change without
notice. © 2014 Murata Power Solutions, Inc.
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfi eld, 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/
