BWR Series
3 Watt, Dual Output DC/DC Converters
MDC_BWR3W.B04 Page 1 of 4
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Typical units
SIMPLIFIED SCHEMATIC
Packaged in industry-standard DIP’s, the 3 Watt
dual-output models of DATEL’s XWR Series DC/DC
converters are fully regulated (±0.5% max. line,
±1% max. load), fully isolated (1000Vdc minimum),
extremely effi cient (as high as 78% guaranteed)
building blocks providing true component-like
fl exibility and convenience to designers of modern
distributed power systems.
Exploiting high-frequency (170-200kHz), fl yback
topologies and contemporary,
highly automated, SMT assembly techniques, BWR
Model DC/DC’s have enough room to include input
(pi type) and output fi lters 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 tempera-
ture 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 DATEL’s BWR
Model 3W DC/DC’s ideal replacements for other
more costly, less reliable power converters. Simi-
larly, they are excellent choices for new design-ins
in systems demanding small size, low cost and
high reliability.
PRODUCT OVERVIEWFEATURES
Low Cost!
Automated, SMT-on-pcb construction
No external components required
±5, ±12 or ±15 Volt outputs
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
Fully isolated, 1000Vdc guaranteed
Guaranteed effi ciencies to 78%
–25 to +75°C operation with no derating
UL 1950, CSA 22.2 No. 234 and IEC 950
EMI/EMC characterized
Modifi cations and customs for OEM’s
Typical topology is shown
+V
IN
–
V
IN
+V
OUT
–V
OUT
COMMON
REFERENCE &
ERROR AMP
OPTO
ISOLATION
PWM
CONTROLLER
BWR Series
3 Watt, Dual Output DC/DC Converters
MDC_BWR3W.B04 Page 2 of 4
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PART NUMBER STRUCTURE
PERFORMANCE SPECIFICATIONS AND ORDERING GUIDE
Model
Output Input Effi ciency
Package
(Case/
Pinout)
VOUT
(Volts)
IOUT
(mA, Max.)
R/N (mVp-p) Regulation (Max.) VIN Nom.
(Volts)
Range
(Volts)
IIN
(mA)
Full Load
Typ. Max. Line Load Min. Typ.
BWR-5/250-D12 ±5 ±250 75 120 ±0.5% ±1.0% 12 9-18 35/278 75% 77% C1, P2
BWR-5/250-D48 ±5 ±250 75 120 ±0.5% ±1.0% 48 18-72 10/76 75% 77% C1, P2
BWR-12/105-D5 ±12 ±105 75 150 ±0.5% ±1.0% 5 4.5-9 75/727 70% 72% C1, P2
BWR-12/125-D12 ±12 ±125 75 150 ±0.5% ±1.0% 12 9-18 35/346 73% 75% C1, P2
BWR-12/125-D48 ±12 ±125 75 150 ±0.5% ±1.0% 48 18-72 10/81 78% 80% C1, P2
BWR-15/85-D5 ±15 ±85 75 150 ±0.5% ±1.0% 5 4.5-9 100/736 70% 72% C1, P2
BWR-15/100-D12 ±15 ±100 75 150 ±0.5% ±1.0% 12 9-18 35/346 73% 75% C1, P2
BWR-15/100-D48 ±15 ±100 75 150 ±0.5% ±1.0% 48 18-72 10/81 78% 80% C1, P2
MECHANICAL SPECIFICATIONS
All dimension in Inches (mm)
C
RoHS-6 compliant*
-
*Contact Murata Power Solutions Technologies for availability
Pin
1
2
3
4
5
6
7
8
I/O Connectiions
Function P2
+Input
+Input
–Input
–Input
Common
+Output
Common
–Output
0.020 ±0.002 DIA.
(0.50 8 ±0.051)
0.15 MIN
(3.81)
0.45
(11.43)
1.25
(31.75)
0.200
(5.08)
0.10
(2.54)
0.80
(20.32)
0.600
(15.24)
0.100
(2.54) 0.18
(4.57)
STANDOFFS
0.025
(0.64)
0.600
(15.24)
BOTTOM VIEW
12
34
56
87
PLASTIC CASE WITH AN INSULATED BASE
Case C1
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, 10% to 100% load.
➃ Nominal line voltage, no-load/full-load conditions.
Nominal Output Voltages:
±5, ±12 or ±15 Volts
Maximum Output Current
in mA from each output
Input Voltage Range:
D5 = 4.5-9 Volts (5V nominal)
D12 = 9-18 Volts (12V nominal)
D48 = 18-72 Volts (48V nominal)
Wide Range Input
Output Confi guration:
B = Bipolar
15B WR 100 D48
-/-
BWR Series
3 Watt, Dual Output DC/DC Converters
MDC_BWR3W.B04 Page 3 of 4
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Performance/Functional Specifi cations
Typical @ TA = +25°C under nominal line voltage and full-load conditions unless noted.
Input Voltage:
"D5" Models 12 Volts
"D12" Models 20 Volts
"D48" Models 80 Volts
Input Reverse-Polarity Protection Current must be <2A. Brief duration
only. Fusing recommended.
Output Overvoltage Protection None
Output Current Current limited. Max. current and
short-circuit duration are model
dependent. "D12" and "D48"
models can withstand
sustained output short circuits.
Storage Temperature –40 to +100°C
Lead Temperature (soldering, 10 sec.) +300°C
Input
Input Voltage Range:
"D5" Models 4.5-9 Volts (5V nominal)
"D12" Models 9-18 Volts (12V nominal)
"D48" Models 18-72 Volts (48V nominal)
Input Current See Ordering Guide
Input Filter Type ➁ Pi
Reverse-Polarity Protection Yes (Instantaneous, 2A maximum)
Output
VOUT Accuracy (50% load) ±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 1000Vdc, minimum
Current Limiting:
"D5" Models Power-limiting technique, auto-recovery
"D12" and "D48" Models Hiccup technique, auto-recovery
Dynamic Characteristics
Transient Response (50% load step) 200µsec to ±1% of fi nal value
Switching Frequency:
"D5" Models 200kHz
"D12" and "D48" Models 170kHz
Environmental
Operating Temperature ➃
(Ambient, no derating) –25 to +75°C
Storage Temperature –40 to +100°C
Physical
Dimensions 1.25" x 0.8" x 0.45" (31.8 x 20.3 x 11.4mm)
Case Material Diallyl phthalate, UL94V-0-rated
Pin Material RoHS: Gold plate over copper alloy
Non RoHS: Tin plate over copper alloy
Weight 0.5 ounces (14.2 grams)
➀ These power converters require a minimum 10% loading 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 and perhaps added
internally upon request. Contact DATEL Applications Engineering for details.
➂ Devices can be screened or modifi ed for higher guaranteed isolation voltages.
Contact DATEL Applications Engineering for details.
➃ Devices can be warranted or screened for lower-temperature operation.
Contact DATEL Applications Engineering for details. See DATEL's new BST 3W Models
for guaranteed operation to –40°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
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 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
specifi cations without the use of external input/output capacitors. In critical
applications, input/output ripple and noise may be further reduced by install-
ing electrolytic capacitors across the input terminals and/or low-ESR tanta-
lum 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 47µF, 15V
"D12" Models 10µF, 35V
"D48" Models 4.7µF, 100V
To Reduce Output Ripple
±5V Outputs 47µF, 10V, Low ESR
±12/15V Outputs 22µF, 20V, Low ESR
In critical, space-sensitive applications, DATEL may be able to tailor the inter-
nal input/output fi ltering of these units to meet your specifi c requirements.
Contact our Applications Engineering Group for additional details.
BWR Series
3 Watt, Dual Output DC/DC Converters
MDC_BWR3W.B04 Page 4 of 4
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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. © 2013 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/
If you’re designing with EMC in mind, note that all of DATEL’s 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. Radi-
ated emissions are tested to the limits of FCC Part 15, Class B and CISPR
22 (EN 55022), Class B. Correlation to other specifi cations 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 DATEL’s Applications Engineering Department
for more details.
DATEL’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 qual-
ity-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 industrial
applications. We may already have the converter you need.
Contact us. Our goal is to provide you the highest-quality, most cost-effec-
tive power converters available.
EMI RADIATED EMISSIONS
CUSTOM CAPABILITIES
80
70
60
50
40
30
20
10
0
–10
–20
Frequency (MHz)
100 1000
Radiated Emissions
FCC Class B Limit
BWR-5/250-D12 Radiated Emissions
FCC Part 15 Class B, 3 Meters
Converter Output = ±5Vdc @ ±203mA
Radiated Emissions (dBµV/M)
BWR-5/250-D12 Radiated Emissions
EN 55022 Class B, 10 Meters
Converter Output = ±5Vdc @ ±203mA
80
70
60
50
40
30
20
10
0
–10
–20
Fre
q
uenc
y
(
MHz
)
100 1000
Radiated Emissions
EN 55022 Class B Limit
Radiated Emissions (dBµV/M)
Input Fusing
Certain applications and/or safety agencies may require the installation of
fuses at the inputs of power conversion components. For DATEL BWR 3
Watt
DC/DC Converters, you should use slow-blow type fuses with values
no greater than the following:
V
IN Range Fuse Value
"D5" 1.5A
"D12" 1A
"D48" 0.5A
Figure 2. Using External Capacitors to Reduce
Input/Output Ripple/Noise
1, 2
3, 4
6
8
5, 7
C
IN
C
OUT
C
OUT
+
+
+
–OUTPUT
+INPUT
–INPUT
+OUTPUT
COMMON
