www.murata-ps.com
BWR Models
15-20W, Dual Output DC/DC Converters
FEATURES
cost! Highly reliable!
Low
Proven SMT-on-pcb construction
tested; HALT tested; EMC tested
Qual
Designed to meet UL/ EN60950-1,
BASIC insulation (48V
IN
models)
mark available (48V
IN
models)
Output voltages: ±5, ±12 or ±15 Volts
Ultra-wide input voltage ranges:
4.7-7.5V, 9-36V or 18-75V
Small packages, 2" x 2" x 0.45"
Industry-standard pinouts
isolated, 1500Vdc guaranteed
Fully
Guaranteed efficiencies to 82%
to +100°C operating temperature
–40
Modifications and customs for OEM’s
PRODUCT OVERVIEW
For your mid-range power requirements, it’s hard to beat the combination of low cost, proven
reliability and outstanding electrical performance offered by the
15-20W, dual-output models of MPS’s new A-Series DC/DC converters. These highly efficient, rugged
converters 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 qualification program that includes HALT (Highly
Accelerated Life Testing).
The ultra-wide input voltage ranges of the A-Series duals (4.7-7.5V for "D5A" models, 9-36V
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 excellent
line and load regulation (with specs as low as ±0.3% max. for line and ±0.5% max. for load). They
are completely I/O protected (input overvoltage shutdown and reverse-polarity protection, output
current limiting and overvoltage protection) and contain input (pi type) and output filtering to reduce
noise. They require no external components and offer true "plug-and-play" convenience.
These extremely reliable, cost-effective power converters are housed in standard 2" x 2" x
0.45" metal packages coated with electrically non-conductive materials. They offer industry-stan-
dard pinouts and are ideally suited for high-volume computer, telecom/datacom, instrumentation and
ATE applications.
+V
IN
(1)
+V
OUT
(5)
COMMON
(6)
–V
IN
(2)
–V
OUT
(7)
ON/OFF
CONTROL
(4)
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
TRIM
(8)
Typical topology is shown.
Figure 1. Simplified Schematic
For full details go to
www.murata-ps.com/rohs
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MDC_BWR15_20_B05
Page 1 of 6
BWR Models
15-20W, Dual Output DC/DC Converters
Performance Specifications and Ordering Guide
Output
Model
BWR-5/1500-D5A
BWR-5/1700-D12A
BWR-5/1700-D48A
BWR-12/625-D5A
BWR-12/830-D12A
BWR-12/830-D48A
BWR-15/500-D5A
BWR-15/670-D12A
BWR-15/670-D48A
➀
➁
➂
➃
➀
Input
Regulation (Max.)
Line
±0.5%
±0.3%
±0.3%
±0.5%
±0.3%
±0.4%
±0.5%
±0.3%
±0.3%
V
OUT
(Volts)
±5
±5
±5
±12
±12
±12
±15
±15
±15
I
OUT
(mA)
±1500
±1700
±1700
±625
±830
±830
±500
±670
±670
R/N (mVp-p)
➁
Typ.
50
75
75
75
75
75
75
75
75
Max.
100
100
100
120
100
100
150
100
100
Load
➂
±1.0%
±0.5%
±0.5%
±1.0%
±0.5%
±0.5%
±1.0%
±0.5%
±0.5%
V
IN
Nom.
(Volts)
5
24
48
5
24
48
5
24
48
Range
(Volts)
4.7-7.5
9-36
18-75
4.7-7.5
9-36
18-75
4.7-7.5
9-36
18-75
I
IN
➃
(mA)
75/3750
15/753
15/377
75/3750
30/1000
15/510
75/3659
30/979
15/484
Efficiency
Min.
79%
80.5%
81%
79%
81.5%
81%
80%
82%
82%
Typ.
80%
83%
83%
81%
83%
83%
82%
83%
84%
Package
(Case,
Pinout)
C4, P7
C4, P7
C4, P7
C4, P7
C4, P7
C4, P7
C4, P7
C4, P7
C4, P7
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, 20% to 100% load.
Nominal line voltage, no-load/full-load conditions.
M E C H A N I C A L S P E C I F I C AT I O N S
2.00
(50.80)
ME T A L C A S E
PA R T N U M B E R S T R U C T U R E
B WR
-
12
/
830
-
D48 A
-
C
Output Configuration:
B
= Bipolar
Wide Range Input
Nominal Output Voltages:
±5, ±12 or ±15 Volts
RoHS-6 Hazardous
Substance Compliant*
A-Series
High Reliability
Input Voltage Range:
D5
= 4.7-7.5 Volts (5V nominal)
D12
= 9-36 Volts (24V nominal)
D48
= 18-75 Volts (48V nominal)
0.45
(11.43)
Case C4
0.20 MIN
(5.08)
IN S U LA T E D B A S E
0.040 ±0.002 D IA .
(1.016 ±0.051)
1.800
(45.72)
0.10
(2.54)
Maximum Output Current
in mA from each output
0.200
(5.08)
5
* Contact Murata Power Solutions for availability
1
6
T E M P E R AT U R E D E R AT I N G
2
0.400
(10.16)
4
7
1.200
(30.48)
3 E Q . SP. @
0.400 ( 10.16)
2.00
(50.80)
20
19
18
17
16
15
C
B
A
0.100
(2.54)
B O T T O M V IE W
8
0.40
(10.16)
Output Power (Watts)
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
–40
0
40
45
50
55
60
65
70
75
80
85
90
95
100
BWR-5/1500-D5A
BWR-5/1700-D12A
BWR-5/1700-D48A
BWR-12/625-D5A
BWR-12/830-D12A
BWR-12/830-D48A
BWR-15/500-D5A
BWR-15/670-D12A
BWR-15/670-D48A
C
B
B
C
A
A
C
A
A
I/O Connections
Pin
1
2
3
4
5
6
7
8
Function P7
+Input
–Input
No Pin
On/Off Control
+Output
Common
–Output
Trim
Dimensions are in inches (mm) shown for ref. only.
Third Angle Projection
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 2˚
Components are shown for reference only.
Notes:
For "D5A" and "D12A" models,
the case is connected to pin
2 (–V
IN
).
For "D48A" models, the case is
connected to pin 1 (+V
IN
).
Ambient Temperature (°C)
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MDC_BWR15_20_B05
Page 2 of 6
BWR Models
Performance/Functional Specifications
Typical @ T
A
= +25°C under nominal line voltage and full-load conditions, unless noted.
➀
15-20W, Dual Output DC/DC Converters
Absolute Maximum Ratings
Input Voltage:
D5A Models
D12A Models
D48A Models
Input Reverse-Polarity Protection
Output Overvoltage Protection
±5V Outputs
±12V Outputs
±15V Outputs
Output Current
Input
Input Voltage Range:
D5A Models
D12A Models
D48A Models
Input Current
Input Filter Type
➁
Overvoltage Shutdown:
D5A Models
D12A Models
D48A Models
Reverse-Polarity Protection
On/Off (Sync.) Control
(Pin 4)
➂
V
OUT
Accuracy
(50% load):
±5V Outputs
±9/12/15V Outputs
Temperature Coefficient
Ripple/Noise
(20MHz BW)
➁
Line/Load Regulation
Efficiency
Isolation Voltage
➃
Isolation Capacitance
Current Limiting
Overvoltage Protection
Transient Response
(50% load step)
Switching Frequency
Operating Temperature
(ambient):
Without Derating
With Derating
Storage Temperature
Flammability
Dimensions
Shielding
Case Connection:
D5A and D12A Models
D48A Models
Case Material
4.7-7.5 Volts (5V nominal)
9-36 Volts (24V nominal)
18-75 Volts (48V nominal)
See Ordering Guide
Pi
10 Volts
40 Volts
80 Volts
Yes (Instantaneous, 10A maximum)
TTL high = off, low (or open) = on
12 Volts
44 Volts
88 Volts
Current must be <10A. Brief
duration only. Fusing recommended.
6.8 Volts, limited duration
15 Volts, limited duration
18 Volts, limited duration
Current limited. Max. current and
short-circuit duration are model
dependent.
–40 to +105°C
See soldering guidelines
Output
±1.5%, maximum
±1%, maximum
±0.02% per °C
See Ordering Guide
See Ordering Guide
See Ordering Guide
1500Vdc, minimum
550pF
Auto-recovery
Zener/transorb clamps, magnetic feedback
Storage Temperature
Lead Temperature
These are stress ratings. Exposure of devices to greater than 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.
TECHNICAL NOTES
Floating Outputs
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 5 and 7), with either output grounded.
The Common pin (pin 6) should be left open. Minimum 20% loading is
recommended under these conditions. The total output voltage span may be
externally trimmed as described below.
Filtering and Noise Reduction
All A-Series BWR 15-20 Watt DC/DC Converters achieve their rated ripple
and noise specifications without the use of external input/output capacitors.
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 capac-
itors should be connected between their respective output pin (pin 5 or 7) and
Common (pin 6) 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
D12A Models
D48A Models
To Reduce Output Ripple
±5V Outputs
±9/12/15V Outputs
47µF, 16V
20µF, 50V
20µF, 100V
47µF, 10V, Low ESR
22µF, 20V, Low ESR
Dynamic Characteristics
270µsec max. to ±1.5% of final value
165kHz (±15kHz)
Environmental
–40 to +50/55/60°C (Model dependent)
to +100°C (See Derating Curves)
–40 to +105°C
UL 94V-0
Physical
2" x 2" x 0.45" (51 x 51 x 11.4mm)
5-sided
Pin 2 (–V
IN
)
Pin 1 (+V
IN
)
Corrosion resistant steel with
non-conductive, epoxy-based, black
enamel finish and plastic baseplate
Gold-plated copper alloy
2.7 ounces (75.6 grams)
Pin Material
Weight
➀
These converters require a minimum 20% loading on each output 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 MPS Applications Engineering for details.
➂
Applying a voltage to the Control pin when no input power is applied to the converter can
cause permanent damage to the converter.
➃
"D48A" models have BASIC, "D5A" and "D12A" models have Functional insulation.
Devices can be screened or modified for higher guaranteed isolation voltages.
Contact MPS Applications Engineering for details.
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MDC_BWR15_20_B05
Page 3 of 6
BWR Models
15-20W, Dual Output DC/DC Converters
+OUTPUT
1
+INPUT
+
C
IN
2
–INPUT
7
–OUTPUT
–OUTPUT
COMMON
+
C
OUT
6
TRIM
5
+OUTPUT
+
C
OUT
5
6
LOAD
8
1
+INPUT
COMMON
2
–INPUT
7
20k
5-10
Turns
LOAD
Figure 2. Using External Capacitors to Reduce
Input/Output Ripple/Noise
Figure 3a. Trim Connections Using a Trimpot
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 15-20 Watt DC/DC Converters, you should use slow-blow type fuses
with values no greater than the following:
V
IN
Range
D5A
D12A
D48A
On/Off Control
The On/Off Control pin (pin 4) may be used for remote on/off operation. A
TTL logic high (+2 to +5 Volts, 250µA max.) applied to pin 4 disables the
converter. A TTL logic low (0 to +0.8 Volts, 70µA max.), or no connection,
enables the converter. Control voltages should be referenced to pin 2
(–Input). Applying a voltage to the Control pin when no input power is applied
to the converter can cause permanent damage to the converter.
Fuse Value
6A
4A
2A
1
+INPUT
TRIM
2
–INPUT
COMMON
7
–OUTPUT
8
6
LOAD
LOAD
+OUTPUT
5
Figure 3b. Fixed-Value Trim Down Resistor
Output Trimming
The total output voltage span, from +Output (pin 5) to –Output (pin 7) may
be trimmed ±5% via a single external trimpot or fixed resistor. The trimpot
should be connected as shown in Figure 3a with its wiper connected to pin 8
(Trim). A trimpot can be used to determine the value of a single fixed resistor
which should be connected as shown in Figures 3b and 3c. Connect the
resistor between pin 8 (Trim) and pin 5 (+Output) to trim "down" the output
voltages. Connect the resistor between pins 8 and 7 (–Output) to trim "up"
the output voltages. Fixed resistors should be metal-film types with absolute
TCR’s less than 100ppm/°C to ensure stability.
+OUTPUT
1
+INPUT
COMMON
TRIM
2
–INPUT
5
6
LOAD
8
LOAD
7
–OUTPUT
Figure 3c. Fixed-Value Trim Up Resistor
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MDC_BWR15_20_B05
Page 4 of 6
BWR Models
15-20W, Dual Output DC/DC Converters
C U S TO M C A PA B I L I T I E S
BWR-5/1700-D48A Radiated Emissions
EN 55022 Class B, 10 Meters
Converter Output = ±5Vdc @ ±1.6A
80
70
60
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 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.
E M I R A D I AT E D E M I S S I O N S
50
EN 55022 Class B Limit
40
30
20
10
0
Radiated Emissions
–10
–20
100
1000
Frequency (MHz)
Quality and Reliability
The A-Series are the first DC/DC Converters to emerge from MPS’s new,
company-wide approach to designing and manufacturing the most reliable
power converters available. The five-pronged program draws our Quality
Assurance function into all aspects of new-product design, development,
characterization, qualification 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 qualification 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 Accelerated Life
Testing) repeatedly during the design and early manufacturing phases to
detect potential electrical and mechanical design weaknesses
that could result in possible future field failures.
During HALT, prototype and pre-production DC/DC converters are subjected
to progressively higher stress levels induced by thermal cycling, rate of
temperature change, vibration, power cycling, product-specific stresses (such
as dc voltage variation) and combined environments. The stresses are not
meant to simulate field environments but to expose any weaknesses in a
product’s electro/mechanical design and/or assembly 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.
If you’re designing with EMC in mind, please note that all of MPS’s BWR
15-20 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. Radiated emissions plots to
FCC and CISPR 22 for model BWR-5/1700-D48A appear below.
BWR-5/1700-D48A Radiated Emissions
FCC Part 15 Class B,
3
Meters
Converter Output = ±5Vdc @ ±1.6A
80
70
60
Radiated Emissions (dBµV/M)
FCC Class B Limit
50
40
30
20
10
0
Radiated Emissions
–10
–20
100
1000
Frequency (MHz)
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MDC_BWR15_20_B05
Page 5 of 6
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