+INPUT
(1)
+OUTPUT
(4)
–INPUT
(2)
–OUTPUT
(6)
COMMON
(5)
PWM
CONTROLLER
REFERENCE &
ERROR AMP
OPTO
ISOLATION
ON/OFF
CONTROL
(OPTION)
(3)
Figure 1. Simplifi ed Schematic
FEATURES
For your mid-range power requirements, it’s hard to beat the combination of small packaging,
low cost, proven reliability and outstanding electrical performance
offered by the 15-17W, dual-output models of MPS’s A-Series DC/DC converters. These highly effi -
cient, 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 qualifi cation program.
The input voltage ranges of the BWR 15-17 Bipolar Series (10-18V for "D12A" models, 18-36V
for "D24A" models and 36-75V for "D48A" models) make them excellent candidates for telecom-
munication system line drivers, or distributed power architectures. Their ±5, ±12 or ±15 Volt outputs
cover virtually all standard applications.
These popular power converters are fully isolated (1500Vdc 100% tested) and display excellent
line and load regulation (±0.5% max. for line and load). They are completely I/O protected (input
overvoltage shutdown and reverse-polarity protection, output current limiting and overvoltage pro-
tection) and contain input (pi type) and output fi ltering to reduce noise.
These extremely reliable, cost-effective power converters are housed in standard 1" x 2" x
0.48" UL94V-0 rated plastic packages. They offer industry-standard pinouts and are ideally suited
for high-volume computer, telecom/datacom, instrumentation and ATE applications.
Output voltages: ±5, ±12 or ±15 Volts
Input voltage ranges:
10-18V, 18-36V or 36-75V
Small packages, 1" x 2" x 0.48"
Industry-standard pinouts
Low cost; Highly reliable
Proven SMT-on-pcb construction
Designed to meet IEC/EN/UL60950-1
safety
mark available (75V-input models)
1500Vdc isolation; 100% tested
Effi ciencies to 86%
–40 to +100°C operating temperature
Thermal protection
On/Off control
Typical topology is shown
Typical units
PRODUCT OVERVIEW
BWR Series
15-17W, Dual Output DC/DC Converters
MDC_BWR15-17W.B10 Page 1 of 9
www.murata-ps.com
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For full details go to
www.murata-ps.com/rohs
BWR-5/1500-D12A ±5 ±1500 75 100 ±0.5% ±0.5% 12 10-18 240/1.5 79% 81% C14A, P43
BWR-5/1500-D24A ±5 ±1500 75 100 ±0.5% ±0.5% 24 18-36 112/0.75 81% 83% C14A, P43
BWR-5/1500-D48A ±5 ±1500 75 100 ±0.5% ±0.5% 48 36-75 59/0.38 81% 83% C14A, P43
BWR-12/725-D12A ±12 ±725 75 100 ±0.5% ±0.5% 12 10-18 265/1.7 82% 83.5% C14A, P43
BWR-12/725-D24A ±12 ±725 75 100 ±0.5% ±0.5% 24 18-36 127/0.85 83% 85% C14A, P43
BWR-12/725-D48A ±12 ±725 75 100 ±0.5% ±0.5% 48 36-75 62/0.4 84% 86% C14A, P43
BWR-15/575-D12A ±15 ±575 75 100 ±0.5% ±0.5% 12 10-18 266/1.7 82% 84% C14A, P43
BWR-15/575-D24A ±15 ±575 75 100 ±0.5% ±0.5% 24 18-36 125/0.84 84% 86% C14A, P43
BWR-15/575-D48A ±15 ±575 75 100 ±0.5% ±0.5% 48 36-75 65/0.41 85% 87% C14A, P43
1
2
4
5
6
PLASTIC CASE
3
1.00
(25.40)
2.00
(50.80)
0.20 MIN
(5.08)
0.400
(10.16)
0.800
(20.32)
0.800
(20.32)
0.60
(15.24)
0.040 ±0.002 DIA.
(1.016 ±0.051)
BOTTOM VIEW
DIMENSION ARE IN INCHES (MM)
0.200
(5.08)
0.100
(2.54)
0.10
(2.54)
STANDOFF
0.015 (0.38)
0.465
(11.81)
Case C14A
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 step.
➃Nominal line voltage, 10% load/100% load conditions.
➄ These are not complete model numbers. Please use the part number structure when ordering.
Nominal Output Voltages:
±5, ±12 or ±15 Volts
Maximum Output Current
in mA from each output
Input Voltage Range:
D12 = 10-18 Volts (12V nominal)
D24 = 18-36 Volts (24V nominal)
D48 = 36-75 Volts (48V nominal)
Wide Range Input
Output Confi guration:
B = Bipolar
12B WR 725 D48 A-/-
A-Series
High Reliability
Performance Specifi cations and Ordering Guide ➀
IOUT
(mA)
R/N (mVp-p) ➁
Load ➂
VOUT
(Volts)
Output
Package
(Case,
Pinout)
Effi ciency
Regulation (Max.)
Line
VIN Nom.
(Volts)
Range
(Volts)
Root Model ➄
Input
IIN ➃
(mA/A)
Max.
Typ. Typ.
Min.
C
Add C or N suffi x as
desired. See below.
PART NUMBER STRUCTURE MECHANICAL SPECIFICATIONS
Part Number Suffi xes
BWR 15-17 Watt DC/DC's are designed so an On/Off Control function
with either positive polarity ("C" suffi x) or negative polarity ("N" suffi x)
can be added to the pin 3 position. Models ordered without On/Off
control (without C or N suffi x) will not have pin 3 installed.
No Suffi x Pin 3 not installed
C Positive On/Off control function (pin 3)
N Negative On/Off control function (pin 3)
I/O Connections
Pin Function P43
1 +Input
2 –Input
3 On/Off Control*
4 +Output
5 Output Return
6 –Output
* Pin is optional
-C
RoHS-6 Hazardous
Substance Compliant*
* Contact Murata Power Solutions for availability.
Some model number combinations may not be available. Please contact Murata
Power Solutions for more information.
Third Angle Projection
Dimensions are in inches (mm) shown for ref. only.
Components are shown for reference only.
Tolerances (unless otherwise specified):
.XX ± 0.02 (0.5)
.XXX ± 0.010 (0.25)
Angles ± 2˚
BWR Series
15-17W, Dual Output DC/DC Converters
MDC_BWR15-17W.B10 Page 2 of 9
www.murata-ps.com/support
Performance/Functional Specifi cations
Typical @ TA = +25°C under nominal line voltage and full-load conditions, unless noted. ➀
➀ All models are specifi ed with no external I/O capacitors.
➁ See Technical Notes/Graphs for details.
➂ Applying a voltage to the On/Off Control (pin 3) when no input power is applied to the
converter can cause permanent damage to the converter.
➃ Output noise may be further reduced with the addition of additional external output capacitors.
See Technical Notes.
➄ The On/Off Control is designed to be driven with open-coolector logic or the application of
appropriate voltage levels. Voltages may be referenced to the –Input (pin 2).
➅ Input Ripple Current is tested/specifi ed over a 5-20MHz bandwidth with an external 33µF
input capacitor and a simulated source impedance of 220µF and 12µH. See I/O Filtering, Input
Ripple Current and Output Noise for details.
Input
Input Voltage Range:
D12A Models 10-18 Volts (12V nominal)
D24A Models 18-36 Volts (24V nominal)
D48A Models 36-75 Volts (48V nominal)
Overvoltage Shutdown:
D12A Models 19-21 Volts
D24A Models 37-40 Volts
D48A Models 77-81 Volts
Start-Up Threshold: ➂
D12A Models 9.4-10 Volts
D24A Models 16.5-18 Volts
D48A Models 34-36 Volts
Undervoltage Shutdown: ➂
D12A Models 7-8.5 Volts
D24A Models 15.5-17.5 Volts
D48A Models 32.5-34.5 Volts
Input Current
Normal Operating Conditions See Ordering Guide
Standby Mode (Off, OV, UV) 5mA
Input Refl ected Ripple Current ➅ 10 mAp-p
Input Filter Type Pi
Reverse-Polarity Protection Brief duration, 5A maximum.
On/Off Control: ➃ ➄
C Models On = open or 13V- +VIN, IIN = 1mA max.
Off = 0-0.8V, IIN = 1mA max.
N Models On = 0-0.5V, IIN = 3mA max.
Off = open or 3.5- +VIN, IIN = 1mA max.
Output
VOUT Accuracy (balanced half load) ±2.0%, maximum
Minimum Load Requirement ➁ 10%
Ripple/Noise (20MHz BW) ➀ ➅ See Ordering Guide
Line/Load Regulation See Ordering Guide
Effi ciency See Ordering Guide
Isolation Voltage 1500Vdc, minimum
Isolation Capacitance 550pF
Isolation Resistance 10MΩ
Current Limit Inception (@ 98% VOUT)
±5V Models 1.9-2.5A
±12V Models 1-1.5A
±15V Models 0.85-1.2A
Short-Circuit Current
±5V Models 800mA maximum
±12V Models 700mA maximum
±15V Models 700mA maximum
Overvoltage protection Output voltage comparator
±5V Models 5.45-7.15 Volts
±12V Models 13-15.8 Volts
±15V Models 16.2-19.8 Volts
Maximum Capacitive Loading 1000µF (per output)
Temperature Coeffi cient ±0.02% per °C
Input Voltage:
Continuous:
D12A Models 23 Volts
D24A Models 42 Volts
D48A Models 81 Volts
Transient (100msec):
D12A Models 50 Volts
D24A Models 50 Volts
D48A Models 100 Volts
On/Off Control (pin 3) Max. Voltages
Referenced to –Input (pin 2)
"C" Suffi x +VIN (+18 Volts)
"N" Suffi x +7 Volts
Input Reverse-Polarity Protection Current must be <5 Amps. Brief
duration only. Fusing recommended.
Output Current Current limited. Devices can withstand
sustained output short circuits without
damage.
Case Temperature 120°C
Storage Temperature –40 to +120°C
Lead Temperature See soldering guidelines
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 Specifi cations Table is not implied.
Absolute Maximum Ratings
Dynamic Characteristics
Transient Response:
(50-100% load step to 2% VOUT) 250µsec maximum
Start-Up Time:
V
IN to VOUT 35msec
On/Off to VOUT 30msec
Switching Frequency 300kHz (±30kHz)
Environmental
MTBF Bellcore, ground fi xed, fullpower
25°C ambient, 1 million hours
Operating Temperature (ambient):
-40 to +85°C with derated power (see derating curves)
Thermal Shutdown 115°C
Storage Temperature –40 to +120°C
Flammability UL 94V-0
Physical
Dimensions 1" x 2" x 0.48" (25.4 x 50.8 x 12.19mm)
Case Material Diallyl Phthalate
Pin Material Gold-plate over copper alloy
Weight 1.19 ounces (34 grams)
Primary to Secondary Insulation Level Functional
BWR Series
15-17W, Dual Output DC/DC Converters
MDC_BWR15-17W.B10 Page 3 of 9
www.murata-ps.com/support
TECHNICAL NOTES
Input Fusing
Certain applications and/or safety agencies may require the installation of fuses
at the inputs of power conversion components. Fuses should also be used if
the possibility of sustained, non-current-limited, input-voltage polarity reversal
exists. For MPS BWR 15-17 Watt DC/DC Converters, you should use slow-blow
type fuses with values no greater than the following:
Model Fuse Value
All D12A Models 4 Amp
BWR-5/1500-D24A 2 Amp
BWR-12/725-D24A, BWR-15/575-D24A 2.5 Amp
All D48A Models 1 Amp
Start-Up Time
The VIN to VOUT start-up time is the interval of time where the input voltage
crosses the turn-on threshold point, and the fully loaded output voltage enters
and remains within its specifi ed accuracy band. Actual measured times will vary
with external output capacitance and load. The BWR 15-17W Series implements
a soft start circuit that limits the duty cycle of the PWM controller at power up,
thereby limiting the Input Inrush current.
The On/Off Control to VOUT start-up time assumes the converter has its nominal
input voltage applied but is turned off via the On/Off Control pin. The specifi cation
defi nes the interval between the time at which the converter is turned on and the
fully loaded output voltage enters and remains within its specifi ed accuracy band.
Similar to the VIN to VOUT start-up, the On/Off Control to VOUT start-up time is also
governed by the internal soft start circuitry and external load capacitance.
Input Overvoltage/Undervoltage Shutdown and Start-Up Threshold
Under normal start-up conditions, devices will not begin to regulate until the ramping-up
input voltage exceeds the Start-Up Threshold Voltage (35V for D48 models). Once
operating, devices will not turn off until the input voltage drops below the Undervoltage
Shutdown limit (33.5V for D48 models). Subsequent re-start will not occur until the input is
brought back up to the Start-Up Threshold. This built in hysteresis prevents any unstable
on/off situations from occurring at a single input voltage.
Input voltages exceeding the input overvoltage shutdown specifi cation listed in
the Performance/Functional Specifi cations will cause the device to shutdown. A
built-in hysteresis of 0.6 to 1.6 Volts for all models will not allow the converter to
restart until the input voltage is suffi ciently reduced.
Input Source Impedance
The converters must be driven from a low ac-impedance input source. The DC/
DC's performance and stability can be compromised by the use of highly induc-
tive source impedances. The input circuit shown in Figure 2 is a practical solu-
tion that can be used to minimize the effects of inductance in the input traces.
For optimum performance, components should be mounted close to the DC/DC
converter. If the application has a high source impedance, low VIN models can
benefi t of increased external input capacitance.
I/O Filtering, Input Ripple Current, and Noise Reduction
All BWR 15-17W 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 installing
additional external I/O caps.
Figure 2. Measuring Input Ripple Current
CINVIN CBUS
LBUS
CIN = 33µF, ESR < 700m7 @ 100kHz
CBUS = 220µF, ESR < 100m7 @ 100kHz
LBUS = 12µH
+INPUT
–INPUT
CURRENT
PROBE
TO
OSCILLOSCOPE
+
–
External input capacitors (CIN in Figure 2) serve primarily as energy-storage
elements, minimizing line voltage variations caused by transient IR drops in
conductors from backplane to the DC/DC. Input caps should be selected for
bulk capacitance (at appropriate frequencies), low ESR, and high rms-ripple-
current ratings. The switching nature of DC/DC converters requires that dc
voltage sources have low ac impedance as highly inductive source imped-
ance can affect system stability. In Figure 2, CBUS and LBUS simulate a typical
dc voltage bus. Your specifi c system confi guration may necessitate additional
considerations.
In critical applications, output ripple/noise (also referred to as periodic and
random deviations or PARD) may be reduced below specifi ed limits using fi lter-
ing techniques, the simplest of which is the installation of additional external
output capacitors. These output caps function as true fi lter elements and
should be selected for bulk capacitance, low ESR and appropriate frequency
response. All external capacitors should have appropriate voltage ratings and
be located as close to the converter as possible. Temperature variations for all
relevant parameters should also be taken carefully into consideration. The most
effective combination of external I/O capacitors will be a function of line voltage
and source impedance, as well as particular load and layout conditions.
Floating Outputs
Since these are isolated DC/DC converters, their outputs are "fl oating," with
respect to the input. As such, it is possible to use +Output, –Output or Output
Return as the system ground thereby allowing the fl exibility to generate a
variety of output voltage combinations.
Regulation for BWR 15-17W bipolar converters is monitored between
–Output and +Output (as opposed to Output to Return).
Minimum Loading Requirements
BWR 15-17W converters employ a classical diode-rectifi cation design topology
and require a minimum 10% loading to achieve their listed regulation specifi ca-
tions and a stable operating condition.
Load Regulation
Regulation for the BWR 15-17W bipolar converters is monitored between
–Output and +Output (as opposed to Output to Return). As such regulation will
assure that voltage between –Output and +Output pins remains within the VOUT
accuracy listed in the Performance/Functional Specifi cations table.
BWR Series
15-17W, Dual Output DC/DC Converters
MDC_BWR15-17W.B10 Page 4 of 9
www.murata-ps.com/support
On/Off Control
The input-side, remote On/Off Control function (pin 3) can be ordered to operate
with either polarity. Positive-polarity devices ("C" suffi x) are enabled when pin
3 is left open (or is pulled high, +13V to VIN applied with respect to –Input, pin
2, see Figure 2). Positive-polarity devices are disabled when pin 3 is pulled low
(0-0.8V with respect to –Input). Negative-polarity devices are off when pin 3 is
left open (or pulled high, 3.5V to VIN), and on when pin 3 is pulled low (0-0.5V).
See Figure 5.
Dynamic control of the remote on/off function is best accomplished with a
mechanical relay or an open-collector/open-drain drive circuit (optically isolated
if appropriate). The drive circuit should be able to sink appropriate current (see
Performance Specs) when activated and withstand appropriate voltage when
deactivated.
Applying an external voltage to pin 3 when no input power is applied to the
converter can cause permanent damage to the converter.
3
2
1+INPUT
13V CIRCUIT
5V CIRCUIT
–INPUT
ON/OFF
CONTROL
Figure 4. Driving the Positive Polarity On/Off Control Pin
Figure 5. Driving the Negative Polarity On/Off Control Pin
Start-Up Time
The VIN to VOUT start-up time is the interval of time where the input voltage crosses
the turn-on threshold point, and the fully loaded output voltage enters and remains
within its specifi ed accuracy band. Actual measured times will vary with external
output capacitance and load. The BWR 15-17W Series implements a soft start
circuit that limits the duty cycle of the PWM controller at power up, thereby limiting
the Input Inrush current.
The On/Off Control to VOUT start-up time assumes the converter has its nominal
input voltage applied but is turned off via the On/Off Control pin. The specifi cation
defi nes the interval between the time at which the converter is turned on and the
fully loaded output voltage enters and remains within its specifi ed accuracy band.
Similar to the VIN to VOUT start-up, the On/Off Control to VOUT start-up time is also
governed by the internal soft start circuitry and external load capacitance.
If loading from +/– Outputs to Output Return is symmetrical, the voltage at
Output pins with respect to Output Return will also be symmetrical. An unbal-
ance in loading will consequently result in a degraded VOUT regulation accuracy
from +/– Outputs to Output Return ( –Output to +Output regulation will still be
within specifi cation) with a load step from minimum to maximum load and with
the other output at full load, the maximum deviation is 2.5% VOUT nominal.
3
2
1+INPUT
–INPUT
ON/OFF
CONTROL
15.5
15.4
15.3
15.2
15.1
15
14.9
14.8
14.7
BWR-15/575-D48A Unbalanced Output Load Regulation
Output Load Regulation (%)
+/–15VOUT
0 102030 4050 60708090 100
+15V @ 0A to 0.575A
–15V @ 0.575A
–15V @ 0A to 0.575A
+15V @ 0.575A
Current Limiting
When output current increases to approximately 15% to 50% above the rated
output current, the DC/DC converter will go into a current limiting mode. In
this condition the output voltage will decrease proportionately with increases
in output current, thereby maintaining a somewhat constant power dissipa-
tion. This is commonly referred to as power limiting. Current limit inception
is defi ned as the point where the full-power output voltage falls below the
specifi ed tolerance. See Performance/Functional Specifi cations. If the load
current being drawn from the converter is signifi cant enough, the unit will go
into a short circuit condition. See "Short Circuit Condition."
Short Circuit Condition
When a converter is in current limit mode the output voltages will drop as
the output current demand increases. If the output voltage drops too low, the
magnetically coupled voltage used to develop primary side voltages will also
drop, thereby shutting down the PWM controller.
Following a time-out period, the PWM will restart, causing the output voltages
to begin ramping to their appropriate values. If the short-circuit condition
persists, another shutdown cycle will be initiated. This on/off cycling is
referred to as "hiccup" mode. The hiccup cycling reduces the average output
current, thereby preventing internal temperatures from rising to excessive
levels. The BWR 15-17W Series is capable of enduring an indefi nite short
circuit output condition.
Thermal Shutdown
These BWR converters are equipped with Thermal Shutdown Circuitry. If
environmental conditions cause the internal temperature of the DC/DC con-
verter rises above the designed operating temperature, a precision tempera-
ture sensor will power down the unit. When the internal temperature decreases
below the threshold of the temperature sensor the unit will self start.
Figure 4. Output Voltage Accuracy vs. Imbalanced Loading
BWR Series
15-17W, Dual Output DC/DC Converters
MDC_BWR15-17W.B10 Page 5 of 9
www.murata-ps.com/support
Typical Performance Curves
Output Power (Watts)
Ambient Temperature (°C)
–400 4050 60 70 80 901
00
16
14
12
10
8
6
4
2
0
VIN = 18V
VIN = 36V
VIN = 24V
BWR-5/1500-D24A
Output Power vs. Ambient Temperature
(No air flow)
Output Power (Watts)
Ambient Temperature (°C)
–400 4050 607080 901
00
16
14
12
10
8
6
4
2
0
VIN = 36V
VIN = 75V
VIN = 48V
BWR-5/1500-D48A
Output Power vs. Ambient Temperature
(No air flow)
Output Power (Watts)
Ambient Temperature (°C)
–40 0 40 50 607080 901
00
16
14
12
10
8
6
4
2
0
VIN = 10V
VIN = 18V
VIN = 12V
BWR-5/1500-D12A
Output Power vs. Ambient Temperature
(No air flow)
85
80
75
70
65
60
55
50
BWR-5/1500-D48A Efficiency vs. Input Line And Output Load
Output Current (%)
Efficiency (%)
10 20 30 40 50 60 70 80 90 100
V
IN
= 75V
V
IN
= 36V
V
IN
= 48V
85
80
75
70
65
60
55
50
BWR-5/1500-D24A Efficiency vs. Input Line And Output Load
Output Current (%)
Efficiency (%)
10 20 30 40 50 60 70 80 90 100
V
IN
= 36V
V
IN
= 18V
V
IN
= 24V
85
80
75
70
65
60
55
50
BWR-5/1500-D12A Efficiency vs. Input Line And Output Load
Output Current (%)
Efficiency (%)
10 20 30 40 50 60 70 80 90 100
V
IN
= 18V
V
IN
= 10V
V
IN
= 12V
BWR Series
15-17W, Dual Output DC/DC Converters
MDC_BWR15-17W.B10 Page 6 of 9
www.murata-ps.com/support
Typical Performance Curves
Output Power (Watts)
AmbientTemperature (°C)
–40 0 40 506070 80901
00
18
16
14
12
10
8
6
4
2
0
VIN = 18V
VIN =36V
VIN = 24V
BWR-12/725-D24A
Output Power vs. AmbientTemperature
(No air flow)
Output Power (Watts)
Ambient Temperature (°C)
–40040 50 607080 901
00
18
16
14
12
10
8
6
4
2
0
VIN = 36-75V No Air Flow
VIN = 48V No Air Flow
VIN = 48V 150 lfm Air Flow
VIN = 36-75V 150 lfm Air Flow
BWR-12/725-D48A
Output Power vs. Ambient Temperature
(Air flow from Input ot Output)
Output Power (Watts)
AmbientTemperature (°C)
–40 0 40 50 60 70 80901
00
18
16
14
12
10
8
6
4
2
0
VIN = 10V
VIN = 18V
VIN = 12V
BWR-12/725-D12A
Output Power vs. AmbientTemperature
(No air flow)
85
80
75
70
65
60
55
50
BWR-12/725-D12A Efficiency vs. Input Line And Output Load
Output Current (%)
Efficiency (%)
10 20 30 40 50 60 70 80 90 100
V
IN
= 18V
V
IN
= 10V
V
IN
= 12V
90
85
80
75
70
65
60
55
BWR-12/725-D48A Efficiency vs. Input Line And Output Load
Output Current (%)
Efficiency (%)
10 20 30 40 50 60 70 80 90 100
V
IN
= 75V
V
IN
= 36V
V
IN
= 48V
90
85
80
75
70
65
60
55
BWR-12/725-D24A Efficiency vs. Input Line And Output Load
Output Current (%)
Efficiency (%)
10 20 30 40 50 60 70 80 90 100
V
IN
= 36V
V
IN
= 18V
V
IN
= 24V
BWR Series
15-17W, Dual Output DC/DC Converters
MDC_BWR15-17W.B10 Page 7 of 9
www.murata-ps.com/support
Typical Performance Curves
Output Power (Watts)
Ambient Temperature (°C)
–40 04050 607080901
00
18
16
14
12
10
8
6
4
2
0
VIN = 10V
VIN = 18V
VIN = 12V
BWR-15/575-D12A
Output Power vs. Ambient Temperature
(No air flow)
Output Power (Watts)
Ambient Temperature (°C)
–400 4050 60 70 80 901
00
18
16
14
12
10
8
6
4
2
0
VIN = 18V
VIN = 36V
VIN = 24V
BWR-15/575-D24A
Output Power vs. Ambient Temperature
(No air flow)
Output Power (Watts)
Ambient Temperature (°C)
–400 4050 607080 901
00
18
16
14
12
10
8
6
4
2
0
VIN = 36V
VIN = 75V
VIN = 48V
BWR-15/575-D48A
Output Power vs. Ambient Temperature
(No air flow)
90
85
80
75
70
65
60
55
BWR-15/575-D48A Efficiency vs. Input Line And Output Load
Output Current (%)
Efficiency (%)
10 20 30 40 50 60 70 80 90 100
V
IN
= 75V
V
IN
= 36V
V
IN
= 48V
90
85
80
75
70
65
60
55
BWR-15/575-D24A Efficiency vs. Input Line And Output Load
Output Current (%)
Efficiency (%)
10 20 30 40 50 60 70 80 90 100
V
IN
= 36V
V
IN
= 18V
V
IN
= 24V
85
80
75
70
65
60
55
50
BWR-15/575-D12A Efficiency vs. Input Line And Output Load
Output Current (%)
Efficiency (%)
10 20 30 40 50 60 70 80 90 100
V
IN
= 18V
V
IN
= 10V
V
IN
= 12V
BWR Series
15-17W, Dual Output DC/DC Converters
MDC_BWR15-17W.B10 Page 8 of 9
www.murata-ps.com/support
Start-Up from On/Off to VOUT
(VIN = 48V to Full Load)
10msec/div
Control
Pin
5V/div
VOUT
5V/div
–VOUT
+VOUT
Start-Up from VIN to VOUT
(VIN = 48V to Full Load)
10msec/div
VIN
50V/div
VOUT
5V/div
–VOUT
+VOUT
Typical Performance Curves
Adaptations
Several different additional converter confi gurations are available. Generally,
these are modifi cations of an existing standard product. In some cases, they
are designated with an additional 5-digit suffi x on the end of the root parent
standard model number. The actual details of the modifi cation are contained
in a Specifi cation Control Drawing maintained by MPS and tracked using
this same 5-digit special number suffi x. These adapted products are
normally built in the same production facilities and to the same quality stan-
dards as catalog products. Usually, they share the same components.
Once a modifi ed product has been confi gured and supplied to a customer,
it may be available as a “standard” product to other customers, assuming
there is no proprietary status or other restriction. There may be scheduling
and minimum order requirements for such products. Contact Murata Power
Solutions directly if you are interested in your own set of adaptations or
modifi cations.
Soldering Guidelines
Murata Power Solutions recommends the specifi cations below when installing
these converters. These specifi cations vary depending on the solder type. Exceeding
these specifi cations may cause damage to the product. Be cautious when there is
high atmospheric humidity. We strongly recommend a mild pre-bake (100° C. for
30 minutes). Your production environment may differ; therefore please thoroughly
review these guidelines with your process engineers.
Wave Solder Operations for through-hole mounted products
(THMT)
For Sn/Ag/Cu based solders:
Maximum Preheat Temperature 115° C.
Maximum Pot Temperature 270° C.
Maximum Solder Dwell Time 7 seconds
For Sn/Pb based solders:
Maximum Preheat Temperature 105° C.
Maximum Pot Temperature 250° C.
Maximum Solder Dwell Time 6 seconds
BWR Series
15-17W, Dual Output DC/DC Converters
MDC_BWR15-17W.B10 Page 9 of 9
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. © 2012 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/
