BWR Series
www.murata-ps.com
15-17W, Dual Output DC/DC Converters
Typical units
FEATURES
PRODUCT OVERVIEW
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
Efficiencies to 86%
–40 to +100°C operating temperature
Thermal protection
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 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.
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 telecommunication 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 protection) and contain input (pi type) and output filtering 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.
On/Off control
+OUTPUT
(4)
+INPUT
(1)
COMMON
(5)
–OUTPUT
(6)
–INPUT
(2)
ON/OFF
CONTROL
(OPTION)
(3)
PWM
CONTROLLER
OPTO
ISOLATION
Figure 1. Simplified Schematic
REFERENCE &
ERROR AMP
Typical topology is shown
For full details go to
www.murata-ps.com/rohs
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MDC_BWR15-17W.D01 Page 1 of 9
BWR Series
15-17W, Dual Output DC/DC Converters
Performance Specifications and Ordering Guide
➀
Output
R/N (mVp-p) ➁
Typ.
Max.
Regulation (Max.)
Line
Load ➂
±1500
75
100
±0.5%
±1500
75
100
±0.5%
±5
±1500
75
100
BWR-12/725-D12A-C
±12
±725
75
BWR-12/725-D24A-C
±12
±725
75
BWR-12/725-D48A-C
±12
±725
BWR-15/575-D12A-C
±15
BWR-15/575-D24A-C
±15
BWR-15/575-D48A-C
±15
IIN ➃
(mA/A)
Efficiency
Min.
Typ.
Package
(Case,
Pinout)
VIN Nom.
(Volts)
Range
(Volts)
±0.5%
12
10-18
240/1.5
79%
81%
±0.5%
24
18-36
112/0.75
81%
83%
C14A, P43
±0.5%
±0.5%
48
36-75
59/0.38
81%
83%
C14A, P43
100
±0.5%
±0.5%
12
10-18
265/1.7
82%
83.5%
C14A, P43
100
±0.5%
±0.5%
24
18-36
127/0.85
83%
85%
C14A, P43
75
100
±0.5%
±0.5%
48
36-75
62/0.4
84%
86%
C14A, P43
±575
75
100
±0.5%
±0.5%
12
10-18
266/1.7
82%
84%
C14A, P43
±575
75
100
±0.5%
±0.5%
24
18-36
125/0.84
84%
86%
C14A, P43
±575
75
100
±0.5%
±0.5%
48
36-75
65/0.41
85%
87%
C14A, P43
VOUT
(Volts)
IOUT
(mA)
BWR-5/1500-D12A-C
±5
BWR-5/1500-D24A-C
±5
BWR-5/1500-D48A-C
Root Model ➄
➀
➁
➂
➃
➄
Input
C14A, P43
Typical at TA = +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 step.
Nominal line voltage, 10% load/100% load conditions.
These are not complete model numbers. Please use the part number structure when ordering.
P A R T
N U M B E R
S T R U C T U R E
M E C H A N I C A L
S P E C I F I C A T I O N S
B WR - 12 / 725 - D48 A - C
2.00
(50.80)
PLASTIC CASE
Output Configuration:
B = Bipolar
RoHS-6 Hazardous
Substance Compliant*
0.465
(11.81)
Case C14A
Wide Range Input
Nominal Output Voltages:
±5, ±12 or ±15 Volts
Maximum Output Current
in mA from each output
STANDOFF
0.015 (0.38)
A-Series
High Reliability
Input Voltage Range:
D12 = 10-18 Volts (12V nominal)
D24 = 18-36 Volts (24V nominal)
D48 = 36-75 Volts (48V nominal)
0.040 ±0.002 DIA.
(1.016 ±0.051)
0.20 MIN
(5.08)
5
C
Positive On/Off control function (pin 3)
N
Negative On/Off control function (pin 3)
* Contact Murata Power Solutions for availability.
Some model number combinations may not be available. Please contact Murata
Power Solutions for more information.
0.800
(20.32)
2
0.400
(10.16)
6
3
Part Number Suffixes
No Suffix Pin 3 not installed
0.100
(2.54)
4
1
1.00
(25.40)
BWR 15-17 Watt DC/DC's are designed so an On/Off Control function
with either positive polarity ("C" suffix) or negative polarity ("N" suffix)
can be added to the pin 3 position. Models ordered without On/Off
control (without C or N suffix) will not have pin 3 installed.
0.60
(15.24)
0.800
(20.32)
BOTTOM VIEW
0.200
(5.08)
DIMENSION ARE IN INCHES (MM)
I/O Connections
Pin Function P43
1
+Input
2
–Input
3 On/Off Control*
4
+Output
5
Output Return
6
–Output
* Pin is optional
0.10
(2.54)
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.
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MDC_BWR15-17W.D01 Page 2 of 9
BWR Series
15-17W, Dual Output DC/DC Converters
Performance/Functional Specifications
Typical @ TA = +25°C under nominal line voltage and full-load conditions, unless noted. ➀
Input
Input Voltage Range:
D12A Models
D24A Models
D48A Models
10-18 Volts (12V nominal)
18-36 Volts (24V nominal)
36-75 Volts (48V nominal)
19-21 Volts
37-40 Volts
77-81 Volts
Start-Up Threshold: ➂
D12A Models
D24A Models
D48A Models
9.4-10 Volts
16.5-18 Volts
34-36 Volts
7-8.5 Volts
15.5-17.5 Volts
32.5-34.5 Volts
35msec
30msec
Switching Frequency
300kHz (±30kHz)
MTBF
Bellcore, ground fixed, 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
1" x 2" x 0.48" (25.4 x 50.8 x 12.19mm)
Case Material
Diallyl Phthalate
Gold-plate over copper alloy
Weight
1.19 ounces (34 grams)
Primary to Secondary Insulation Level Functional
10 mAp-p
Pi
Reverse-Polarity Protection
Brief duration, 5A maximum.
On = open or 13V- +VIN, IIN = 1mA max.
Off = 0-0.8V, IIN = 1mA max.
On = 0-0.5V, IIN = 3mA max.
Off = open or 3.5- +VIN, IIN = 1mA max.
N Models
Dimensions
See Ordering Guide
5mA
Input Reflected Ripple Current ➅
On/Off Control: ➃ ➄
C Models
UL 94V-0
Physical
Pin Material
Input Filter Type
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
Efficiency
See Ordering Guide
Isolation Voltage
1500Vdc, minimum
Isolation Capacitance
550pF
Isolation Resistance
10MΩ
Current Limit Inception (@ 98% VOUT)
±5V Models
±12V Models
±15V Models
1.9-2.5A
1-1.5A
0.85-1.2A
Short-Circuit Current
±5V Models
±12V Models
±15V Models
800mA maximum
700mA maximum
700mA maximum
Overvoltage protection
±5V Models
±12V Models
±15V Models
Output voltage comparator
5.45-7.15 Volts
13-15.8 Volts
16.2-19.8 Volts
Temperature Coefficient
250µsec maximum
Start-Up Time:
VIN to VOUT
On/Off to VOUT
Flammability
Undervoltage Shutdown: ➂
D12A Models
D24A Models
D48A Models
Maximum Capacitive Loading
Transient Response:
(50-100% load step to 2% VOUT)
Environmental
Overvoltage Shutdown:
D12A Models
D24A Models
D48A Models
Input Current
Normal Operating Conditions
Standby Mode (Off, OV, UV)
Dynamic Characteristics
1000µF (per output)
±0.02% per °C
➀ All models are specified 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/specified 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.
Absolute Maximum Ratings
Input Voltage:
Continuous:
D12A Models
D24A Models
D48A Models
Transient (100msec):
D12A Models
D24A Models
D48A Models
On/Off Control (pin 3) Max. Voltages
Referenced to –Input (pin 2)
"C" Suffix
"N" Suffix
23 Volts
42 Volts
81 Volts
50 Volts
50 Volts
100 Volts
+VIN (+18 Volts)
+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 Specifications Table is not implied.
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MDC_BWR15-17W.D01 Page 3 of 9
BWR Series
15-17W, Dual Output DC/DC Converters
T E C H N I C A L
N O T E S
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
All D12A Models
BWR-5/1500-D24A
BWR-12/725-D24A, BWR-15/575-D24A
All D48A Models
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-ripplecurrent ratings. The switching nature of DC/DC converters requires that dc
voltage sources have low ac impedance as highly inductive source impedance can affect system stability. In Figure 2, CBUS and LBUS simulate a typical
dc voltage bus. Your specific system configuration may necessitate additional
considerations.
Fuse Value
4 Amp
2 Amp
2.5 Amp
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 specified 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 specification
defines the interval between the time at which the converter is turned on and the
fully loaded output voltage enters and remains within its specified 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 specification listed in
the Performance/Functional Specifications 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 sufficiently reduced.
TO
OSCILLOSCOPE
CURRENT
PROBE
+INPUT
LBUS
+
VIN
CBUS
CIN
–
–INPUT
CIN = 33µF, ESR < 700m7 @ 100kHz
CBUS = 220µF, ESR < 100m7 @ 100kHz
LBUS = 12µH
Figure 2. Measuring Input Ripple Current
In critical applications, output ripple/noise (also referred to as periodic and
random deviations or PARD) may be reduced below specified limits using filtering techniques, the simplest of which is the installation of additional external
output capacitors. These output caps function as true filter 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 "floating," with
respect to the input. As such, it is possible to use +Output, –Output or Output
Return as the system ground thereby allowing the flexibility 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
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 inductive source impedances. The input circuit shown in Figure 2 is a practical solution 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
benefit of increased external input capacitance.
I/O Filtering, Input Ripple Current, and Noise Reduction
BWR 15-17W converters employ a classical diode-rectification design topology
and require a minimum 10% loading to achieve their listed regulation specifications 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 Specifications table.
All BWR 15-17W 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
additional external I/O caps.
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MDC_BWR15-17W.D01 Page 4 of 9
BWR Series
15-17W, Dual Output DC/DC Converters
If loading from +/– Outputs to Output Return is symmetrical, the voltage at
Output pins with respect to Output Return will also be symmetrical. An unbalance in loading will consequently result in a degraded VOUT regulation accuracy
from +/– Outputs to Output Return ( –Output to +Output regulation will still be
within specification) 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.
BWR-15/575-D48A Unbalanced Output Load Regulation
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 specified 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.
15.2
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 specification
defines the interval between the time at which the converter is turned on and the
fully loaded output voltage enters and remains within its specified 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.
15.1
On/Off Control
15.5
15.4
+15V @ 0A to 0.575A
–15V @ 0.575A
15.3
+/–15VOUT
Start-Up Time
15
–15V @ 0A to 0.575A
+15V @ 0.575A
14.9
14.8
14.7
0
10
20
30
40
50
60
70
80
90
100
The input-side, remote On/Off Control function (pin 3) can be ordered to operate
with either polarity. Positive-polarity devices ("C" suffix) 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.
Output Load Regulation (%)
1
+INPUT
Figure 4. Output Voltage Accuracy vs. Imbalanced Loading
Current Limiting
13V CIRCUIT
3
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 dissipation. This is commonly referred to as power limiting. Current limit inception
is defined as the point where the full-power output voltage falls below the
specified tolerance. See Performance/Functional Specifications. If the load
current being drawn from the converter is significant enough, the unit will go
into a short circuit condition. See "Short Circuit Condition."
ON/OFF
CONTROL
2
1
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.
3
Thermal Shutdown
These BWR converters are equipped with Thermal Shutdown Circuitry. If
environmental conditions cause the internal temperature of the DC/DC converter rises above the designed operating temperature, a precision temperature sensor will power down the unit. When the internal temperature decreases
below the threshold of the temperature sensor the unit will self start.
–INPUT
Figure 4. Driving the Positive Polarity On/Off Control Pin
Short Circuit Condition
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 indefinite short
circuit output condition.
5V CIRCUIT
+INPUT
ON/OFF
CONTROL
2
–INPUT
Figure 5. Driving the Negative Polarity On/Off Control Pin
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.
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MDC_BWR15-17W.D01 Page 5 of 9
BWR Series
15-17W, Dual Output DC/DC Converters
Typical Performance Curves
BWR-5/1500-D12A Efficiency vs. Input Line And Output Load
BWR-5/1500-D12A
Output Power vs. Ambient Temperature
(No air flow)
85
16
80
14
12
Output Power (Watts)
Efficiency (%)
75
70
VIN = 10V
65
VIN = 12V
60
VIN = 10V
10
8
VIN = 12V
6
4
55
VIN = 18V
2
VIN = 18V
0
–40
50
10
20
30
40
50
60
70
80
90
0
50
40
100
70
60
80
90
100
80
90
100
80
90
100
Ambient Temperature (°C)
Output Current (%)
BWR-5/1500-D24A Efficiency vs. Input Line And Output Load
BWR-5/1500-D24A
Output Power vs. Ambient Temperature
(No air flow)
85
16
80
14
12
Output Power (Watts)
Efficiency (%)
75
70
VIN = 18V
65
VIN = 24V
60
VIN = 18V
10
VIN = 24V
8
6
VIN = 36V
4
55
2
VIN = 36V
0
–40
50
10
20
30
40
50
60
70
80
90
0
50
40
100
70
60
Ambient Temperature (°C)
Output Current (%)
BWR-5/1500-D48A Efficiency vs. Input Line And Output Load
BWR-5/1500-D48A
Output Power vs. Ambient Temperature
(No air flow)
85
16
80
14
12
Output Power (Watts)
Efficiency (%)
75
70
VIN = 36V
65
VIN = 48V
60
VIN = 36V
10
VIN = 48V
8
6
VIN = 75V
4
55
2
VIN = 75V
0
–40
50
10
20
30
40
50
60
Output Current (%)
70
80
90
100
0
40
50
60
70
Ambient Temperature (°C)
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MDC_BWR15-17W.D01 Page 6 of 9
BWR Series
15-17W, Dual Output DC/DC Converters
Typical Performance Curves
BWR-12/725-D12A Efficiency vs. Input Line And Output Load
BWR-12/725-D12A
Output Power vs. Ambient Temperature
(No air flow)
85
18
80
16
14
Output Power (Watts)
Efficiency (%)
75
70
VIN = 10V
65
VIN = 12V
60
12
VIN = 10V
10
VIN = 12V
8
6
4
55
VIN = 18V
2
VIN = 18V
0
–40
50
10
20
30
40
50
60
70
80
90
0
50
40
100
70
60
80
90
100
80
90
100
80
90
100
Ambient Temperature (°C)
Output Current (%)
BWR-12/725-D24A Efficiency vs. Input Line And Output Load
BWR-12/725-D24A
Output Power vs. Ambient Temperature
(No air flow)
90
18
85
16
14
Output Power (Watts)
Efficiency (%)
80
75
VIN = 18V
70
VIN = 24V
65
VIN = 18V
12
10
VIN = 24V
8
6
VIN = 36V
4
60
2
VIN = 36V
0
–40
55
10
20
30
40
50
60
70
80
90
0
40
100
50
70
60
Ambient Temperature (°C)
Output Current (%)
BWR-12/725-D48A Efficiency vs. Input Line And Output Load
BWR-12/725-D48A
Output Power vs. Ambient Temperature
(Air flow from Input ot Output)
90
18
85
16
14
Output Power (Watts)
Efficiency (%)
80
75
VIN = 36V
70
VIN = 48V
65
VIN = 36-75V No Air Flow
12
VIN = 36-75V 150 lfm Air Flow
10
8
VIN = 48V No Air Flow
6
VIN = 48V 150 lfm Air Flow
4
60
2
VIN = 75V
0
–40
55
10
20
30
40
50
60
Output Current (%)
70
80
90
100
0
40
50
60
70
Ambient Temperature (°C)
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MDC_BWR15-17W.D01 Page 7 of 9
BWR Series
15-17W, Dual Output DC/DC Converters
Typical Performance Curves
BWR-15/575-D12A Efficiency vs. Input Line And Output Load
BWR-15/575-D12A
Output Power vs. Ambient Temperature
(No air flow)
85
18
80
16
14
Output Power (Watts)
Efficiency (%)
75
70
VIN = 10V
65
VIN = 12V
60
VIN = 10V
12
10
VIN = 12V
8
6
VIN = 18V
4
55
2
VIN = 18V
0
–40
50
10
20
30
40
50
60
70
80
90
0
40
100
70
60
50
80
90
100
80
90
100
80
90
100
Ambient Temperature (°C)
Output Current (%)
BWR-15/575-D24A Efficiency vs. Input Line And Output Load
BWR-15/575-D24A
Output Power vs. Ambient Temperature
(No air flow)
90
18
85
16
14
Output Power (Watts)
Efficiency (%)
80
75
VIN = 18V
70
VIN = 24V
65
VIN = 18V
12
10
VIN = 24V
8
6
VIN = 36V
4
60
2
VIN = 36V
0
–40
55
10
20
30
40
50
60
70
80
90
0
40
100
70
60
50
Ambient Temperature (°C)
Output Current (%)
BWR-15/575-D48A Efficiency vs. Input Line And Output Load
BWR-15/575-D48A
Output Power vs. Ambient Temperature
(No air flow)
90
18
85
16
14
Output Power (Watts)
Efficiency (%)
80
75
VIN = 36V
70
VIN = 48V
65
12
VIN = 36V
10
VIN = 48V
8
6
4
60
2
VIN = 75V
0
–40
55
10
20
30
40
VIN = 75V
50
60
Output Current (%)
70
80
90
100
0
40
50
60
70
Ambient Temperature (°C)
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MDC_BWR15-17W.D01 Page 8 of 9
BWR Series
15-17W, Dual Output DC/DC Converters
Typical Performance Curves
Start-Up from VIN to VOUT
(VIN = 48V to Full Load)
Start-Up from On/Off to VOUT
(VIN = 48V to Full Load)
VIN
50V/div
Control
Pin
5V/div
–VOUT
–VOUT
VOUT
5V/div
VOUT
5V/div
+VOUT
+VOUT
10msec/div
10msec/div
Adaptations
Soldering Guidelines
Several different additional converter configurations are available. Generally,
these are modifications of an existing standard product. In some cases, they
are designated with an additional 5-digit suffix on the end of the root parent
standard model number. The actual details of the modification are contained
in a Specification Control Drawing maintained by MPS and tracked using
this same 5-digit special number suffix. These adapted products are
normally built in the same production facilities and to the same quality standards as catalog products. Usually, they share the same components.
Murata Power Solutions recommends the specifications below when installing
these converters. These specifications vary depending on the solder type. Exceeding
these specifications 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.
Once a modified product has been configured 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
modifications.
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
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
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.
© 2014 Murata Power Solutions, Inc.
www.murata-ps.com/support
MDC_BWR15-17W.D01 Page 9 of 9