Dual Output BST Models
www.murata-ps.com
Low-Cost, High Reliability 3 Watt, DC/DC Converters
Typical units
FEATURES
PRODUCT OVERVIEW
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Lowest cost! Highest reliability!
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100% SMT-on-pcb, including magnetics
Rarely, has a Series of low-power DC/DC converters
been defined by both low cost and Murata’s quality
and reliability. Our new BST Series of dual-output
3W DC/DC’s achieves this “best-of-both-worlds”
status by implementing a proven circuit architecture
(170-200kHz flyback design) as a full, SMT-on-pcb
assembly (including surface-mount magnetics) that is
truly 100% automatically assembled. Packaged in miniature 1.25" x 0.8", DIP-like plastic packages (UL94V-0
rated) and requiring no external components, BST
Series DC/DC’s bring true component-like convenience
to designers of today’s distributed power systems.
Output voltages are ±5, ±12 or ±15 Volts. Input
voltage ranges are 4.5-9V (“D5” models), 9-18V
(“D12” models) or an ultra-wide 18-72V (“D48”
models). BST DC/DC’s are fully isolated (1000Vdc
guaranteed) and include input (pi type) and output
filters within their package. Output transient response
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100% automatically assembled
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Standard "DIP" package and pinouts
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Fully isolated, 1000Vdc guaranteed
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±5, ±12 or ±15 Volt outputs
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Choice of 3 wide-range inputs:
4.5-9 Volts
9-18 Volts
18-72 Volts
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Guaranteed efficiencies to 75%
n–40 to +75°C full-power operation
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Internal input/output filtering
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UL1950/C22.2 No. 950/IEC950-1 certified
is a quick 200µsec, while output ripple and noise are
typically 75mVp-p.
These rugged modules are fully encapsulated
with a thermally conductive potting compound that
contributes to their outstanding moisture/vibration
resistance and impressive MTBF. They operate over
the full –40 to +75°C temperature range without derating. All models have been thoroughly characterized
(electrically, mechanically and thermally), qualified
(including HALT), and EMI/EMC tested. Additionally,
they are certified to UL1950, CSA 22.2 No. 950 and
IEC950.
Murata’s BST Model 3W DC/DC’s are excellent
selections for telecom/datacom, computer and
process-control applications demanding small size,
low cost and high reliability. If required, their design
“flexibility” allows for easy modification to your
application-specific requirements.
+VOUT
+VIN
COMMON
–VOUT
–VIN
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
Typical topology is shown.
Figure 1. Simplified Schematic
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
MDC_BST 3W Models.C01 Page 1 of 4
Dual Output BST Models
Low-Cost, High Reliability 3 Watt, DC/DC Converters
Performance Specifications and Ordering Guide➀
ORDERING GUIDE SUMMARY*
Output
➀
➁
➂
➃
Models
Vout
(Volts)
Iout
(mA Max.)
BST-5/250-D12-C
BST-5/250-D48-C
BST-12/125-D12-C
BST-12/125-D48-C
BST-15/100-D12-C
BST-15/100-D48-C
BST-12/105-D5-C
BST-15/85-D5-C
±5
±5
±12
±12
±15
±15
±12
±15
±250
±250
±125
±125
±100
±100
±105
±85
Input
R/N (mV pk-pk)➁
Typ.
Max.
75
75
75
75
75
75
75
75
120
120
150
150
150
150
150
150
Regulation (Max.)
Line
Load➂
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
Vin Nom. Range
(Volts) (Volts)
12
48
12
48
12
48
5
5
9-18
18-72
9-18
18-72
9-18
18-72
4.5-9
4.5-9
Efficiency
Min.
Typ.
Iin➃
(mA)
25/267
7/69
25/329
8/81
25/329
8/81
60/690
68/689
75%
72%
74%
73%
74%
73%
71%
72%
Package
(Case,
Pinout)
78%
76%
76%
77%
76%
77%
73%
74%
C1,P2
C1,P2
C1,P2
C1,P2
C1,P2
C1,P2
C1,P2
C1,P2
Typical at TA = +25°C under nominal line voltage and full-load conditions unless otherwise noted.
Ripple/Noise (R/N) measured over a 20 MHz bandwidth.
Balanced loads, 10% to 100% load.
Nominal line voltage, no-load/full-load conditions.
*See http://www.murata.com/products/power for model-specific availability.
PAR
PAR
PART NUMBER STRUCTURE
MECHANICAL SPECIFICATIONS
1.25
(31.75)
B ST - 15 / 100 - D48 - C
0.45
(11.43)
RoHS-6 Hazardous
Substance Compliance
(does not claim EU RoHS
exemption 7b – lead in solder)
Output Configuration:
B = Bipolar
Product Series
Input Voltage Range:
D5 = 4.5-9 Volts (5V nominal)
D12 = 9-18 Volts (12V nominal)
D48
= 18-72
Volts (48V nominal)
Maximum
Output
Current
in mA from each output
Nominal Output Voltages:
±5, ±12 or ±15 Volts
STANDOFFS
0.025
(0.64)
Case C1
0.020 ±0.002 DIA.
(0.508 ±0.051)
0.600
(15.24)
0.200
(5.08)
0.15 MIN
(3.81)
0.18
(4.57)
0.100
(2.54)
PAR
3 4
TEMPERATURE DERATING
7
8
0.600
(15.24)
Output Power vs. Ambient Temperature
VIN Nominal, Natural Convection
1 2
5
0.80
(20.32)
6
3.5
BOTTOM VIEW
3
Output Power (Watts)
2.5
DIMENSIONS ARE IN INCHES (MM)
I/O Connections
2
1.5
1
0.5
0
–40
0.10
(2.54)
PLASTIC CASE WITH AN INSULATED BASE
0
15
20
25
30
35
40
45
50
55
60
65
Ambient Temperature (˚C)
70
75 80 85 90 95 100
Pin
Function P2
1
+Input
2
+Input
3
–Input
4
–Input
5
Common
6
+Output
7
Common
8
–Output
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.
www.murata-ps.com/support
MDC_BST 3W Models.C01 Page 2 of 4
Dual Output BST Models
Low-Cost, High Reliability 3 Watt, DC/DC Converters
Performance/Functional Specifications
Typical @ TA = +25°C under nominal line voltage and full-load conditions unless noted. ➀
Absolute Maximum Ratings
Input
Input Voltage Range:
"D5" Models
"D12" Models
"D48" Models
4.5-9 Volts (5V nominal)
9-18 Volts (12V nominal)
18-72 Volts (48V nominal)
Input Current
See Ordering Guide
Input Voltage:
"D5" Models
"D12" Models
"D48" Models
12 Volts
20 Volts
80 Volts
Input Reverse-Polarity Protection
Current must be
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