®
®
A SUBSIDIARY OF C&D TECHNOLOGIES
Dual Output
BST Models
Low-Cost, High-Reliability
3 Watt, DC/DC Converters
Features
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Lowest cost! Highest reliability!
100% SMT-on-pcb, including magnetics
100% automatically assembled
Standard "DIP" package and pinouts
Fully isolated, 1000Vdc guaranteed
±5, ±12 or ±15 Volt outputs
Choice of 3 wide-range inputs:
4.5-9 Volts
9-18 Volts
18-72 Volts
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Guaranteed efficiencies to 75%
–40 to +75°C full-power operation
Internal input/output filtering
UL1950/C22.2 No. 950/IEC950 certified
Modifications and customs for OEM’s
Rarely, has a Series of low-power DC/DC converters been defined by both low
cost and DATEL's made-in-the-USA quality and reliability. Our new BST Series of
dual-output 3W DC/DC’s achieves this "best-of-both-worlds" status by implement-
ing 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 com-
ponent-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 is a quick 200µsec,
while output ripple and noise are typically 75mVp-p.
These rugged modules are fully encapsulated with a thermally conductive pot-
ting 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, me-
chanically and thermally), qualified (including HALT), and EMI/EMC tested. Addition-
ally, they are certified to UL1950, CSA 22.2 No. 950 and IEC950.
DATEL’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 ap-
plication-specific requirements.
½½
½½
½½
½½½
½½½½½½
½½
½½
½½½
½½½½½½½½½½
½½½½½
½½½½½½½½½
½½½½½½½½½½½½
½½½½½½½½½½
Figure 1. Simplified Schematic
DATEL, Inc., Mansfield, MA 02048 (USA)
•
Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356
•
Email: sales@datel.com
•
Internet: www.datel.com
XST Series
3 W, D UA L O U T P U T D C / D C C O N V E R T E R S
Performance Specifications and Ordering Guide
Output
Model
BST-5/250-D12
BST-5/250-D48
BST-12/105-D5
BST-12/125-D12
BST-12/125-D48
BST-15/85-D5
BST-15/100-D12
BST-15/100-D48
➀
➁
➂
➃
➀
Input
Regulation (Max.)
Line
Load
➂
±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%
V
OUT
(Volts)
±5
±5
±12
±12
±12
±15
±15
±15
I
OUT
(mA, Max.)
±250
±250
±105
±125
±125
±85
±100
±100
R/N (mVp-p)
➁
Typ.
Max.
75
75
75
75
75
75
75
75
120
120
150
150
150
150
150
150
V
IN
Nom.
(Volts)
12
48
5
12
48
5
12
48
Range
(Volts)
9-18
18-72
4.5-9
9-18
18-72
4.5-9
9-18
18-72
I
IN
➃
(mA)
25/267
7/69
60/690
25/329
8/81
68/689
25/329
8/81
Efficiency
Min.
Typ.
75%
72%
71%
74%
73%
72%
74%
73%
78%
76%
73%
76%
77%
74%
76%
77%
Package
(Case,
Pinout)
C1, P2
C1, P2
C1, P2
C1, P2
C1, P2
C1, P2
C1, P2
C1, P2
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, 10% to 100% load.
Nominal line voltage, no-load/full-load conditions.
Mechanical Specifications
PART NUMBER STRUCTURE
MECHANICAL SPECIFICATIONS
1.25
(31.75)
B ST
-
15
/
100
-
D48
Output Configuration:
B
= Bipolar
Product Series
Nominal Output Voltages:
±5, ±12 or ±15 Volts
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
0.45
(11.43)
Case C1
STANDOFFS
0.025
(0.64)
0.020 ±0.002 DIA.
(0.508 ±0.051)
0.600
(15.24)
0.200
(5.08)
0.100
(2.54)
0.18
(4.57)
3 4
7
8
0.15 MIN
(3.81)
TEMPERATURE DERATING
Output Power vs. Ambient Temperature
V
IN
Nominal, Natural Convection
3.5
0.600
(15.24)
1 2
5
6
0.80
(20.32)
3
BOTTOM VIEW
PLASTIC CASE WITH AN INSULATED BASE
Output Power (Watts)
2.5
0.10
(2.54)
2
DIMENSIONS ARE IN INCHES (MM)
1.5
I/O Connections
Pin
1
2
3
4
5
6
7
8
Function P2
+Input
+Input
–Input
–Input
Common
+Output
Common
–Output
1
0.5
0
–40
0
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95 100
Ambient Temperature (
˚
C)
2
3 W, D UA L O U T P U T D C / D C C O N V E R T E R S
BST Models
Performance/Functional Specifications
Typical @ T
A
= +25°C under nominal line voltage and full-load conditions unless noted.
➀
Input
Input Voltage Range:
"D5" Models
"D12" Models
"D48" Models
Input Current
Input Filter Type
➁
Reverse-Polarity Protection
4.5-9 Volts (5V nominal)
9-18 Volts (12V nominal)
18-72 Volts (48V nominal)
See Ordering Guide
Pi
Yes (Instantaneous, 2A maximum)
Input Voltage:
"D5" Models
"D12" Models
"D48" Models
Absolute Maximum Ratings
12 Volts
20 Volts
80 Volts
Current must be <2A. Brief duration
only. Fusing recommended.
None
Maximum current and short-circuit
duration are model dependent. “D12”
and “D48” models can withstand
sustained output short circuits.
–55 to +100°C
+280°C
Input Reverse-Polarity Protection
Output Overvoltage Protection
Output Current
Output
V
OUT
Accuracy
(50% load)
Temperature Coefficient
Ripple/Noise
(20MHz BW)
➁
Line/Load Regulation
Efficiency
Isolation Voltage
➂
Short Circuit Protection:
➃
“D5” Models
“D12” and “D48” Models
±1%, maximum
±0.02% per °C
See Ordering Guide
See Ordering Guide
See Ordering Guide
1000Vdc, minimum
Power-limiting technique, auto-recovery
Hiccup technique, auto-recovery
Storage Temperature
Lead Temperature
(soldering, 10 sec.)
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 Specifications Table is not implied.
Dynamic Characteristics
Transient Response
(50% load step)
Switching Frequency:
“D48” Models
“D5” and “D12” Models
200µsec to ±1.5% of final value
200kHz
170kHz
TECHNICAL NOTES
Floating Outputs
Since these are isolated DC/DC converters, their outputs are "floating." Any
BST 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 (pin 6) and –Output (pin 8), with either output grounded. The Com-
mon (pins 5 and 7) should be left open. Minimum 20% loading is recom-
mended under these conditions.
Filtering and Noise Reduction
All BST 3 Watt DC/DC Converters achieve their rated ripple and noise speci-
fications without the use of external input/output capacitors. In critical ap-
plications, 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 capacitors
should be connected between their respective output pin (pins 6 and 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
"D12" Models
"D48" Models
To Reduce Output Ripple
±5V Outputs
±12/15V Outputs
47µF, 10V, Low ESR
22µF, 20V, Low ESR
47µF, 15V
10µF, 35V
4.7µF, 100V
Environmental
Operating Temperature
(Ambient, no derating)
Storage Temperature
–40 to +75°C
–40 to +100°C
Physical
Dimensions
Case Material
Pin Material
Weight
1.25" x 0.8" x 0.45" (31.8 x 20.3 x 11.4mm)
Diallyl phthalate, UL94V-0 rated
Brass, solder coated
0.5 ounces (14.2 grams)
➀
These power converters require a minimum 10% loading 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 DATEL Applications Engineering for details.
➂
Devices can be screened or modified for higher guaranteed isolation voltages.
Contact DATEL Applications Engineering for details.
➃
The current limit inception point is dependent on the input voltage. Therefore, it is possible
to draw current beyond the rated capacity. Users should fully characterize their load
conditions.
In critical, space-sensitive applications, DATEL may be able to tailor the in-
ternal input/output filtering of these units to meet your specific requirements.
Contact our Applications Engineering Group for additional details.
3
XST Series
3W, DUAL OUTPUT DC/DC CONVERTERS
CUSTOM CAPABILITIES
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!
+
C
OUT
+OUTPUT
1, 2
+
6
+INPUT
COMMON
5, 7
C
IN
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-effective power converters
available.
3, 4
–INPUT
–OUTPUT
8
+
C
OUT
Figure 2. Using External Capacitors to Reduce
Input/Output Ripple/Noise
Input Fusing
Certain applications and/or safety agencies may require the installation of fuses at the inputs of
power conversion components. For DATEL BST
3 Watt DC/DC Converters, you should use slow-blow type fuses with values no greater than the
following:
V
IN
Range
"D5"
"D12"
"D48"
Fuse Value
1.5A
1A
0.5A
®
®
DATEL (UK) LTD.
Tadley, England Tel: (01256)-880444
Internet: www.datel-europe.com E-mail: datel.ltd@datel.com
DATEL S.A.R.L.
Montigny Le Bretonneux, France Tel: 01-34-60-01-01
Internet: www.datel-europe.com E-mail: datel.sarl@datel.com
DATEL GmbH
München, Germany Tel: 89-544334-0
Internet: www.datel-europe.com E-mail: datel.gmbh@datel.com
DATEL KK
Tokyo, Japan Tel: 3-3779-1031, Osaka Tel: 6-6354-2025
Internet: www.datel.co.jp Email: salestko@datel.co.jp, salesosa@datel.co.jp
DATEL China
Shanghai, China Tel: 011-86-51317131
E-mail: davidx@datel.com
A SUBSIDIARY OF C&D TECHNOLOGIES
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151
Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
www.datel.com
Email: sales@datel.com
www.cdpowerelectronics.com
ISO 9001 REGISTERED
DS-0443
3/05
DATEL 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. The DATEL logo is a registered DATEL, Inc. trademark.
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