* "D24" models only
Single Output
UWR Models
Features
Figure 1. Simplified Schematic
+V
IN
V
IN
+V
OUT
PWM
*
COMMON
The migration to distributed power is accelerating. The critical need for accurate
voltages, tight regulation and rapid transient response is propelling the move to power
processing at the "point-of-use" with low-power DC/DC converters physically located
right at their loads.
DATEL's miniature, full featured, 5 Watt UWR Models were specifically designed for
today's demanding distributed power architectures in aerospace, marine, telecom and
computer applications. The converters' low cost, small size (1" x 1" x 0.45") and full 5
Watt output capability give system architects unprecedented design and layout flexibility.
Occupying less than 0.5in
3
total volume, these extremely compact, fully regulated
and isolated (1000Vdc guaranteed) modules are available with either 5, 12 or 15 Volt
outputs. Input voltage ranges are either 18-36 Volts ("D24" models) or 36-72 Volts ("D48"
models).
Although their overall size is 50-75% smaller than many similarly rated power
modules, these 1" x 1" UWR Models are exact, drop-in, pin-for-pin replacements for
many standard 2" x 1" and 2" x 2", 5 Watt modules. They achieve their small size and low
cost by exploiting a novel feedback approach that does not depend upon traditional
optocoupler techniques.
All models are 5-side shielded and have a non-conductive baseplate that permits pc-
card runs to be placed beneath the package. Units are assembled using high-speed
automated SMT techniques and are fully encapsulated with thermally conductive potting
compound. Every unit is electrically tested before and after encapsulation, 100% burned-
in under full load, hi-pot tested, and final-electrical tested prior to shipment. Every unit
meets DATEL's traditional high standards for quality and long-term reliability.
Miniature, 1" x 1"
5 Watt, DC/DC Converters
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
INNOVATION and EX C ELL E N C E
®
®
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Small size, 1" x 1" x 0.45"
Full 5 Watts output power
No external components required
Drop-in replacements for many
standard, 2" x 1" DC/DC's
Wide input voltage ranges:
18-36V or 36-72V
5, 12, or 15V outputs
Guaranteed efficiencies to 80%
Fully regulated and isolated
(1000Vdc guaranteed)
Output overvoltage protection and
current limiting
25 to +95
o
C operating temperature
Shielded cases (5 sides)
UL 1950, CSA 22.2 No. 234, IEC 950
Modifications and customs for OEM's
M I N I A T U R E , 5 W A T T D C / D C C O N V E R T E R S
XWR Series
2
O
u
tp
u
t
P
o
w
e
r (W
a
t
ts
)
Ambient Temperature (°C)
25 0 35 40 45 50 55 60 65 70 75 80 85 90 95
5
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
I/O Connections
Function P3
+Input
Input
+Output
No Pin
No Pin
Common
Notes:
For "D24" models, the case
is connected to pin 2 (V
IN
).
For "D48" models, the case
is connected to pin 1 (+V
IN
).
Pin
1
2
3
4
5
6
15
U WR
335 D24
-
/
-
Input Voltage Range:
D24 = 18-36 Volts (24V nominal)
D48 = 36-72 Volts (48V nominal)
Maximum Output Current
in mA
Nominal Output Voltage
5, 12 or 15 Volts
Wide Range Input
Output Configuration:
U = Unipolar
P A R T N U M B E R S T R U C T U R E
T E M P E R A T U R E D E R A T I N G
M E C H A N I C A L S P E C I F I C A T I O N S
METAL CASE
INSULATED BASE
0.040 ±0.002 DIA.
(1.016 ±0.051)
1.00
(25.40)
0.45
(11.43)
0.20 MIN.
(5.08)
0.200
(5.08)
0.10
(2.54)
1.00
(25.40)
0.800
(20.32)
0.100
(2.54)
0.800
(20.32)
0.200
(5.08)
0.400
(10.16)
0.10
(2.54)
BOTTOM VIEW
3
1
2
4
6
5
UWR-5/1000-D24
5
1000
120
±2%
±2%
24
18-36
25/282
75%
C7, P3
UWR-5/1000-D48
5
1000
120
±2%
±2%
48
36-72
25/141
75%
C7, P3
UWR-12/420-D24
12
420
150
±2%
±2%
24
18-36
25/265
80%
C7, P3
UWR-12/420-D48
12
420
150
±2%
±2%
48
36-72
25/133
80%
C7, P3
UWR-15/335-D24
15
335
150
±2%
±2%
24
18-36
25/264
80%
C7, P3
UWR-15/335-D48
15
335
150
±2%
±2%
48
36-72
25/132
80%
C7, P3
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.
20% to 100% load.
Nominal line voltage, no-load/full-load conditions.
Performance Specifications and Ordering Guide
Ripple/Noise
(mVp-p, Max.)
V
OUT
(Volts)
Output
Package
(Case,
Pinout)
Efficiency
(Min.)
Regulation (Max.)
Line
V
IN
Nom.
(Volts)
Range
(Volts)
Model
Input
I
OUT
(mA, Max.)
I
IN
(mA, Max.)
Load
Case C7
M I N I A T U R E , 5 W A T T D C / D C C O N V E R T E R S
UWR Models
3
Floating Outputs
Since these are isolated DC/DC converters, their outputs are "floating."
Users may ground either the Common (pin 6) for normal usage or the
positive side (+Output, pin 3) to effectively reverse the output polarity.
Filtering and Noise Reduction
All UWR 5 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 low-ESR, tantalum or electrolytic capacitors across the input
and/or output terminals. The capacitors should be located as close to the
power converters as possible. Typical values are listed below. In many
applications, using values greater than those listed will yield better results.
To Reduce Input Ripple
"D24" Models
20µF, 50V
"D48" Models
10µF, 100V
To Reduce Output Ripple
5V Outputs
47µF, 10V, Low ESR
12/15V Outputs
33µF, 20V, Low ESR
In critical, space-sensitive applications, DATEL may be able to tailor the
internal input/output filtering of these units to meet your specific require-
ments. Contact our Applications Engineering Group for additional details.
Input Fusing
Certain applications and/or safety agencies may require the installation of
fuses at the inputs of power conversion components. For DATEL UWR
5 Watt DC/DC Converters, you should use slow-blow type fuses with values
no greater than 0.5A.
Absolute Maximum Ratings
T E C H N I C A L N O T E S
Input Voltage:
"D24" Models
40 Volts
"D48" Models
80 Volts
Input Reverse-Polarity Protection
Current must be < 6A. Brief
duration only. Fusing recommended.
Output Overvoltage Protection:
5V Outputs
6.8 Volts, limited duration
12V Outputs
15 Volts, limited duration
15V Outputs
18 Volts, limited duration
Output Current
Current limited. Max. current and
short-circuit duration are model
dependent.
Storage Temperature
55 to +125°C
Lead Temperature (soldering, 10 sec.)
+300°C
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.
Performance/Functional Specifications
Typical @ T
A
= +25°C under nominal line voltage and full-load conditions, unless noted.
These power converters require a minimum 20% loading to maintain specified regulation.
Operation under no-load conditions will not damage these devices; however
they may not meet all listed specifications.
Application-specific input/output filtering can be recommended and perhaps added
internally upon request. Contact DATEL Applications Engineering for details.
Units can be screened or modified for higher guaranteed isolation voltages.
Contact DATEL Applications Engineering for details.
Units can be warranted or screened for lower-temperature operation.
Contact DATEL Applications Engineering for details.
Input
Input Voltage Range:
"D24" Models
18-36 Volts (24V nominal)
"D48" Models
36-72 Volts (48V nominal)
Input Current
See Ordering Guide
Input Filter Type
LC on "D24" models
C on "D48" models
Reverse-Polarity Protection
Yes (Instantaneous, 6A maximum)
Output
V
OUT
Accuracy (50% load):
5V Outputs
±1.5%, maximum
12/15V Outputs
±1%, maximum
Temperature Coefficient
±0.02% per °C
Ripple/Noise (20MHz BW)
See Ordering Guide
Line Regulation
See Ordering Guide
Load Regulation
See Ordering Guide
Efficiency
See Ordering Guide
Isolation Voltage
1000Vdc, minimum
Current Limiting
Auto-recovery
Overvoltage Protection
Zener/transorb clamp
Dynamic Characteristics
Transient Response (50% load step)
500µsec max. to ±2% of final value
Switching Frequency
170kHz (±10kHz)
Environmental
Operating Temperature (Ambient):
Without Derating
25 to +60°C
With Derating
to +95°C (See Derating Curve)
Storage Temperature
55 to +125°C
Physical
Dimensions
1" x 1" x 0.45" (25.4 x 25.4 x 11.4mm)
Shielding
5-sided
Case Connection:
"D24" Models
Pin 2 (V
IN
)
"D48" Models
Pin 1 (+V
IN
)
Case Material
Corrosion resistant steel with
non-conductive,epoxy-based, black
enamel finish and plastic baseplate
Pin Material
Brass, solder coated
81
80
79
78
77
76
75
E
f
f
i
ciency (%
)
Input Voltage (Volts)
Efficiency vs. Input Voltage
(Full-load conditions. Guaranteed efficiency = 75% at V
IN
= 24V )
18 21 24 27 30 33 36
4
The performance curves below were derived from actual test data for a single model number (UWR-5/1000-D24).
Since all devices in this Series have the same circuit topology, the performance curves are representative of all devices.
Typical Performance Curves (T
A
= +25°C)
E F F I C I E N C Y V S . I N P U T V O L T A G E A N D O U T P U T L O A D
L I N E R E G U L A T I O N
L O A D R E G U L A T I O N
82
80
78
76
74
72
70
E
f
f
i
ciency (%
)
Output Current (Amps)
Efficiency vs. Output Load
(V
IN
= nominal = 24V. Guaranteed efficiency at full load = 75%)
0.2 0.4 0.6 0.8 1.0
5.15
5.10
5.05
5.00
4.95
4.90
4.85
O
u
tp
u
t
V
o
ltag
e (V
olts)
Input Voltage (Volts)
Output Voltage vs.Input Voltage
(Full-load conditions. Nominal V
OUT
= 5V)
18 21 24 27 30 33 36
5.06
5.04
5.02
5.00
4.98
4.96
4.94
O
u
tp
u
t
V
o
ltag
e (V
olts)
Output Current (Amps)
Output Voltage vs. Output Load
(V
IN
= nominal = 24V. Nominal V
OUT
= 5V)
0.2 0.4 0.6 0.8 1.0
M I N I A T U R E , 5 W A T T D C / D C C O N V E R T E R S
XWR Series
5
If you're designing with EMC in mind, please note that all of DATEL's UWR
5 Watt DC/DC Converters have been characterized for radiated 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. Correlation to other specifications
can be supplied upon request. Radiated emissions plots to FCC and CISPR
22 for model UWR-5/1000-D24 appear below. Its performance is typical of
all models in the Family. Published EMC test reports are available for each
model number. Contact DATEL's Applications Engineering Department for
details.
E M I R A D I A T E D E M I S S I O N S
M I N I A T U R E , 5 W A T T D C / D C C O N V E R T E R S
UWR Models
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!
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.
C U S T O M C A P A B I L I T I E S
UWR-5/1000-D24 Radiated Emissions
FCC Part 15 Class B, 3 Meters
Converter Output = 5Vdc @ 800mA
80
70
60
50
40
30
20
10
0
10
20
Frequency (MHz)
100
1000
Radiated Emissions
FCC Class B Limit
R
a
di
a
t
ed Em
i
ssi
ons (
d
B
µ
V/
M
)
UWR-5/1000-D24 Radiated Emissions
EN 55022 Class B, 10 Meters
Converter Output = 5Vdc @ 800mA
80
70
60
50
40
30
20
10
0
10
20
Frequency (MHz)
100
1000
Radiated Emissions
EN 55022 Class B Limit
R
a
di
a
t
ed Em
i
ssi
ons (
d
B
µ
V/
M
)
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