Single Output
UER Models
Features
Low-Cost, Wide-Input-Range
12-15 Watt, DC/DC Converters
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
COMMON
+V
OUT
+V
IN
V
IN
ON/OFF
CONTROL
V
OUT
TRIM
REFERENCE &
ERROR AMP
OPTO
ISOLATION
PWM
CONTROLLER
INNOVATION and EX C ELL E N C E
®
®
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Low cost
Rugged, fully potted, diallyl phthalate
plastic packages
Industry-standard form factor (2" x 2")
and pinout
3.3, 5, 12 or 15 Volt outputs
Wide input voltage ranges:
9-36V or 18-72V
No external components required
Guaranteed efficiencies to 82%
Fully isolated (750Vdc guaranteed)
and I/O protected
V
OUT
trim and on/off control
UL, CSA, IEC safety approvals
Modifications and customs for OEM's
DATEL's UER Model single-output switching DC/DC converters were designed for
cost-sensitive, moderate-power (12-15 Watts) applications requiring a reliable, off-the-
shelf solution but not demanding all the high-performance characteristics of DATEL's A-
Series UWR Model converters. Offering slightly wider electrical tolerances and slightly
lower power densities (8.33W/in
3
), UER devices achieve their low cost through the use
of plastic packaging (UL94V-0 rated material) and the exploitation of traditional, yet
highly automated, SMT-on-pcb construction techniques. The result is a contemporary
power converter whose cost/performance/reliability ratio far exceeds the competition.
UER Model DC/DC converters offer the ultra-wide, 9-to-36V and 18-to-72V, input
voltage ranges that have come to be associated with DATEL power converters. Output
voltages are 3.3V, 5V, 12V or 15V. Line and load regulation are both guaranteed not to
exceed ±1%. All models incorporate internal input/output filtering and require no
external components for normal operation. All units guarantee output ripple/noise less
than 100mVp-p.
These fully isolated (750Vdc guaranteed) devices are input overvoltage and
reverse-polarity protected and employ output current limiting to protect both the power
converter and its load. They offer V
OUT
trim and remote on/off control capabilities. They
function well in harsh environments and are popular for both commercial and industrial
usage in computer, telecom, aerospace and process-control applications.
The industry-standard, 2" x 2", package size and pinout of the UER Models makes
them ideal replacements for other, more costly, less reliable power converters. They
are equally well suited for new design-ins in systems demanding both low cost and high
reliability.
XER Series
1 2 - 1 5 W , S I N G L E O U T P U T D C / D C C O N V E R T E R S
2
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
T E M P E R A T U R E D E R A T I N G
Performance Specifications and Ordering Guide
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.
For 3.3V and 5V outputs, listed specifications apply over the 10% to 100% load range. For 12V and 15V outputs, 20% to 100% load range.
Nominal line voltage, no-load/full-load conditions.
Ripple/Noise
(mVp-p, Max.)
V
OUT
(Volts)
Package
(Case,
Pinout)
Efficiency
(Min.)
Regulation (Max.)
Line
V
IN
Nom.
(Volts)
Range
(Volts)
Model
I
OUT
(mA, Max.)
I
IN
(mA, Max.)
Load
UER-3.3/3650-D12
3.3
3650
75
±1.0%
±1.0%
24
9-36
45/672
77%
C4, P6
UER-3.3/3650-D48
3.3
3650
75
±1.0%
±1.0%
48
18-72
25/336
77%
C4, P6
UER-5/3000-D12
5
3000
100
±1.0%
±1.0%
24
9-36
45/789
80%
C4, P6
UER-5/3000-D48
5
3000
100
±1.0%
±1.0%
48
18-72
25/395
80%
C4, P6
UER-12/1250-D12
12
1250
100
±1.0%
±1.0%
24
9-36
45/770
82%
C4, P6
UER-12/1250-D48
12
1250
100
±1.0%
±1.0%
48
18-72
25/385
82%
C4, P6
UER-15/1000-D12
15
1000
100
±1.0%
±1.0%
24
9-36
45/770
82%
C4, P6
UER-15/1000-D48
15
1000
100
±1.0%
±1.0%
48
18-72
25/385
82%
C4, P6
Output
Input
Nominal Output Voltage:
3.3, 5, 12 or 15 Volts
Maximum Output Current
in mA
Low-Cost, Economy Package
Wide Range Input
Output Configuration:
U = Unipolar
Input Voltage Range:
D12 = 9-36 Volts (24V nominal)
D48 = 18-72 Volts (48V nominal)
U ER
3000 D48
-
/
-
5
BOTTOM VIEW
1.800
(45.72)
0.10
(2.54)
2.00
(50.80)
8
5
6
7
0.40
(10.16)
0.200
(5.08)
0.400
(10.16)
0.100
(2.54)
1
2
4
PLASTIC CASE
INSULATED BASE
0.040 ±0.002 DIA.
(1.016 ±0.051)
2.00
(50.80)
0.20 MIN
(5.08)
0.50
(12.70)
1.200
(30.48)
3 EQ. SP. @
0.400 (10.16)
Case C4
I/O Connections
Pin
1
2
3
4
5
6
7
8
Function P6
+Input
Input
No Pin
On/Off Control
No Pin
+Output
Common
Trim
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
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
3.3V OUTPUTS
A
ALL
OTHERS
B
B
A
UER Models
1 2 - 1 5 W , S I N G L E O U T P U T D C / D C C O N V E R T E R S
3
Floating Outputs
Since these are isolated DC/DC converters, their outputs are "floating." Users
may ground either the Common (pin 7) for normal usage or the positive side
(+Output, pin 6) to effectively reverse the output polarity.
Filtering and Noise Reduction
All UER 12-15 Watt DC/DC Converters achieve their rated ripple and noise
specifications without the use of external input/output capacitors. In critical
applications, input/output 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. The caps 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.
In critical, space-sensitive applications, DATEL may be able to tailor the
internal input/output filtering of these units to meet your specific requirements.
Contact our Applications Engineering Group for additional details.
To Reduce Input Ripple
"D12" Models
20µF, 50V
"D48" Models
20-50µF, 100V
To Reduce Output Ripple
3.3V Outputs
100µF, 6V, Low ESR
5V Outputs
47µF, 10V, Low ESR
12/15V Outputs
22µF, 20V, Low ESR
Performance/Functional Specifications
Typical @ T
A
= +25°C under nominal line voltage and full-load conditions, unless noted.
T E C H N I C A L N O T E S
Input Voltage:
"D12" Models
44 Volts
"D48" Models
88 Volts
Input Reverse-Polarity Protection
Current must be <10A. Brief
duration only. Fusing recommended.
Output Overvoltage Protection:
3.3V Outputs
No 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
40 to +100°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.
Absolute Maximum Ratings
Input
Input Voltage Range:
"D12" Models
9-36 Volts (24V nominal)
"D48" Models
18-72 Volts (48V nominal)
Input Current
See Ordering Guide
Input Filter Type
LC
Overvoltage Shutdown:
"D12 Models"
40 Volts
"D48 Models"
80 Volts
Reverse-Polarity Protection
Yes (Instantaneous, 10A maximum)
On/Off (Sync) Control (Pin 4)
TTL high = off, low (or open) = on
Output
V
OUT
Accuracy (50% load)
±1%, maximum
Temperature Coefficient
±0.02% per °C
Ripple/Noise (20MHz BW)
See Ordering Guide
Line/Load Regulation
See Ordering Guide
Efficiency
See Ordering Guide
Isolation Voltage
750Vdc, minimum
Isolation Capacitance
550pF
Short-Circuit Protection
Continuous, auto-recovery
Overvoltage Protection
Zener/transorb clamp, magnetic feedback
Dynamic Characteristics
Transient Response (50% load step)
200µsec max. to ±1.5% of final value
Switching Frequency
160kHz
Environmental
Operating Temperature (ambient):
Without Derating
25 to +50/55°C (Model dependent)
With Derating
to +95°C (See Derating Curves)
Storage Temperature
40 to +100°C
Physical
Dimensions
2" x 2" x 0.50" (51 x 51 x 12.7mm)
Shielding
None
Case Connection
None
Case Material
Diallyl phthalate, UL94V-0 rated
Pin Material
Brass, solder coated
Weight
2.7 ounces (75.6 grams)
3.3/5V devices require a minimum 10% loading and 12/15V devices 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.
Applying a voltage to the Control pin when no input power is applied to the converter can
cause permanent damage to the converter.
Devices can be screened or modified for higher guaranteed isolation voltages.
Contact DATEL Applications Engineering for details.
Devices can be warranted or screened for 40°C operation.
Contact DATEL Applications Engineering for details.
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.
DATEL (UK) LTD. Tadley, England Tel: (01256)-880444
DATEL S.A.R.L. Montigny Le Bretonneux, France Tel: 01-34-60-01-01
DATEL GmbH München, Germany Tel: 89-544334-0
DATEL KK Tokyo, Japan Tel: 3-3779-1031, Osaka Tel: 6-354-2025
DS-0328 9/98
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151
Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
Internet: www.datel.com Email: sales@datel.com
Data Sheet Fax Back: (508) 261-2857
INNOVATION and EX C ELL E N C E
®
®
ISO 9001
ISO 9001
R E G I
S T E R E D
XER Series
1 2 - 1 5 W , S I N G L E O U T P U T D C / D C C O N V E R T E R S
Input Fusing
Certain applications and/or safety agencies may require the installation of fuses
at the inputs of power conversion components. For DATEL UER
12-15 Watt DC/DC Converters, you should use slow-blow type fuses with
values no greater than the following:
V
IN
Range
Fuse Value
"D12"
3A
"D48"
2A
On/Off Control
The On/Off Control pin (pin 4) may be used for remote on/off operation.
A TTL logic high (+2 to +5 Volts, 250µA max.) applied to pin 4 disables the
converter. A TTL logic low (0 to +0.8 Volts, 70µA max.), or no connection,
enables the converter. Control voltages should be referenced to pin 2
(Input). Applying a voltage to the Control pin when no input power is applied to
the converter can cause permanent damage to the converter.
Synchronization
In critical applications employing multiple switching DC/DC converters, it may
be desirable to intentionally synchronize the switching of selected converters
(so the system noise can be reduced with notch filtering) or to purposely
desynchronize the converters (to lessen the current-carrying requirements on
intermediate dc buses). For multiple UER DC/DC Converters, an external clock
can be applied to pin 4 (Control) of each device. It should be a square wave with
a maximum 1µsec "high" duration and an amplitude between +2V and +5V (see
On/Off Control) referenced to pin 2 (Input). The frequency of the synchronizing
clock should be higher than that of any individual converter. Therefore, it should
be 185kHz ±5kHz.
Output Trimming
V
OUT
may be trimmed ±5% via a single external trimpot or fixed resistor. The
trimpot should be connected as shown in Figure 2a with its wiper connected to
pin 8 (Trim). The trimpot can be used to determine the value of a single fixed
resistor which should be connected as shown in Figure 2b. Connect the resistor
between pin 8 (Trim) and pin 6 (+Output) to trim "down" the output voltage.
Connect the resistor between pins 8 and 7 (Common) to trim "up" the output
voltage. Fixed resistors should be metal-film types with absolute TCR's less
than 100ppm/°C to ensure stability.
Trim
Down
Trim Up
+INPUT
INPUT
OUTPUT
TRIM
COMMON
1
2
6
7
8
LOAD
Trim Down
Trim Up
+INPUT
INPUT
OUTPUT
TRIM
COMMON
1
2
6
7
8
LOAD
20k
5-10
Turns
Figure 2a. Trim Connections Using a Trimpot
Figure 2b. Trim Connections Using Fixed Resistors
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
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