®
®
INNOVATION and EXCELLENCE
Single Output
UHR Models
Ruggedized, 2" x 2"
16-20 Watt, DC/DC Converters
Features
s
s
s
Ruggedized design
All metal-ceramic construction
Low junction-to-baseplate thermal
impedance
No potting compounds
3.3, 5, 12 or 15 Volt outputs
Ultra-wide input voltage ranges:
9-36V or 18-72V
Industry-standard pinouts
No external components required
Tight regulation, low ripple/noise
Guaranteed efficiencies to 82%
V
OUT
trim and on/off control
Modifications and customs for OEM’s
s
s
s
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s
s
s
s
s
DATEL’s XHR Series DC/DC converters deliver a measure of cost-effective long-
term reliability not previously available in commercial, off-the-shelf power converters.
These DC/DC’s combine the high-efficiency and wide-input-range of DATEL’s
venerable XWR Series DC/DC’s with a newly developed, all metal-ceramic, construc-
tion technique that eliminates the need for thermally-conductive potting compounds.
All electrical components are surface-mount soldered to a 60 mil (0.06"/1.52mm)
ceramic baseplate for low junction-to-case thermal resistance. Package pins, instead
of traditional butt soldering, are soldered through the baseplate via pre-cut holes.
Pre-cutting prior to firing, as opposed to laser cutting after firing, eliminates micro
cracks. The tin plated, steel cover is soldered to the baseplate creating a level of
hermiticity not available in other commercial power modules. The bottom of the
baseplate has a conductive layer that provides 6-sided shielding. It is also insulated
so pc-card runs can pass beneath the package.
UHR Models are the single-output devices in the XHR Series. They offer outputs
of 3.3, 5, 12 or 15 Volts. The ultra-wide (4:1) input voltage ranges are either 9-36V
("D12" models) or 18-72V ("D48" models). Line and load regulation are a tight ±0.3%
max. and ±0.5% max., respectively. All devices guarantee that output ripple/noise will
be less than 100mVp-p. Isolation voltage is guaranteed to be at least 750Vdc.
UHR devices carry industry-standard pinouts in packages whose outside
dimensions are only slightly larger than the 2" x 2" standard. They can be subjected
to mutually-agreed-upon, high-rel screening programs as necessary to satisfy your
system's reliability requirements. Contact DATEL for additional details.
+V
IN
+V
OUT
–V
OUT
–V
IN
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
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
XHR Series
Performance Specifications and Ordering Guide
Output
Model
UHR-3.3/4850-D12
UHR-3.3/4850-D48
UHR-5/4000-D12
UHR-5/4000-D48
UHR-12/1650-D12
UHR-12/1650-D48
UHR-15/1300-D12
UHR-15/1300-D48
1 6 - 2 0 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
Regulation (Max.)
Load
Line
±0.5%
±1.0%
±0.3%
±0.3%
±0.3%
±0.3%
±0.3%
±0.3%
±1.0%
±1.0%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
±0.5%
V
OUT
(Volts)
3.3
3.3
5
5
12
12
15
15
I
OUT
(mA, Max.)
4850
4850
4000
4000
1650
1650
1300
1300
Ripple/Noise
(mVp-p, Max.)
75
100
100
100
100
100
100
100
V
IN
Nom.
(Volts)
24
48
24
48
24
48
24
48
Range
(Volts)
9-36
18-72
9-36
18-72
9-36
18-72
9-36
18-72
I
IN
(mA, Max.)
45/916
25/440
25/1060
25/526
30/1050
25/514
30/1000
30/495
Efficiency
(Min.)
75%
78%
79%
80%
81%
81%
82%
82%
Package
(Case,
Pinout)
C8, P6
C8, P6
C8, P6
C8, P6
C8, P6
C8, P6
C8, P6
C8, P6
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.
PART NUMBER STRUCTURE
M E C H A N I C A L S P E C I F I C AT I O N S
U HR
-
5
/
4000
-
D12
Output Configuration:
U
= Unipolar
Metal-Ceramic Construction
Wide Range Input
Nominal Output Voltage:
3.3, 5, 12 or 15 Volts
Maximum Output Current
in mA
Input Voltage Range:
D12
= 9-36 Volts (24V nominal)
D48
= 18-72 Volts (48V nominal)
0.06
(1.52)
0.45
(11.43)
2.06
(52.32)
2.00
(50.80)
METAL CASE
Case C8
CERAMIC
BASEPLATE
0.040 ±0.002 DIA.
(1.016 ±0.051)
0.30
(7.62)
1.800
(45.72)
0.13
(3.30)
T E M P E R AT U R E D E R AT I N G
0.200
(5.08)
5
20
19
18
17
16
15
D
C
E
0.400
(10.16)
4
1
2
6
7
1.200
(30.48)
3 EQ. SP. @
0.400 (10.16)
2.06
(52.32)
Output Power (Watts)
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
–40
0
35
40
45
50
55
60
65
70
75
80
85
90
95
UHR-3.3/4850-D12
UHR-3.3/4850-D48
UHR-5/4000-D12
UHR-5/4000-D48
UHR-12/1650-D12
UHR-12/1650-D48
UHR-15/1300-D12
UHR-15/1300-D48
A
A
B
B
C
C
D
E
A
B
0.100
(2.54)
BOTTOM VIEW
8
0.43
(10.92)
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
Notes:
For "D12" models,
the case is connected to
pin 2 (–V
IN
).
For "D48" models, the case
is connected to pin 1 (+V
IN
).
Ambient Temperature (°C)
2
1 6 - 2 0 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
UHR Models
Performance/Functional Specifications
Typical @ T
A
= +25°C under nominal line voltage and full load conditions unless noted.
Input
Input Voltage Range:
"D12" Models
"D48" Models
Input Current
Input Filter Type
Absolute Maximum Ratings
Input Voltage:
"D12" Models
"D48" Models
Input Reverse-Polarity Protection
Output Overvoltage Protection:
3.3V Outputs
5V Outputs
12V Outputs
15V Outputs
Output Current
9-36 Volts (24V nominal)
18-72 Volts (48V nominal)
See Ordering Guide
LC
44 Volts
80 Volts
Current must be <10A. Brief duration
only. Fusing recommended.
No protection
6.8 Volts, limited duration
15 Volts, limited duration
18 Volts, limited duration
Current limited. Max. current and
short-circuit duration model
dependent
–55 to +125°C
+300°C
Overvoltage Shutdown:
"D12" Models
"D48" Models
Reverse-Polarity Protection
40 Volts
76 Volts
Yes (Instantaneous, 10A maximum)
On/Off (Sync) Control
(Pin 4)
V
OUT
Accuracy
(50% load)
Temperature Coefficient
Ripple/Noise
(20MHz BW)
Line/Load Regulation
Efficiency
Isolation Voltage
Isolation Capacitance
Current Limiting
TTL high = off, low (or open) = on
Output
±1%, maximum
±0.02% per °C
See Ordering Guide
See Ordering Guide
See Ordering Guide
750Vdc, minimum
550pF
Auto-recovery
Storage Temperature
Lead Temperature
(soldering, 10sec.)
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.
TECHNICAL NOTES
Overvoltage Protection
Transient Response
(50% load step)
Zener/transorb clamp, magnetic feedback
Dynamic Characteristics
200µsec max. to ±1.5% of final value
Floating Outputs
All 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 UHR 16-20 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.
To Reduce Input Ripple
"D12" Models
"D48" Models
To Reduce Output Ripple
3.3V Outputs
5V Outputs
12/15V Outputs
20µF, 50V
20-50µF, 100V
100µF, 6V, Low ESR
47µF, 10V, Low ESR
22µF, 20V, Low ESR
Switching Frequency
165kHz (±10kHz)
Environmental
Operating Temperature
(Ambient):
Without Derating
With Derating
Maximum Baseplate Temperature
Storage Temperature
Dimensions
Shielding
–40 to +35/40/45/50°C (Model dependent)
to +95°C (See Derating Curves)
+95°C
–55 to +125°C
Physical
2.06" x 2.06" x 0.45" (52 x 52 x 11.4mm)
6-sided
Case Connection:
"D12" Models
"D48" Models
Case Material:
Cover
Baseplate
Pin Material
Weight
Pin 2 (–V
IN
)
Pin 1 (+V
IN
)
Tin plated steel
Ceramic (0.06"/1.52mm)
Brass, solder coated
1.7 ounces (49.5 grams)
These 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.
Applying a voltage to the Control pin when no input power is applied to the converter can
cause permanent damage to the converter.
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.
3
XHR Series
Input Fusing
Certain applications and/or safety agencies may require the installation of
fuses at the inputs of power conversion components. For DATEL UHR
16-20 Watt DC/DC Converters, you should use slow-blow type fuses with
values no greater than the following:
V
IN
Range
"D12"
"D48"
Fuse Value
4A
2A
1 6 - 2 0 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
OUTPUT
1
+INPUT
TRIM
2
–INPUT
6
Trim Down
8
20kΩ
5-10
Turns
Trim Up
7
LOAD
COMMON
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 certain applications employing multiple UHR converters and also
demanding minimal noise levels, some improvements may be had by
synchronizing the switching of the various converters. The synchronizing
clock should 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 180kHz ±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). A 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.
1
+INPUT
TRIM
2
–INPUT
7
COMMON
Trim Up
8
LOAD
Figure 2a. Trim Connections Using a Trimpot
OUTPUT
6
Trim
Down
Figure 2b. Trim Connections Using Fixed Resistors
®
®
ISO 9001
R E G I S T E R E D
INNOVATION and EXCELLENCE
DS-0355
10/98
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
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
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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