®
®
NEW
1.5, 1.8 & 2.5 Volt
Models
A-SERIES
INNOVATION and EXCELLENCE
Single Output
A-Series, UWR Models
High-Density, 2" x 1"
1-6 Amp, 9-15 Watt DC/DC's
The new 1.5V, 1.8V and 2.5V models in DATEL’s flagship 9-15 Watt A-Series
can source a continuous 6 Amps. This is the most "low-voltage" current available
from a standard 1" x 2" package, and these power converters exemplify DATEL’s
relentless drive to bring you more power/current, from standard packages, without
compromising reliability or resorting to thermal specmanship.
By combining a high-frequency (310kHz), high-efficiency (to 88%), synchronous-
rectifier topology with the newest components and time-tested, fully automated,
SMT-on-pcb construction, these UWR Models are able to bring you 9-15W (@ up
to 6A) in the standard 2" x 1" package from which most competitors can only get
5-10W (@ 3-4A). All UWR’s deliver their full output power over ambient temperature
ranges from –40°C to as high as +70°C (model and input voltage dependent) without
heat sinks or supplemental forced-air cooling. Devices derate to +100°C.
Output voltages are 1.5, 1.8, 2.5, 3.3, 5, 12 or 15 Volts. Input voltage ranges
are 10-18V ("D12" models), 18-36V ("D24" models) or 36-75V ("D48") models. All
models feature input pi filters, input undervoltage and overvoltage lockout, input
reverse-polarity protection, output overvoltage protection, output current limiting, and
continuous short-circuit protection. On/off control, sync, and output-trim functions are
optional (see Optional Functions). All models are certified to IEC950, UL1950 and
EN60950 safety requirements for OPERATIONAL insulation. "D48" models (36-75V
inputs) are CE marked.
UWR 9-15W DC/DC’s are packaged in low-cost, light-weight, diallyl phthalate
(UL94V-0 rated) plastic packages with standoffs. EMC compliance is achieved via a
low-noise design rather than through expensive metal shielding.
Features
■
■
■
■
■
■
1.5/1.8/2.5V
OUT
models source 6 Amps
3.3V
OUT
models source 4.25 Amps
5/12/15V
OUT
models deliver full 15 Watts
310kHz synchronous-rectifier topologies
Guaranteed efficiencies to 86%
Choice of 3 input voltage ranges:
10-18V, 18-36V, 36-75V
–40 to +60/70°C ambient w/o derating
Fully isolated (1500Vdc); I/O protected
UL1950/EN60950 certified
CE mark (75V
IN
models)
Standard 2" x 1" packages and pinouts
Optional V
OUT
trim, sync, on/off control
Pin compatible with Lucent LC/LW Series
■
■
■
■
■
■
■
+V
IN
+V
OUT
SWITCH
CONTROL
–V
OUT
–V
IN
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
TRIM
(OPTIONAL)
ON/OFF
CONTROL
OR SYNC
(OPTIONAL)
UVLO & OVLO
COMPARATORS
1.5, 1.8, 2.5, 3.3V and 5V-output models use the synchronous-rectifier configuration shown above.
12V and 15V-output models employ a standard forward architecture.
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
A Series
➀
9 - 1 5 W, S I N G L E O U T P U T D C / D C C O N V E RT E R S
Performance Specifications and Ordering Guide
Output
Model
UWR-1.5/6000-D12A
UWR-1.5/6000-D24A
UWR-1.5/6000-D48A
UWR-1.8/6000-D12A
UWR-1.8/6000-D24A
UWR-1.8/6000-D48A
UWR-2.5/6000-D12A
UWR-2.5/6000-D24A
UWR-2.5/6000-D48A
UWR-3.3/4250-D12A
UWR-3.3/4250-D24A
UWR-3.3/4250-D48A
UWR-5/3000-D12A
UWR-5/3000-D24A
UWR-5/3000-D48A
UWR-12/1250-D12A
UWR-12/1250-D24A
UWR-12/1250-D48A
UWR-15/1000-D12A
UWR-15/1000-D24A
UWR-15/1000-D48A
Input
Regulation (Max.)
Line
±0.2%
±0.2%
±0.2%
±0.2%
±0.2%
±0.2%
±0.2%
±0.2%
±0.2%
±0.2%
±0.2%
±0.2%
±0.2%
±0.2%
±0.2%
±0.2%
±0.2%
±0.2%
±0.2%
±0.2%
±0.2%
V
OUT
(Volts)
1.5
1.5
1.5
1.8
1.8
1.8
2.5
2.5
2.5
3.3
3.3
3.3
5
5
5
12
12
12
15
15
15
I
OUT
(mA)
6000
6000
6000
6000
6000
6000
6000
6000
6000
4250
4250
4250
3000
3000
3000
1250
1250
1250
1000
1000
1000
R/N (mVp-p)
➁
Typ.
45
45
45
50
50
50
60
60
60
85
85
85
85
85
85
85
85
85
85
85
85
Max.
65
65
65
70
70
70
80
80
80
100
100
100
100
100
100
100
100
100
100
100
100
Load
➂
±0.3%
±0.3%
±0.3%
±0.3%
±0.3%
±0.3%
±0.3%
±0.3%
±0.3%
±0.5%
±0.5%
±0.5%
±0.3%
±0.3%
±0.3%
±0.3%
±0.3%
±0.3%
±0.3%
±0.3%
±0.3%
V
IN
Nom.
(Volts)
12
24
48
12
24
48
12
24
48
12
24
48
12
24
48
12
24
48
12
24
48
Range
(Volts)
10-18
18-36
36-75
10-18
18-36
36-75
10-18
18-36
36-75
10-18
18-36
36-75
10-18
18-36
36-75
10-18
18-36
36-75
10-18
18-36
36-75
I
IN
➃
(mA)
85/914
50/454
40/226
85/1084
50/539
40/268
80/1489
45/740
35/367
80/1375
45/672
35/336
110/1471
55/710
35/355
20/1471
20/718
20/359
20/1471
20/718
20/359
Efficiency
Min.
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
TBD
83%
84.5%
85%
83%
85.5%
85.5%
82.5%
85%
85%
82.5%
85%
85%
Typ.
82%
82.5%
83%
83%
83.5%
84%
84%
84.5%
85%
85%
87%
87%
85%
88%
88%
85%
87%
87%
85%
87%
87%
Package
(Case,
Pinout)
C14, P22
C14, P22
C14, P22
C14, P22
C14, P22
C14, P22
C14, P22
C14, P22
C14, P22
C14, P22
C14, P22
C14, P22
C14, P22
C14, P22
C14, P22
C14, P22
C14, P22
C14, P22
C14, P22
C14, P22
C14, P22
PRELIMINARY
➀
Typical at T
A
= +25°C under nominal line voltage and full-load conditions, unless otherwise noted.
➁
Ripple/Noise (R/N) is tested/speciifed over a 20MHz bandwidth. All models are specified with two
external 0.47µF multi-layer ceramic capacitors installed across their output pins.
➂
Load regulation is specified over 10%-100% load conditions. 1.5-5V models are stable and
regulate under no-load conditions. 12/15V models have minimum loading requirements.
See Performance/Functional Specifications.
➃
Nominal line voltage, no-load/full-load conditions.
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
U WR
-
5
/
3000
-
D48 A CT LX
Output Configuration:
U
= Unipolar
Wide Range Input
Nominal Output Voltage:
1.5, 1.8, 2.5, 3.3, 5, 12 or 15 Volts
Maximum Output Current
in mA
Optional Functions
See Below
A-Series
High Reliability
Input Voltage Range:
D12
= 10-18 Volts (12V nominal)
D24
= 18-36 Volts (24V nominal)
D48
= 36-75 Volts (48V nominal)
0.20 MIN
(5.08)
2.00
(50.80)
PLASTIC CASE
0.49
(12.45)
Pin Length Option:
L1
= 0.110"
L2
= 0.145"
Case C14
STANDOFF
0.020 (0.51)
0.040 ±0.002 DIA.
(1.016 ±0.051)
0.800
(20.32)
0.60
(15.24)
4
1
1.00
(25.40)
0.100
(2.54)
0.800
(20.32)
0.400
(10.16)
5
2
3
BOTTOM VIEW
DIMENSION ARE IN INCHES (MM)
0.10
(2.54)
6
Optional Functions
T
Trim function on pin 5. No pin 3.
0.200
(5.08)
C
On/Off Control function (positive polarity) on pin 3. No pin 5.
CT
On/Off Control function (positive polarity) on pin 3. Trim function on pin 5.
L1
Pin length: 0.110 in. (2.79mm) ±0.010
L2
Pin length: 0.145 in. (3.68mm) ±0.010
N
On/Off Control function (negative polarity) on pin 3. No pin 5.
NT
On/Off Control function (negative polarity) on pin 3. Trim function on pin 5.
S
Sync function on pin 3. No pin 5.
ST
Sync function on pin 3. Trim function on pin 5.
Blank
-- No Trim function. No On/Off Control function.
I/O Connections
Pin Function P22
1
+Input
2
–Input
3
On/Off Control*
4
+Output
5
Trim*
6
Common
* Pins 3 and 5 are optional.
See Optional Functions and
Technical Notes for details.
2
9 - 1 5 W, S I N G L E O U T P U T D C / D C C O N V E RT E R S
UWR Models
Performance/Functional Specifications
Typical @ T
A
= +25°C under nominal line voltage and full-load conditions, unless noted.
➀➁
Dynamic Characteristics
Transient Response
(50% load step)
Start-Up Time:
➂
V
IN
to V
OUT
On/Off to V
OUT
Switching Frequency
Operating Temperature
(Ambient):
Without Derating
➆
With Derating
Case Temperature:
Maximum Allowable
Storage Temperature
Dimensions
200µsec max. to ±1.5% of final value
50msec
30msec
310kHz (±30kHz)
Input
Input Voltage Range:
D12A Models
D24A Models
D48A Models
Overvoltage Shutdown:
D12A Models
D24A Models
D48A Models
Start-Up Threshold:
➂
D12A Models
D24A Models
D48A Models
Undervoltage Shutdown:
➂
D12A Models
D24A Models
D48A Models
Input Current:
Normal Operating Conditions
Standby Mode (Off, OV, UV)
Input Filter Type
Reverse-Polarity Protection
On/Off Control
(Optional, Pin 3):
➃ ➄
D12AC, D24AC, & D48AC Models
D12AN, D24AN, & D48AN Models
Sync
(Optional, Pin 3)
➂ ➃
Input Threshold (Rising edge active)
Input Voltage Low
Input Voltage High
Input Resistance
Output High Voltage (100µA load)
Output Drive Current
Input/Output Pulse Width
V
OUT
Accuracy
(50% load):
1.5V/1.8V/2.5V/3.3V Outputs
5/12/15V Outputs
10-18 Volts (12V nominal)
18-36 Volts (24V nominal)
36-75 Volts (48V nominal)
18.5-21 Volts (20V typical)
37-40 Volts (38V typical)
77-81 Volts (78.5V typical)
9.4-9.8 Volts (9.6V typical)
16.5-18 Volts (17V typical)
34-36 Volts (35V typical)
7.5-8.5 Volts (8V typical)
16-17 Volts (16.5V typical)
32.5-35.5 Volts (34V typical)
See Ordering Guide
5mA
Pi
Brief duration, 10A maximum
On = open or 13V - +V
IN
, I
IN
= 50µA max.
Off = 0-0.8V, I
IN
= 1mA max.
On = 0-0.8V, I
IN
= 2.6mA max.
Off = open or 3.3-5.5V, I
IN
= 1mA max.
1-2.7 Volts
0-0.9 Volts
2.8-5 Volts
35kΩ minimum
3.5-4.8 Volts
35mA
160-360nsec
Environmental
–40 to +60/70°C
to +100°C (See Derating Curves)
+100°C
–40 to +105°C
Physical
2" x 1" x 0.49" (51 x 25 x 12.45mm)
None
Diallyl phthalate, UL94V-0 rated
Brass, solder coated
1.4 ounces (39.7 grams)
Shielding
Case Material
Pin Material
Weight
➀
All models are specified with two external 0.47µF multi-layer ceramic capacitors installed
across their output pins.
➁
See Minimum Output Loading Requirements under Technical Notes.
➂
See Technical Notes for details.
➃
The On/Off Control, Sync and Trim functions are optional and must be installed by DATEL.
See Optional Functions or contact DATEL for details.
➄
The On/Off Control is designed to be driven with open-collector logic or the application of
appropriate voltages (referenced to –Input (Pin 2)). Applying a voltage to the On/Off Control
pin when no input voltage is applied to the converter may cause permanent damage.
See Technical Notes.
➅
Output noise maybe further reduced with the addition of additional external output
capacitors. See Technical Notes.
➆
Operating temperature range without derating is model and input-voltage dependent.
See Temperature Derating.
Absolute Maximum Ratings
Input Voltage:
Continuous:
D12 Models
D24 Models
D48 Models
Transient (100msec):
D12 Models
D24 Models
D48 Models
Input Reverse-Polarity Protection
Output
±1.5%, maximum
±1%, maximum
22 Volts
44 Volts
88 Volts
50 Volts
50 Volts
100 Volts
Current must be <10 Amps. Brief
duration only. Fusing recommended.
TBD/TBD Volts, unlimited duration
TBD/4.5 Volts, unlimited duration
6.8/15/18 Volts, unlimited duration
Current limited. Devices can
withstand sustained output short
circuits without damage.
+100°C
–40 to +105°C
+300°C
Minimum Loading for Specification:
➁
1.5V/1.8V/2.5V/3.3V/5V Outputs
No load
12V/15V Outputs
10% of I
OUT
max.
Minimum Loading for Stability:
➁
1.5V/1.8V/2.5V/3.3V/5V Outputs
12V/15V Outputs
Ripple/Noise
(20MHz BW)
➀ ➅
Line/Load Regulation
Efficiency
Isolation Voltage:
Input-to-Output
Isolation Capacitance
Isolation Resistance
Current Limiting:
1.5V/1.8V/2.5V/3.3V/5V Outputs
12V/15V Outputs
Overvoltage Protection
Temperature Coefficient
No load
25mA
See Ordering Guide
See Ordering Guide
See Ordering Guide
1500Vdc minimum
470pF
100MΩ
Hiccup technique, auto-recovery
Power-limiting technique, auto-recovery
Zener/transorb clamp, magnetic feedback
±0.04% per °C.
Output Overvoltage Protection:
1.5/1.8V Outputs
2.5V/3.3V Outputs
5V/12V/15V Outputs
Output Current
Case Temperature
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.
3
A Series
9 - 1 5 W, S I N G L E O U T P U T D C / D C C O N V E RT E R S
T E C H N I C A L
N O T E S
Trim adjustment greater than 5% can have an adverse effect on the convert-
er's performance and is not recommended.
4
+OUTPUT
+INPUT
Floating Outputs
Since these are isolated DC/DC converters, their outputs are "floating."
Designers will usually use the output Common (pin 6) as the ground/return of
the load circuit. You can, however, use the +Output (pin 4) as ground/return to
effectively reverse the output polarity.
Minimum Output Loading Requirements
1.5-5V models employ a synchronous-rectifier design topology. All models
regulate within spec and are stable under no-load conditions. 12/15V models
employ a traditional forward architecture and require 10% loading (125mA for
12V models, 100mA for 15V models) to achieve their listed regulation specs.
12/15V models also have a minimum-load-for-stability requirement (25mA).
For 12/15V models, operation between 25mA and 10% loading will result
in stable operation but regulation may degrade. Operation under no-load
conditions will not damage the 12/15V devices; however they may not meet
all listed specifications.
Filtering and Noise Reduction
All A-Series UWR 9-15 Watt DC/DC Converters achieve their rated ripple and
noise specifications using the external input and output capacitors specified
in the Performance/Functional Specifications table. In critical applications,
input/output noise may be further reduced by installing additional external I/O
caps. Input capacitors should be selected for bulk capacitance, low ESR and
high rms-ripple-current ratings. Output capacitors should be selected for low
ESR and appropriate frequency response. All caps should have appropriate
voltage ratings and be mounted as close to the converters as possible.
The most effective combination of external I/O capacitors will be a function
of your particular load and layout conditions. Our Applications Engineers will
be happy to recommend potential solutions and can discuss the possibility of
our modifying a given device’s internal filtering 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. Fuses should also be
used if the possibility of sustained, non-current-limited, input-voltage polarity
reversals exists. For DATEL A-Series UWR 9-15 Watt DC/DC Converters, you
should use slow-blow type fuses with values no greater than the following.
V
IN
Range
"D12A" Models
"D24A" Models
"D48A" Models
Trimming Output Voltages
These converters have a trim capability (pin 5) that allows users to adjust the
output voltage ±5%. Adjustments to the output voltage can be accomplished
via a trim pot, Figure 2, or a single fixed resistor as shown in Figures 3 and 4.
A single fixed resistor can increase or decrease the output voltage depending
on its connection. Fixed resistors should have an absolute TCR less than
100ppm/°C to minimize sensitivity to changes in temperature.
A single resistor connected from the Trim (pin 5) to the +Output (pin 4), see
Figure 3, will decrease the output voltage. A resistor connected from the Trim
(pin 5) to Output Common (pin 6) will increase the output voltage.
Fuse Value
3 Amps
2 Amps
1 Amp
Model
UWR-3.3/4250-D12A
UWR-3.3/4250-D24A
UWR-3.3/4250-D48A
1
2
–INPUT
TRIM
5
20kΩ
5-22
Turns
LOAD
3
ON/OFF
CONTROL
COMMON
6
Figure 2. Trim Connections Using A Trim Pot
4
R
TRIM DOWN
2
–INPUT
TRIM
5
LOAD
1
+INPUT
+OUTPUT
3
ON/OFF
CONTROL
COMMON
6
Figure 3. Trim Connections To Decrease Output Voltage Using Fixed Resistors
1
+INPUT
+OUTPUT
4
2
–INPUT
TRIM
5
LOAD
R
TRIM UP
3
ON/OFF
CONTROL
COMMON
6
Figure 4. Trim Connections To Increase Output Voltage Using Fixed Resistors
Trim Equation
R
T
DOWN
(kΩ) =
R
T
UP
(kΩ) =
2.49(V
O
– 1.27)
3.3 – V
O
3.16
V
O
– 3.3
–16.9
–16.9
UWR-5/3000-D12A
UWR-5/3000-D24A
UWR-5/3000-D48A
R
T
DOWN
(kΩ) =
R
T
UP
(kΩ) =
R
T
DOWN
(kΩ) =
R
T
UP
(kΩ) =
R
T
DOWN
(kΩ) =
R
T
UP
(kΩ) =
2.49(V
O
– 2.527)
–15
5 – V
O
6.292
V
O
– 5
–15
UWR-12/1250-D12A
UWR-12/1250-D24A
UWR-12/1250-D48A
6.34(V
O
– 5.714)
–49.9
12 – V
O
36.23
V
O
– 12
–49.9
UWR-15/1000-D12A
UWR-15/1000-D24A
UWR-15/1000-D48A
7.87(V
O
– 7.136)
–63.4
15 – V
O
56.16
V
O
– 15
–63.4
Accuracy of adjustment is subject to tolerances or resistor values
and factory-adjusted output accuracy. V
O
= desired output voltage.
4
9 - 1 5 W, S I N G L E O U T P U T D C / D C C O N V E RT E R S
UWR Models
Start-Up Threshold and Undervoltage Shutdown
Under normal start-up conditions, devices will not begin to regulate until the
ramping-up input voltage exceeds the Start-Up Threshold Voltage (35V for
"D48A" models). Once operating, devices will not turn off until the input volt-
age drops below the Undervoltage Shutdown/Lockout limit (34V for "D48A"
models). Subsequent re-start will not occur until the input is brought back
up to the Start-Up Threshold. This built-in hysteresis obviously avoids any
indeterminate on/off situations at a single voltage.
Start-Up Time
The V
IN
to V
OUT
Start-Up Time is the interval between the time at which
a ramping input voltage crosses the turn-on threshold point and the fully-
loaded output voltage enters and remains within its specified accuracy band.
Actual measured times will vary with input source impedance, external input
capacitance, and the slew rate and final value of the input voltage as it
appears to the converter.
The On/Off to V
OUT
Start-Up Time assumes the converter is turned off via
the On/Off Control with the nominal input voltage already applied to the
converter. The specification defines the interval between the time at which the
converter is turned on and the fully-loaded output voltage enters and remains
within its specified accuracy band.
15.0
13.5
12.0
10.5
D24A Temperature Derating Curves for 5V, 12V and 15V Output Models
V
IN
= 18V-27V
Output Power (Watts)
9.0
7.5
V
IN
= 18V-30V
V
IN
= 18V-36V
6.0
4.5
3
1.5
0
–40
0
40
45
50
55
60
65
70
75
80
85
90
95
100
Ambient Temperature (°C)
D24A and D48A Temperature Derating Curves for 3.3V Output Models
14
V
IN
= 18V-27V (D24A)
V
IN
= 36V-48V (D48A)
12
10
Output Power (Watts)
TEMPERATURE DERATING
V
IN
= 18V-30V (D24A)
8
V
IN
= 36V-60V (D48A)
The thermal performance of A-Series UWR 15 Watt DC/DC Converters is
depicted in the derating curves shown below. All devices, when operated at
full load, in still ambient air, over their full specified input voltage range, can
safely operate to +60°C. All models, other than the D12A models (10-18 Volt
input range), can operate at higher ambient temperatures if the input range
is narrowed. For example, model UWR-5/3000-D48A can operate safely to
+70°C if the input range is kept between 36 and 48 Volts. Contact DATEL's
Applications Engineering Group if you need additional details.
6
V
IN
= 18V-36V (D24A)
V
IN
= 36V-75V (D48A)
4
2
0
–40
0
40
45
50
55
60
65
70
75
80
85
90
95
100
Ambient Temperature (°C)
D12A (10-18V) Temperature Derating Curves
15.0
13.5
V
OUT
= 5V, 12V and 15V
12.0
10.5
12.0
10.5
15.0
D48A Temperature Derating Curves for 5V, 12V and 15V Output Models
V
IN
= 36V-48V
13.5
Output Power (Watts)
Output Power (Watts)
9.0
7.5
V
OUT
= 3.3V
6.0
4.5
3
1.5
0
–40
0
40
45
50
55
60
65
70
75
80
85
90
95
100
9.0
7.5
V
IN
= 36V-60V
V
IN
= 36V-75V
6.0
4.5
3
1.5
0
–40
0
40
45
50
55
60
65
70
75
80
85
90
95
100
Ambient Temperature (°C)
Ambient Temperature (°C)
5
Analog electronics
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