®
®
INNOVATION and EXCELLENCE
Single Output
A-Series, UWR Models
A-SERIES
High-Reliability, 2" x 2"
14-20 Watt, DC/DC Converters
Features
•
Low cost! Highly reliable!
•
Proven SMT-on-pcb construction
•
Qual tested; HALT tested; EMC tested
•
Designed to meet UL/ EN60950,
BASIC insulation (D48A models)
•
mark available (48V
IN
models)
•
Output voltages: 3.3/5/5.2/12/15 Volts
•
Ultra-wide input voltage ranges:
4.7-7.5V, 9-36V or 18-75V
•
Small packages, 2" x 2" x 0.45"
•
Industry-standard pinouts
•
Fully isolated, 1500Vdc guaranteed
•
Guaranteed efficiencies to 84%
•
–40 to +100°C operating temperature
•
Modifications and customs for OEM’s
DATEL's new A-Series switching DC/DC converters are designed to meet
the demanding long-term-reliability and low-cost requirements of modern telecom,
datacom, computer/networking and industrial-electronics applications. These highly-
efficient, rugged devices combine straightforward circuit topologies, new components,
proven SMT-on-pcb construction methods, and highly repeatable automatic-assembly
techniques. The flexibility of the designs and their assembly methods readily permit
minor modifications to optimize performance for specific applications.
The single-output, 14-20 Watt Models of the A-Series deliver both high power
densities and impressive MTBF’s. Their superior durability is substantiated by a
rigorous in-house qualification program including HALT (Highly Accelerated Life Test-
ing), which is designed to detect any potential electrical, mechanical, or process
weaknesses.
Packaged in standard, 2" x 2" x 0.45", shielded metal cases with non-conductive
coatings, these fully isolated (1500Vdc minimum) DC/DC’s offer excellent line/load
regulation, full I/O protection, thermal shutdown, and industry-standard pinouts.
Output voltages include 3.3, 5, 5.2, 12 or 15 Volts. Input voltage ranges are
DATEL's traditional ultra-wide 9-36V and 18-75V, as well as 4.7-7.5V. Each device
provides remote on/off control and V
OUT
trim capability. All A-Series UWR models are
fully EMI characterized and UL1950, CSA 950 and IEC 950 safety approved.
A-Series DC/DC’s are extremely reliable, easy-to-use, cost-effective power con-
verters. Use them to improve the reliability of existing equipment or to develop
new systems that exceed design objectives.
+V
IN
(1)
+V
OUT
(6)
COMMON
(7)
–V
IN
(2)
ON/OFF
CONTROL
(4)
PWM
CONTROLLER
OPTO
ISOLATION
REFERENCE &
ERROR AMP
+V
OUT
TRIM
(8)
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
1 4 - 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
Performance Specifications and Ordering Guide
Output
Model
UWR-3.3/4250-D5A
UWR-3.3/4850-D12A
UWR-3.3/4850-D48A
UWR-5/3000-D5A
UWR-5/4000-D12A
UWR-5/4000-D48A
UWR-5/4000-D48E
➄
UWR-5.2/3000-D5A
UWR-12/1250-D5A
UWR-12/1650-D12A
UWR-12/1650-D48A
UWR-15/1000-D5A
UWR-15/1300-D12A
UWR-15/1300-D48A
➀
Input
Regulation (Max.)
Line
±1.0%
±0.5%
±1.0%
±1.0%
±0.3%
±0.3%
±0.3%
±1.0%
±1.0%
±0.3%
±0.3%
±1.0%
±0.3%
±0.3%
V
OUT
(Volts)
3.3
3.3
3.3
5
5
5
5
5.2
12
12
12
15
15
15
I
OUT
(mA)
4250
4850
4850
3000
4000
4000
4000
3000
1250
1650
1650
1000
1300
1300
R/N (mVp-p)
➁
Typ.
Max.
50
50
50
50
50
50
50
50
75
50
75
75
50
75
100
75
100
100
100
100
100
100
120
100
100
150
100
100
Load
➂
±1.0%
±1.0%
±1.0%
±1.0%
±0.5%
±0.5%
±0.5%
±1.0%
±1.0%
±0.5%
±0.5%
±1.0%
±0.5%
±0.5%
V
IN
Nom.
(Volts)
5
24
48
5
24
48
48
5
5
24
48
5
24
48
Range
(Volts)
4.7-7.5
9-36
18-75
4.7-7.5
9-36
18-75
36-72
4.7-7.5
4.7-7.5
9-36
18-75
4.7-7.5
9-36
18-75
I
IN
➃
(mA)
80/3720
35/852
15/419
80/3800
15/1020
15/496
15/484
80/3900
80/3660
15/1000
15/491
80/3660
20/967
10/484
Efficiency
Min.
76%
77%
79%
78%
81%
82%
84%
79%
80%
79.5%
84%
80%
84%
84%
Typ.
77%
79%
80%
79%
82%
84%
86%
80%
82%
82.5%
85%
82%
85%
86%
Package
(Case,
Pinout)
C4, P6
C4, P6
C4, P6
C4, P6
C4, P6
C4, P6
C4, P6
C4, P6
C4, P6
C4, P6
C4, P6
C4, P6
C4, P6
C4, P6
➀
Typical at T
A
= +25°C under nominal line voltage and full-load conditions unless otherwise noted.
➁
Ripple/Noise (R/N) measured over a 20MHz bandwidth.
➂
10% to 100% load.
PA R T N U M B E R S T R U C T U R E
➃
Nominal line voltage, no-load/full-load conditions.
➄
See Technical Notes for an explanation of trading off input voltage ranges for higher full-power
operating temperature.
M E C H A N I C A L S P E C I F I C AT I O N S
U WR
-
5
/
4000
-
D12 A
2.00
(50.80)
Output Configuration:
U
= Unipolar
Wide Range Input
Nominal Output Voltage:
3.3, 5, 12 or 15 Volts
A-Series
High Reliability
Input Voltage Range:
D5
= 4.7-7.5 Volts (5V nominal)
D12
= 9-36 Volts (24V nominal)
D48
= 18-75/36-72 Volts (48V nominal)
Maximum Output Current
in mA
0.45
(11.43)
METAL CASE
Case C4
INSULATED BASE
0.20 MIN
(5.08)
0.040 ±0.002 DIA.
(1.016 ±0.051)
1.800
(45.72)
0.10
(2.54)
T E M P E R AT U R E D E R AT I N G
0.200
(5.08)
5
20
18
16
E
BB
G
6
1
2
7
4
8
0.40
(10.16)
1.200
(30.48)
3 EQ. SP. @
0.400 (10.16)
2.00
(50.80)
D
D, E, F
F
A
AA
C
BB, G
0.400
(10.16)
Output Power (Watts)
14
12
10
8
6
4
2
0
–40
0
UWR-3.3/4250-D5A
UWR-3.3/4850-D12A
UWR-3.3/4850-D48A
UWR-5/3000-D5A
UWR-5/4000-D12A
UWR-5/4000-D48A
UWR-5/4000-D48E
UWR-5.2/3000-D5A
UWR-12/1250-D5A
UWR-12/1650-D12A
UWR-12/1650-D48A
UWR-15/1000-D5A
UWR-15/1300-D12A
UWR-15/1300-D48A
40
45
F
A
A
E
C
B
G
D
E
C
B
E
C
B
50
55
60
65
70
B
0.100
(2.54)
BOTTOM VIEW
DIMENSIONS ARE IN INCHES (MM)
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 "D5A" and "D12A" models,
the case is connected to
pin 2 (–V
IN
).
For "D48A" and "D48E" models, the case
is connected to pin 1 (+V
IN
).
75
80
85
90
95
100
Ambient Temperature (°C)
Notes:
1. The UWR-3.3/4850-D48A (18-75V input, curve A) and UWR-3.3/4850-D12A (9-36V input,
curve A) will derate curve AA if used over the limited input ranges of 20-60V or 10-30V,
respectively.
2. "D48A" models (18-75V input ranges) that derate along curve B will derate along curve BB
if used over the more limited input range of 24-60V.
2
1 4 - 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
UWR Models
Performance/Functional Specifications
Typical @ T
A
= +25°C under nominal line voltage and full-load conditions, unless noted.
➀
Input
Input Voltage Range:
D5A Models
D12A Models
D48A/D48E Models
Input Current
Input Filter Type
➁
Overvoltage Shutdown:
D5A Models
D12A Models
D48A and /D48E Models
Reverse-Polarity Protection
On/Off (Sync.) Control
(Pin 4)
➂
V
OUT
Accuracy
(50% load)
Temperature Coefficient
Ripple/Noise
(20MHz BW)
➁
Line/Load Regulation
Efficiency
Isolation Voltage
➃
Isolation Capacitance
Current Limiting
Overvoltage Protection
Transient Response
(50% load step)
Switching Frequency
Operating Temperature
(Ambient):
Without Derating
With Derating
Storage Temperature
Dimensions
Shielding
Case Connection:
D5A, D12A Models
D48A, D48E Models
Case Material
4.7-7.5 Volts (5V nominal)
9-36 Volts (24V nominal)
18-75/36-72 Volts (48V nominal)
See Ordering Guide
Pi (C-type for D5A models)
10 Volts
40 Volts
80 Volts
Yes (Instantaneous, 10A maximum)
TTL high = off, low (or open) = on
Absolute Maximum Ratings
Input Voltage:
"D5A" Models
"D12A" Models
"D48A" and "D48E" Models
Input Reverse-Polarity Protection
Output Overvoltage Protection:
3.3V Outputs
5V/5.2V Outputs
12V Outputs
15V Outputs
Output Current
11 Volts
44 Volts
88 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 are model
dependent
–40 to +105°C
+300°C
Output
±1%, maximum
±0.02% per °C
See Ordering Guide
See Ordering Guide
See Ordering Guide
1500Vdc guaranteed
550pF
Auto-recovery
Zener/transorb clamp, magnetic feedback
TECHNICAL NOTES
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
200µsec max. to ±1.5% of final value
165kHz (±15kHz)
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 A-Series UWR 14-20 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
D5A Models
D12A Models
D48A Models
To Reduce Output Ripple
3.3V Outputs
5V/5.2V Outputs
12/15V Outputs
47µF, 16V
20µF, 50V
20-50µF, 100V
100µF, 6V, Low ESR
47µF, 10V, Low ESR
22µF, 20V, Low ESR
Environmental
–40 to +40/50/55/65°C (Model dependent)
to +100°C (See Derating Curves)
–40 to +105°C
Physical
2" x 2" x 0.45" (51 x 51 x 11.4mm)
5-sided
Pin 2 (–V
IN
)
Pin 1 (+V
IN
)
Corrosion resistant steel with
non-conductive, epoxy-based, black
enamel finish and plastic baseplate
Brass, solder coated
2.7 ounces (76.5 grams)
Pin Material
Weight
➀
These 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
Applying a voltage to the Control pin when no input power is applied to the converter
can cause permanent damage to the converter.
➃
"D48A" models have BASIC, all other models have Functional insulation.
Devices can be screened or modified for higher guaranteed isolation voltages.
Contact DATEL Applications Engineering for details.
➄
Except for 3.3V outputs which have no protection.
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
A Series
1 4 - 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 Fusing
Certain applications and/or safety agencies may require the installation of
fuses at the inputs of power conversion components. For DATEL A-Series
UWR 14-20 Watt DC/DC Converters, you should use slow-blow type fuses
with values no greater than the following:
V
IN
Range
D5A
D12A
D48A/D48E
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 A-Series 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). 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
COMMON
7
8
+OUTPUT
1
+INPUT
TRIM
2
–INPUT
COMMON
6
Fuse Value
6A
4A
2A
8
20kΩ
5-10
TURNS
LOAD
7
Figure 2a. Trim Connections Using a Trimpot
+OUTPUT
6
Trim
Down
LOAD
Trim Up
Figure 2b. Trim Connections Using Fixed Resistors
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. More importantly . . . we’ll do
it on time and within budget!
Our experienced applications and design staffs; quick-turn prototype capabil-
ity; 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.
4
1 4 - 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
UWR Models
Typical Performance Curves
(T
A
= +25°C)
The performance curves below were derived from actual test data for a single
model number (UWR-5/4000-D12A). Since all devices in the 14-20W UWR
A-Series have the same circuit topology, the performance curves are repre-
sentative of all devices.
EFFICIENCY
E M I R A D I AT E D E M I S S I O N S
Efficiency vs. Output Current and Input Voltage
87
84
81
Efficiency (%)
78
V
IN
= 12V
75
V
IN
= 24V
72
V
IN
= 36V
69
If you’re designing with EMC in mind, please note that all of DATEL’s UWR
14-20 Watt A-Series DC/DC Converters have been characterized for radiated
and conducted emissions in our new EMI/EMC laboratory. Testing is con-
ducted 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-5/4000-D12A appear below. Published EMC test reports are
available for each model number. Contact DATEL's Applications Engineering
Department for more details.
UWR-5/4000-D12A Radiated Emissions
FCC Part 15 Class B, 3 Meters
Converter Output = 5Vdc @ 3.6A
80
70
60
Radiated Emissions (dBµV/M)
FCC Class B Limit
66
63
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
5V Output Current (Amps)
50
40
30
20
10
0
L I N E R E G U L AT I O N
Output Voltage vs. Input Voltage and Output Current
5.015
I
OUT
= 1A
5.010
5.005
V
OUT
(Volts)
5.000
I
OUT
= 2A
4.995
Radiated Emissions
–10
–20
100
1000
Frequency (MHz)
UWR-5/4000-D12A Radiated Emissions
EN 55022 Class B, 10 Meters
Converter Output = +5Vdc @ 3.6A
80
4.990
70
4.985
4.980
4.975
9
12
15
18
21
24
27
30
33
36
V
IN
(Volts)
Radiated Emissions (dBµV/M)
I
OUT
= 4A
60
50
EN 55022 Class B Limit
40
30
20
10
0
L OA D R E G U L AT I O N
Output Voltage vs. Output Current and Input Voltage
5.015
V
IN
= 12V
5.010
5.005
V
OUT
(Volts)
5.000
4.995
4.990
V
IN
= 36V
4.985
4.980
4.975
0.5
V
IN
= 24V
–10
–20
100
Radiated Emissions
1000
Frequency (MHz)
1.0
1.5
2.0
2.5
3.0
3.5
4.0
5V Output Current (Amps)
5
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
