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DMW Ultra Wide Series
Single and Dual Output
4:1 Ultra Wide Input Voltage Range
Up to 15.3 Watts DC/DC Converters
Rev C
FEATURES
● 1500VDC Isolation
● Six-Sided Shielding
● Efficiency up to 86%
● MTBF > 700,000 Hours
● Internal SMT Construction
● 4:1 Ultra Wide Input Range
● UL 94V-0 Package Material
● UL60950-1 Safety Approval
● Complies with EN55022 Class A
● Positive Remote On/Off Control (Optional)
DESCRIPTION
The DMW series of DC/DC converters provide up to 15 watts in a 2 x 1 x 0.4 inch package. These converters operate over 4:1 wide input voltage ranges of 9-36VDC
and 18-75VDC. This series also has single and dual output models available. These converters feature efficiency up to 86%, positive remote ON/OFF (optional),
six-sided shielding, 1500VDC isolation, and short circuit protection. This series is ideal for data communication equipment, mobile battery driven equipment,
process/machine control equipment, telecommunication equipment, computer peripheral systems, distributed power systems, mixed analog/digital subsystems, and
industrial robot systems. The EN55022 Class A conducted noise compliance minimizes design time, cost, and eliminates the need for external filter components.
SPECIFICATIONS: DMW Ultra Wide Series
All specifications are based on 25°C, Nominal Input Voltage, and Maximum Output Current unless otherwise noted.
We reserve the right to change specifications based on technological advances.
SPECIFICATION
TEST CONDITIONS
Min
Nom
Max
Unit
24V nominal input models
48V nominal input models
24V nominal input models
48V nominal input models
24V nominal input models
48V nominal input models
9
18
8
15
7
13
24
48
8.5
17
8
15
24V nominal input models
48V nominal input models
-0.7
-0.7
36
75
9
18
8.5
17
1
3500
50
100
VDC
VDC
VDC
VDC
VDC
VDC
A
mW
VDC
VDC
INPUT (Vin)
Operating Voltage Range
Start Voltage
Under Voltage Shutdown
Reverse Polarity Input Current
Short Circuit Input Power
Input Surge Voltage (1000ms)
Input Filter
OUTPUT (Vo)
Output Voltage Range
Output Voltage Accuracy
Output Voltage Balance
Load Regulation
Line Regulation
Output Power
Output Current Range
Ripple & Noise (peak to peak)
Ripple & Noise (peak to peak)
Ripple & Noise
Transient Recovery Time (See Note 1)
Transient Response Deviation
POSITIVE REMOTE ON/OFF (See Note 5)
Supply On
Supply Off
Standby Input Current
Control Input Current (On)
Control Input Current (Off)
Control Common
PROTECTION
Over Power Protection
Short Circuit Protection
Input Fuse Recommendation
GENERAL
Efficiency
Switching Frequency
Isolation Voltage Rated
Isolation Voltage Test
Isolation Resistance
Isolation Capacitance
Internal Power Dissipation
ENVIRONMENTAL
Operating Temperature (Ambient)
Operating Temperature (Case)
Storage Temperature
Lead Temperature
Humidity
Cooling
RFI
Temperature Coefficient
MTBF
Conducted EMI
PHYSICAL
Weight
Dimensions
Case Material
Flammability
02/24/2010
Pi Filter
See Table
±1.0
±2.0
±0.5
±2.0
±0.5
±1.0
±0.1
±0.5
15
See Table
55
80
100
15
300
500
±2
±4
Dual Output, Balanced Loads
Io = 10% to 100%
Vin = min. to max.
20MHz bandwidth
Over Line, Load, and Temperature
25% load step change
25% load step change
-0.7
Vin – RC = 5.0V
Vin – RC = 0V
290
1500
1650
1000
%
See Table
330
400
1200
-40
-40
-50
MIL-HDBK-217F @ 25°C, Ground Benign
VDC
mA
mA
mA
Continuous
2500mA Slow-Blow Type
1250mA Slow-Blow Type
24V nominal input models
48V nominal input models
1.5mm from case for 10 seconds
mVpk-pk
mVpk-pk
mVrms
μs
%
2.5 to 5.5VDC or Open Circuit
0.8
10
50
-1
Referenced to negative input
120
60 seconds
Flash Test for 1 second
500VDC
100KHz, 1V
%
%
%
%
W
1500
5,000
KHz
VDC
VDC
MΩ
pF
mW
+60
°C
+100
°C
+125
°C
260
°C
95
%
Free air convection
Six-sided shielding, metal case
±0.01
±0.02
%/°C
700,000 hours
EN55022 Class A
1.13oz (32g)
2.0 x 1.0 x 0.4 inches (50.8 x 25.4 x 10.2 mm)
Metal with non-conductive baseplate
UL94V-0
Wall Industries, Inc. 37 Industrial Drive Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 1 of 6
DMW Ultra Wide Series
Single and Dual Output
4:1 Ultra Wide Input Voltage Range
Up to 15.3 Watts DC/DC Converters
Rev C
MODEL SELECTION TABLE
Model Number
Input Voltage
Output
Voltage
Output Current
Min
Max
300mA
3000mA
DMW24S3.3-3000
3.3 VDC
DMW24S5-3000
DMW24S5.1-3000
DMW24S12-1250
DMW24S15-1000
DMW24D5-1500
DMW24D12-625
5 VDC
5.1 VDC
12 VDC
15 VDC
±5 VDC
±12 VDC
300mA
300mA
125mA
100mA
±150mA
±62.5mA
3000mA
3000mA
1250mA
1000mA
±1500mA
±625mA
±15 VDC
3.3 VDC
5 VDC
5.1 VDC
12 VDC
15 VDC
±50mA
300mA
300mA
300mA
125mA
100mA
±500mA
3000mA
3000mA
3000mA
1250mA
1000mA
±5 VDC
±12 VDC
±15 VDC
±150mA
±62.5mA
±50mA
±1500mA
±625mA
±500mA
DMW24D15-500
DMW48S3.3-3000
DMW48S5-3000
DMW48S5.1-3000
DMW48S12-1250
DMW48S15-1000
24 VDC
(9 ~ 36 VDC)
48 VDC
(18 ~ 75 VDC)
DMW48D5-1500
DMW48D12-625
DMW48D15-500
Input Current
Reflected
No Load
Max Load Ripple Current
528mA
25mA (typ)
15mA (typ)
762mA
735mA
726mA
771mA
735mA
726mA
40mA (typ)
787mA
26mA
381mA
368mA
363mA
386mA
30mA (typ)
368mA
363mA
393mA
Output
Power
Efficiency
(Typ)
Max Capacitive
Load
9.9W
78%
470μF
15W
15.3W
15W
15W
15W
15W
82%
81%
85%
86%
81%
85%
470μF
470μF
470μF
470μF
220μF
220μF
15W
9.9W
15W
15.3W
15W
15W
86%
78%
82%
81%
85%
86%
220μF
470μF
470μF
470μF
470μF
470μF
15W
15W
15W
81%
85%
86%
220μF
220μF
220μF
NOTES
1. Transient recovery time is measured to within 1% error band for a step change in output load of 75% to 100%.
2. The DMW series requires a minimum output load to maintain specified regulations. Operation under no-load condition will not damage these devices;
however they may not meet all listed specifications.
3. All DC/DC converters should be externally fused at the front end for protection.
4. Other input and output voltages may be available, please contact factory.
5. Only positive control logic remote On/Off is available. To order the converter with positive remote on/off add the suffix “RC” to the part number.
6. To order the converter with EN55022 Class A function, please add the suffix “A” to the part number.
7. To order the converter with a heatsink please add the suffix “HS” to the part number.
*Due to advances in technology, specifications subject to change without notice.
BLOCK DIAGRAMS
Single Output
Dual Output
+Vo
LC
Filter
+Vin
+Vin
+Vo
LC
Filter
Com.
-Vo
PWM
-Vin
Isolation
-Vo
Ref.Amp
-Vin
PWM
Isolation
Ref.Amp
INPUT VOLTAGE TRANSIENT RATING
130
125
120
115
110
48VDC Input Models
100
~
Vin (VDC)
105
80
75
70
65
24VDC Input Models
60
55
50
45
40
10µs
02/24/2010
100µs
1ms
10ms
100ms
Wall Industries, Inc. 37 Industrial Drive Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 2 of 6
DMW Ultra Wide Series
Single and Dual Output
4:1 Ultra Wide Input Voltage Range
Up to 15.3 Watts DC/DC Converters
Rev C
Efficiency vs Input Voltage (Dual Output)
100
100
90
90
Efficiency (%)
Efficiency (%)
Efficiency vs Input Voltage (Single Output)
80
70
60
80
70
60
50
50
Low
Nom
Low
High
Nom
Input Voltage (V)
Efficiency vs Output Load (Single Output)
Efficiency vs Output Load (Dual Output)
90
90
80
80
Efficiency (%)
Efficiency (%)
High
Input Voltage (V)
70
60
70
60
50
50
40
40
30
30
10
20
40
60
80
100
10
20
40
Load Current (%)
Load Current (%)
Derating Curve without Heatsink
Derating Curve with Heatsink
100
100
400LFM
400LFM
100LFM
100LFM
200LFM
80
200LFM
Output Power (%)
Output Power (%)
80
60
Natural
Convection
40
~
-40
Natural
Convection
60
40
20
20
0
~
0
50
60
70
80
90
100
110
-40
50
Ambient Temperature (°C)
02/24/2010
100
80
60
Wall Industries, Inc. 37 Industrial Drive Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
60
70
80
90
100
110
Ambient Temperature (°C)
Page 3 of 6
DMW Ultra Wide Series
Single and Dual Output
4:1 Ultra Wide Input Voltage Range
Up to 15.3 Watts DC/DC Converters
Rev C
MECHANICAL DRAWING
STANDARD
WITH HEATSINK
Unit: inches (mm)
Unit: inches (mm)
0.402 (10.20)
0.1 (2.5)
0.91 (23.0)
0.402 (10.20)
4
5
0.14 (3.5) x 4
2
Side
2.00 (50.8)
0. 800 (20. 30)
Bottom
1
Ø 0. 039 (Ø 1.00)
3
6
0.68 (17.2) max
0. 60 (15. 2)
1.22 (31.0) max
Heatsink
Thermal Pad
0.200 (50.8)
Clamp
0.40 (10.2)
Converter
0.40 (10.2)
0.24 (6.0)
1.00 (25.4)
1. Tolerance: X.XX±0.01 (X.X±0.25)
X.XXX±0.005 (X.XX±0.13)
Heatsink Specifications
2. Pin: ±0.002 (±0.05)
Heatsink Material: Aluminum
1. Tolerance: X.XX±0.01 (X.X±0.25)
X.XXX±0.005 (X.XX±0.13)
2. Pin: ±0.002 (±0.05)
Finish: Anodic treatment (black)
Weight: 0.07oz (2g)
PIN CONNECTIONS
Pin
Single Output
Dual Output
1
+Vin
+Vin
The Advantages of adding a Heatsink:
2
-Vin
-Vin
3
+Vout
+Vout
1. To help heat dissipation and increase the stability and reliability of DC/DC
converters at high operating temperature atmosphere.
4
No Pin
Common
5
-Vout
-Vout
6
2. To upgrade the operating temperature of DC/DC converters, please refer
to the Derating Curve.
*Positive Remote ON/OFF (Optional)
*Add the suffix “RC” to the part number for Remote On/Off option
The DMW Series converter is encapsulated in a low thermal resistance molding compound that has excellent resistance/electrical characteristics over a
wide temperature range or in high humidity environments. The encapsulant and unit case are both rated to UL 94V-0 flammability specifications. Leads
are tin plated for improved solderability.
02/24/2010
Wall Industries, Inc. 37 Industrial Drive Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 4 of 6
DMW Ultra Wide Series
Single and Dual Output
4:1 Ultra Wide Input Voltage Range
Up to 15.3 Watts DC/DC Converters
Rev C
DESIGN & FEATURE CONSIDERATIONS
Remote On/Off
Positive logic remote on/off turns the module on during a logic high voltage on the remote on/off pin, and off during a logic low. To turn the power module on
and off, the user must supply a switch to control the voltage between the on/off terminal and the -Vin terminal. The switch can be an open collector or
equivalent.
A logic low is -0.7V to 0.8V.
A logic high is 2.5V to 5.5V.
The maximum sink current at on/off terminal during a logic low is -1mA. The maximum allowable leakage current of the switch at on/off terminal (2.5 to
5.5V) is 50µA.
Over Current Protection
To provide protection in a fault (output overload) condition, the unit is equipped with internal current limiting circuitry and can endure current limiting for an
unlimited duration. At the point of current-limit inception, the unit shifts from voltage control to current control. The unit operates normally once the output
current is brought back into its specified range.
Input Source Impedance
The power module should be connected to a low ac-impedance input source. Highly inductive source impedances can affect the stability of the power
module. In applications where power is supplied over long lines and output loading is high, it may be necessary to use a capacitor at the input to ensure
startup. A capacitor mounted close to the power module helps ensure stability of the unit, it is recommended to use a good quality low Equivalent Series
Resistance (ESR < 1.0Ω at 100KHz) capacitor of a 6.8µF for the 24V and 48V input devices.
+
+Vin
+Out
+
DC Power
Source
DC / DC Converter
Load
Cin
-Vin
-
-Out
Maximum Capacitive Load
The DMW series has a limitation of maximum connected capacitance at the output. The power module may be operated in current limiting mode during
start-up, affecting the ramp-up and the startup time. For optimum performance we recommend 220µF maximum capacitive load for dual outputs and 470µF
capacitive load for single outputs. The maximum capacitance can be found in the Model Selection Guide.
TEST CONFIGURATIONS
Input Reflected-Ripple Current Test Setup
Input reflected-ripple current is measured with an inductor Lin (4.7µH) and Cin (220µF, ESR < 1.0Ω at 100KHz) to simulate source impedance.
Capacitor Cin offsets possible battery impedance.
Current ripple is measured at the input terminals of the module. Measurement bandwidth is 0-500 KHz.
To Oscilloscope
+
Battery
+
+Vin
Lin
Current
Probe
+Out
DC / DC
Converter
Load
Cin
-Vin
-Out
Peak-to-Peak Output Noise Measurement Test
Use a Cout 0.47µF ceramic capacitor.
Scope measurement should be made by using a BNC socket; measurement bandwidth is 0-20 MHz. Position the load between 50 mm and 75 mm from the
DC/DC converter.
+Vin
+Out
Single Output
DC / DC
Converter
-Vin
02/24/2010
Cout
-Out
+Vin
Copper Strip
Copper Strip
Resistive
Scope
Load
+Out
Copper Strip
Cout
Dual Output
DC / DC
Converter
Com.
Copper Strip
-Vin
-Out
Copper Strip
Cout
Wall Industries, Inc. 37 Industrial Drive Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Scope
Resistive
Load
Scope
Page 5 of 6
DMW Ultra Wide Series
Single and Dual Output
4:1 Ultra Wide Input Voltage Range
Up to 15.3 Watts DC/DC Converters
Rev C
Output Ripple Reduction
A good quality low ESR capacitor placed as close as possible across the load will give the best ripple and noise performance. To reduce output ripple, it is
recommended to use 4.7µF capacitors at the output.
+
+Vin
Single Output
DC / DC
Converter
DC Power
Source
-
+
-Vin
+Vin
Cout
Load
-Out
+Out
Dual Output
DC / DC Com.
Converter
DC Power
Source
-
+Out
-Vin
Cout
Load
Load
Cout
-Out
Thermal Considerations
Many conditions affect the thermal performance of the power module, such as orientation, airflow over the module, and board spacing. To avoid exceeding
the maximum temperature rating of the components inside the power module, the case temperature must be kept below 100°C. The derating curves are
determined from measurements obtained in an experimental apparatus.
Position of air velocity
probe and thermocouple
50mm / 2in
15mm / 0.6in
Air Flow
DUT
COMPANY INFORMATION:
Wall Industries, Inc. has created custom and modified units for over 40 years. Our in-house research and development engineers will provide a solution that
exceeds your performance requirements on time and on budget. Our ISO9001-2008 certification is just one example of our commitment to producing a high
quality, well documented product for our customers.
Our past projects demonstrate our commitment to you, our customer. Wall Industries, Inc. has a reputation for working closely with its customers to ensure
each solution meets or exceeds form, fit and function requirements. We will continue to provide ongoing support for your project above and beyond the
design and production phases. Give us a call today to discuss your future projects.
Contact Wall Industries for further information:
Phone:
Toll Free:
Fax:
E-mail:
Web:
Address:
02/24/2010
(603)778-2300
(888)587-9255
(603)778-9797
sales@wallindustries.com
www.wallindustries.com
5 Watson Brook Rd.
Exeter, NH 03833
Wall Industries, Inc. 37 Industrial Drive Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 6 of 6