DATASHEET
Rev. B
LTW SERIES
4:1 Ultra Wide Input Voltage Ranges
Triple Outputs
2.0 x 2.0 x 0.52 Inch Package
15W DC/DC Power Converters
FEATURES
•
Triple Outputs
•
RoHS Compliant
•
4:1 Ultra Wide Input Voltage Ranges
•
15 Watts Output Power
•
Efficiency up to 80%
•
100% Burn-in Tested
•
Short Circuit Protection
•
Remote ON/OFF Control
•
Six-Sided Shielding
•
2.0 x 2.0 x 0.52 Inch Package
APPLICATIONS
•
Wireless Networks
•
Telecom / Datacom
•
Measurement Equipment
•
Industry Control Systems
•
Semiconductor Equipment
•
1500VDC I/O Isolation
•
Wide Operating Temperature Range: -40°C to +85°C
•
MTBF > 1,500,000 Hours
•
UL 94V-0 Package Material
•
UL60950-1 Approvals
•
Custom Solutions Available
DESCRIPTION
The LTW series of DC/DC power converters provides 15 Watts of continuous output power in a 2.0” x 2.0” x
0.52” package. This series has triple output models with 4:1 ultra wide input voltage ranges of 9-36VDC and 20-
72VDC. Some features include 1500VDC I/O isolation, remote ON/OFF control, six-sided shielding, efficiency
up to 80%, and short circuit protection. This series is RoHS compliant and has UL 60950-1 safety approvals.
These units are well suited for use in wireless networks, telecom/datacom applications, measurement equipment,
industry control systems, and semiconductor equipment. All models are 100% burn-in tested.
08/26/2014
Wall Industries, Inc. 37 Industrial Drive Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 1 of 4
Rev. B
LTW Series
15 Watts
Triple Outputs
DC/DC Power Converters
SPECIFICATIONS: LTW 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
INPUT SPECIFICATIONS
Input Voltage Range
Input Filter
Remote ON/OFF
OUTPUT SPECIFICATIONS
Output Voltage
TEST CONDITIONS
24VDC nominal input models
48VDC nominal input models
Min
9
20
Nom
24
48
Max
36
72
Unit
VDC
capacitor
yes
See Table
5VDC output, Io=1.5A
±5
±2
±2
±0.2
±1.0
0
20MHz Bandwidth
50% load step change
350
Continuous, automatic recovery
80
100
(2sec/0.5mA)
500VDC
With derating (see derating curve)
1500
1000
-40
-40
+85
+100
95
Free air convection
MIL-HDBK-217F at 25°C, ground benign
1,500,000 hours
black coated copper with non-conductive base
Epoxy (UL94V-0 rated)
Six-sided
2.51oz (71.2g)
2.0 x 2.0 x 0.52 inches
(50.8 x 50.8 x 13.2 mm)
EN55022 Class A
EN55022 Class A
UL 60950-1
Wall Industries, Inc. 37 Industrial Drive Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
%
KHz
VDC
M
°C
°C
%
15
See Table
100
mVp-p
µs
%
%
W
%
±12VDC outputs, Io=0.31A
±15VDC outputs, Io=0.25A
25% to 100% full load
low line to high line at full load
Voltage Accuracy
Load Regulation
Line Regulation
Output Power
Output Current
Ripple & Noise
Transient Response Time
PROTECTION
Short Circuit Protection
GENERAL SPECIFICATIONS
Efficiency
Switching Frequency
Isolation Voltage (input to output)
Isolation Resistance (input to output)
ENVIRONMENTAL SPECIFICATIONS
Operating Temperature
Storage Temperature
Humidity (non-condensing)
Cooling
MTBF
PHYSICAL SPECIFICATIONS
Case Material
Potting Material
Shielding
Weight
Dimensions (L x W x H)
SAFETY & EMI
Conducted Emissions
Radiated Emissions
Safety Approvals
08/26/2014
Page 2 of 4
Rev. B
LTW Series
15 Watts
Triple Outputs
DC/DC Power Converters
MODEL SELECTION TABLE
Model Number
Vo
1
LTW2412-15EI
Vo
2
Vo
3
Vo
1
Vo
2
Vo
3
Vo
1
Vo
2
Vo
3
Vo
1
Vo
2
Vo
3
Input Voltage Range
24 VDC
(9 – 36 VDC)
24 VDC
(9 – 36 VDC)
48 VDC
(20 – 72 VDC)
48 VDC
(20 – 72 VDC)
Output Voltage
5 VDC
+12 VDC
-12 VDC
5 VDC
+15 VDC
-15VDC
5 VDC
+12 VDC
-12 VDC
5 VDC
+15 VDC
-15VDC
Output Current
1.5A
0.31A
0.31A
1.5A
0.25A
0.25A
1.5A
0.31A
0.31A
1.5A
0.25A
0.25A
15W
Output Power
LTW2415-15EI
15W
LTW4812-15EI
15W
LTW4815-15EI
15W
APPLICATIONS
Test Circuit
100uF/25V
+Vin
Cin
GND
100uF/25V
24V & 48V:Cin 100uF,100V
Recommended Filter for EN55022 Class A Compliance
12uH
+Vo1
L
C1
C2
+Vin
+Vout
Triple
+Vo2
Cout
Cout
COM
+Vo3
DC/DC
Converter
-Vin
-Vout
Load
47uF
33uF
GRAPHS
Derating Curve
100
120
Tolerance
Output Power (%)
Output Voltage (%)
75
85 100
110
100
90
80
70
75
50
25
0
-40
Natural Convection
10 20
30 40 50 60 70 80 90 100 110 120
Ambient Temperature (°C)
Wall Industries, Inc. 37 Industrial Drive Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Output Current (%)
08/26/2014
Page 3 of 4
Rev. B
LTW Series
15 Watts
Triple Outputs
DC/DC Power Converters
MECHANICAL DRAWING
Unit: inches (mm)
0.52 max
(13.2) max
Heatsink Surface
PIN CONNECTIONS
0.016 (0.4)
Pin
1
2
4
5
6
Triple
+Vin
-Vin
Control
Vo
2
Vo
1
COM
Vo
3
0.008±0.004 (0.2±0.1)
0.24±0.024 (6.1±0.61)
0.04±0.002 (1.0±0.05)
(Pin length is taken from bottom
of standoff to bottom of pin)
0.90 (22.86)
Ø0.08±0.004 (Ø2±0.1) x 4
0.40
0.40
0.40
(10.16) (10.16) (10.16)
5
7
8
2.0 (50.8)
0.20 (5.08)
1
2
4
0.40
(10.16)
BOTTOM
VIEW
6
7
8
0.10 (2.54)
2.0 (50.8)
Tolerance: X.X±0.02 (XX.X±0.5)
X.XX±0.01 (XX.XX±0.25)
0.10 (2.54)
NOTES
1. All case and pin to case are for reference only
unless otherwise noted.
2. P.C. pins: 0.04 (1.0) dia x 0.26 (6.60) long.
3. Pin to Pin Tolerance: ±0.01 (0.25)
Pin Diameter Tolerance: ±0.002 (0.05)
4. 10% minimum load required.
5. Remote pin can be left floating if not used.
6. Significant capacitive load on output may inhibit
start-up and operation.
7. All DC/DC converters should be externally fused
on the front end for protection.
COMPANY INFORMATION
Wall Industries, Inc. has created custom and modified units for over 50 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:
(603)778-2300
(888)587-9255
(603)778-9797
sales@wallindustries.com
www.wallindustries.com
37 Industrial Drive
Exeter, NH 03833
08/26/2014
Wall Industries, Inc. 37 Industrial Drive Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 4 of 4
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