DC-DC Converter UNIT
LW Series
( 5 W WIDE INPUT RANGE DC-DC CONVERTER )
FEATURES
5W DIL PACKAGE
4.5-9,9-18V,18-36V,36-72V WIDE
INPUT RANGE
SHORT CIRCUIT PROTECTION
LOW COST
NO EXTERNAL COMPONENTS
REQUIRED
REGULATED OUTPUT
TYPICAL EFFICIENCY 80%
100% BURNED IN
INDUSTRY STANDARD PACKAGE
MTBF > 800,000 HOURS
OUTPUT SPECIFICATIONS
Voltage Setpoint Accuracy
Temperature Coefficient
Ripple & Noise (20MHz
BW)
Line Regulation
1
2
INPUT SPECIFICATIONS
+/-2% max
+/-0.03%/
O
C
Input Voltage Range
Input Filter
2:1 INPUT RANGE
Pi Network
100mVp-p max
+/-0.2% max
+/-0.2% max
Continuous
Load Regulation
GENERAL SPECIFICATIONS
Efficiency
Isolation Voltage
3
Short Circuit Protection
70% min
1000 VDC min
9
10 ohms min
50 KHz min
800,000 Hours
31.2g Typ
Five-Side Shielded Case
50.8mm*25.4mm*11.2mm
ENVIRONMENTAL SPECIFICATIONS
Operating Temperature
Storage Temperature
Cooling
-25
O
C to +71
O
C
-55
O
C to +125
O
C
Free-Air Convection
Isolation Resistance
Switching Frequency
MTBF
Weight
Case Material
ALL SPECIFICATIONS TYPICAL AT NOMINAL
LINE,
FULL
LOAD
,
AND
25
O
Case Size
C
UNLESS
OTHERWISE NOTED.
1
2
3
High Line to Low Line.
Load Regulation is for output load current change from 10% to 100%.
For 10 seconds
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Page: 1 / 6
Version: 4-Oct-02
DC-DC Converter UNIT
LW Series
( 5 W WIDE INPUT RANGE DC-DC CONVERTER )
SELECTION GUIDE(1)
2:1 5W OUTPUT
MODEL
NUMBER
LWS-0505E
LWS-0512E
LWS-0515E
LWS-1203.3E
LWS-1205E
LWS-1209E
LWS-1212E
LWS-1215E
LWD-1205E
LWD-1209E
LWD-1212E
LWD-1215E
LWS-2403.3E
LWS-2405E
LWS-2409E
LWS-2412E
LWS-2415E
LWD-2405E
LWD-2409E
LWD-2412E
LWD-2415E
LWS-4803.3E
LWS-4805E
LWS-4809E
LWS-4812E
LWS-4815E
LWD-4805E
LWD-4809E
LWD-4812E
LWD-4815E
INPUT
VOLTAGE
(VDC)
4.5-9
4.5-9
4.5-9
9-18
9-18
9-18
9-18
9-18
9-18
9-18
9-18
9-18
18-36
18-36
18-36
18-36
18-36
18-36
18-36
18-36
18-36
36-72
36-72
36-72
36-72
36-72
36-72
36-72
36-72
36-72
OUTPUT
VOLTAGE
(VDC)
5
12
15
3.3
5
9
12
15
+/-5
+/-9
+/-12
+/-15
3.3
5
9
12
15
+/-5
+/-9
+/-12
+/-15
3.3
5
9
12
15
+/-5
+/-9
+/-12
+/-15
OUTPUT
CURRENT
(mA)
1000
417
333
1500
1000
556
417
333
+/-500
+/-278
+/-208
+/-167
1500
1000
556
417
333
+/-500
+/-278
+/-208
+/-167
1500
1000
556
417
333
+/-500
+/-278
+/-208
+/-167
INPUT
4
CURRENT(mA)
FULL
LOAD
1535
1420
1390
589
556
520
519
514
556
525
519
514
290
270
257
254
251
270
257
254
251
135
135
126
126
123
135
126
126
123
NO
LOAD
30
30
20
33
30
30
28
28
29
28
28
28
16
14
14
13
13
14
14
13
12
10
8
7
7
7
8
7
7
7
65
70
72
70
75
80
80
81
75
79
80
81
71
77
81
82
83
77
81
82
83
77
77
83
83
85
77
83
83
85
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
EFF
(%)
5
ISOLATION
(VDC)
Note: Other input to output voltages may be available. Please contact factory.
4
5
NOMINAL INPUT VOLTAGE.
NOMINAL INPUT VOLTAGE,FULL LOAD.
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Page: 2 / 6
Version: 4-Oct-02
DC-DC Converter UNIT
LW Series
( 5 W WIDE INPUT RANGE DC-DC CONVERTER )
SELECTION GUIDE(2)
4:1 5W OUTPUT
MODEL
NUMBER
LWS-1203.3T
LWS-1205T
LWS-1209T
LWS-1212T
LWS-1215T
LWD-1205T
LWD-1212T
LWD-1215T
LWS-2403.3T
LWS-2405T
LWS-2409T
LWS-2412T
LWS-2415T
LWD-2412T
LWD-2415T
INPUT
VOLTAGE
(VDC)
9-36
9-36
9-36
9-36
9-36
9-36
9-36
9-36
18-72
18-72
18-72
18-72
18-72
18-72
18-72
OUTPUT
VOLTAGE
(VDC)
3.3
5
9
12
15
+/-5
+/-12
+/-15
3.3
5
9
12
15
+/-12
+/-15
OUTPUT
CURRENT
(mA)
1500
1000
556
417
333
+/-500
+/-208
+/-167
1500
1000
556
417
333
+/-208
+/-167
INPUT
6
CURRENT(mA)
FULL
LOAD
555
535
548
525
520
530
527
520
277
277
267
260
257
257
257
NO
LOAD
20
30
30
28
28
28
28
28
14
14
14
13
13
13
12
75
78
76
79
80
77
79
80
75
75
78
80
81
81
81
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
EFF
(%)
7
ISOLATION
(VDC)
Note: Other input to output voltages may be available. Please contact factory.
6
7
NOMINAL INPUT VOLTAGE.
NOMINAL INPUT VOLTAGE,FULL LOAD.
www.Power-Systems.de
Page: 3 / 6
Version: 4-Oct-02
DC-DC Converter UNIT
LW Series
( 5 W WIDE INPUT RANGE DC-DC CONVERTER )
SIMPLIFIED SCHEMATIC
SINGLE OUTPUT
+Vin
+Vout
+Vin
DUAL OUTPUT
+Vout
Common
-Vout
-Vin
PFM
CONTROLLER
ISOLATION
REFERENCE
&
ERROR AMP
-Vout
-Vin
PFM
CONTROLLER
ISOLATION
REFERENCE
&
ERROR AMP
MECHANICAL DIMENSIONS
PIN
1
2
3
4
5
SINGLE
+Vin
-Vin
+Vout
NO PIN
-Vout
DUAL
+Vin
-Vin
+Vout
Common
-Vout
www.Power-Systems.de
Page: 4 / 6
Version: 4-Oct-02
DC-DC Converter UNIT
LW Series
( 5 W WIDE INPUT RANGE DC-DC CONVERTER )
TYPICAL APPLICATIONS
SINGLE OUTPUT
INPUT
+Vin
+Vout
DUAL OUTPUT
INPUT
+Vin
+Vout
OUTPUT
OUTPUT
LOAD1
DC-DC
CONVERTER
-Vin
-Vout
LOAD
DC-DC
CONVERTER
-Vin
Common
LOAD2
-Vout
TEMPERATURE
DERATING
OUTPUT POWER(%)
125%
100%
75%
50%
25%
0%
-25
0
25
50
70
100
RECOMMENDED
FOOTPRINT DETAILS
SAFE
OPERATING
AREA
TA(degree C)
LW SERIES APPLICATION NOTES:
EXTERNAL CAPACITANCE REQUIREMENTS:
No external capacitance is required for operation of the LW series.
To meet the reflected ripple requirements of the converter, an input impedance of less than 0.5 ohm
from DC to 100KHz is required.
External output capacitance is not required for operation, however it is recommended that 10uF
tantalum and 0.1uF ceramic capacitance be selected for reduced system noise.
Additional output capacitance may be added for increased filtering, but should not exceed 220uF.
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Page: 5 / 6
Version: 4-Oct-02
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