LC/LW010- and LC/LW015-Series Power Modules:
18 Vdc to 36 Vdc or 36 Vdc to 75 Vdc Inputs, 10 W and 15 W
Data Sheet
March 27, 2008
Module Derating
Thermal Considerations (continued)
The derating curves in Figures 43 through 45 were
determined by measurements obtained in an experi-
mental apparatus shown in Figure 61. Note that the
module and the printed-wiring board (PWB) that it is
mounted on are both vertically oriented. The passage
has a rectangular cross section.
3.5
3.0
2.5
2.0
1.5
1.0
VI = 75 V
VI = 60 V
FACING PWB
PWB
VI = 48 V
VI = 36 V
0.5
0.0
0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
MODULE
NORMALIZEDOUTPUT CURRENT (IO/IO, max)
8-1380(C)
Figure 58. LW010A, B, C Typical Power Dissipation
vs. Normalized Output Current at
TC = 25 °C
AIR VELOCITY
AND AMBIENT
TEMPERATURE
MEASURED
3.5
3.0
76 (3.0)
AIRFLOW
BELOW THE
MODULE
2.5
VI = 60 V
VI = 75 V
2.0
1.5
13 (0.5)
1.0
VI = 36 V
8-1126(C).d
VI = 48 V
Note: Dimensions are in millimeters and (inches).
0.5
0.0
0.0
Figure 61. Experimental Test Setup
0.5
1.0
1.5
2.0
2.5
(A)
OUTPUT CURRENT, IO
8-1816(C)
Layout Considerations
Figure 59. LW010F Typical Power Dissipation vs.
Output Current at TC = 25 °C
Copper paths must not be routed beneath the power
module standoffs.
3.0
2.5
VI = 75 V
VI = 60 V
2.0
1.5
VI = 36 V
VI = 48 V
1.0
0.5
0.0
0.0
0.2
0.4
0.6
0.8
1.0
NORMALIZED OUTPUT CURRENT,
IO1 = IO2 [(IO1 + IO2)/(IO1, max + IO2, max)]
8-1817(C)
Figure 60. LW010AJ, BK, CL Typical Power
Dissipation vs. Normalized Output
Current at TC = 25 °C
Lineage Power
21
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
