Lineage Power

13

Data Sheet

April 2008

36 Vdc to 75 Vdc Inputs; 20 W

LW020 Single-Output-Series Power Modules:

Thermal Measurements

The derating curves in Figure 16 were derived from measurements obtained in an experimental apparatus shown

in Figure 21. Note that the module and the printed-wiring board (PWB) that it is mounted on are vertically oriented.

The passage has a rectangular cross section.

8-1126(C).d

Note: Dimensions are in millimeters and (inches)

.

Figure 21. Experimental Test Setup

Layout Considerations

Copper paths must not be routed beneath the power module standoffs.

AIR VELOCITY

AND AMBIENT

TEMPERATURE

MEASURED

BELOW THE

MODULE

AIRFLOW

13 (0.5)

FACING PWB

MODULE

76 (3.0)

PWB