JBW030-Series Power Module: dc-dc Converters
36-75 Vdc Input; 3.3 Vdc and 5 Vdc Outputs; 30 W
Data Sheet
March 27, 2008
Thermal Considerations
The JBW030-Series Power Modules are designed to operate in a variety of thermal environments. As with any
electronic component, sufficient cooling must be provided to help ensure reliable operation. Heat-dissipating com-
ponents inside the module are thermally coupled to the case to enable heat removal by conduction, convection,
and radiation to the surrounding environment.
The thermal data presented is based on measurements taken in a wind tunnel. The test setup shown in Figure 18
was used to collect data for Figure 21.
The graphs in Figures 19 and 20 provide general guidelines for use. Actual performance can vary depending on
the particular application environment. The maximum case temperature of 100 °C must not be exceeded.
12.7 (0.50)
WIND TUNNEL
WALL
MEASURE CASE
TEMPERATURE (TC) AT
CENTER OF UNIT
AIR-
FLOW
CONNECTORS TO
LOADS, POWER
SUPPLIES, AND
DATALOGGER,
6.35 (0.25) TALL
203.2
(8.00)
AIRFLOW
76.2
(3.00)
101.6
(4.00)
AIR VELOCITY
AND AMBIENT
TEMPERATURE
MEASURED
BELOW THE
MODULE
203.2 (8.00)
19.1 (0.75)
8-1046(C)
Note: Dimensions are in millimeters and (inches).
Figure 18. Thermal Test Setup
Basic Thermal Performance
The JBW030-Series Power Modules are constructed with a specially designed, heat spreading enclosure. As a
result, full-load operation in natural convection at 50 °C can be achieved without the use of an external heat sink.
Higher ambient temperatures can be sustained by increasing the airflow or by adding a heat sink. As stated, this
data is based on a maximum case temperature of 100 °C and measured in the test configuration shown in
Figure 18.
Lineage Power
11
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
