Lineage Power

11

Data Sheet

March 27, 2008

36-75 Vdc Input; 3.3 Vdc and 5 Vdc Outputs; 30 W

JBW030-Series Power Module: dc-dc Converters

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.

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.

76.2

(3.00)

101.6

(4.00)

203.2 (8.00)

AIRFLOW

MEASURE CASE

CENTER OF UNIT

CONNECTORS TO

LOADS, POWER

SUPPLIES, AND

DATALOGGER,

6.35 (0.25) TALL

19.1 (0.75)

12.7 (0.50)

AIR VELOCITY

AND AMBIENT

TEMPERATURE

MEASURED

BELOW THE

MODULE

AIR-

FLOW

WIND TUNNEL

WALL

203.2

(8.00)