Tyco Electronics Corp.

9

Data Sheet

January 2002

Power Modules: 36 Vdc to 75 Vdc Input; 10 W

SMLW010 Single-Output Low-Profile

Synchronization (Optional)

With external circuitry, the unit is capable of synchroni-

zation from an independent time base with a switching

rate equal to the nominal switching frequency shown in

the Output Specifications table. Other frequencies may

be available; please consult the factory for application

guidelines and/or a description of the external circuit

needed to use this feature.

Thermal Considerations

The power module operates in a variety of thermal

environments; however, sufficient cooling should be

provided to help ensure reliable operation of the unit.

Heat-dissipating components inside the unit are ther-

mally coupled to the case. Heat is removed by conduc-

tion, convection, and radiation to the surrounding

environment. Proper cooling can be verified by mea-

suring the case temperature. The case temperature

Figure 7.

8-1363e

Note: Dimensions are in millimeters and (inches). Pin locations are

for reference only.

Figure 7. SMLW Case Temperature

Measurement Location

Note that the view in Figure 7 is of the surface of the

module. The temperature at this location should not

exceed the maximum case temperature indicated on

the derating curves. The output power of the module

should not exceed the rated power for the module as

listed in the Ordering Information table.

Heat Transfer Characteristics

Increasing airflow over the module enhances the heat

transfer via convection. Figure 8 shows the maximum

power that can be dissipated by the module without

exceeding the maximum case temperature versus local

Systems in which these power modules are used typi-

cally generate natural convection airflow rates of

components in the system. Therefore, the natural con-

vection condition represents airflow rates of approxi-

in the following example.

Example

What is the minimum airflow necessary for an

1.6 A, and a maximum ambient temperature of 86 °C?

Solution

SMLW010A

DC-DC Power Module

IN:DC 36-75V, 0.6A OUT:DC 5V, 2A

1

24 (0.94)

11

(0.45)