Ge-industrial-solutions Austin Lynx SMT Manuel d'utilisateur télécharger pdf (Page 14)

Data Sheet

September 10, 2013

Austin Lynx

SMT Non-isolated Power Modules:

3.0 – 5.5Vdc Input; 0.75Vdc to 3.63Vdc Output; 10A output current

LINEAGE POWER 14

Thermal Considerations

The power modules operate in a variety of thermal

environments; however, sufficient cooling should always

be provided to help ensure reliable operation.

Considerations include ambient temperature, airflow,

module power dissipation, and the need for increased

reliability. A reduction in the operating temperature of

the module will result in an increase in reliability. The

thermal data presented here is based on physical

measurements taken in a wind tunnel. The test set-up

is shown in Figure 34. Note that the airflow is parallel to

the long axis of the module as shown in figure 33. The

derating data applies to airflow in either direction of the

module’s long axis.

Air Flow

ref

View

Bottom View

Figure 33. T

ref

Temperature measurement location.

The thermal reference point, T

ref

used in the

specifications is shown in Figure 33. For reliable

operation this temperature should not exceed 115

The output power of the module should not exceed the

rated power of the module (Vo,set x Io,max).

Please refer to the Application Note “Thermal

Characterization Process For Open-Frame Board-

Mounted Power Modules” for a detailed discussion of

thermal aspects including maximum device

temperatures.

Figure 34. Thermal Test Set-up.

Heat Transfer via Convection

Increased airflow over the module enhances the heat

transfer via convection. Thermal derating curves

showing the maximum output current that can be

delivered at different local ambient temperature (T

) for

airflow conditions ranging from natural convection and

up to 2m/s (400 ft./min) are shown in the Characteristics

Curves section.

flow

Po w e r M o d u le

ind Tunnel

PWBs

8.3_

(0.325)

76.2_

(3.0)

Probe Location

for measuring

airflow and

ambient

temperature

25.4_

(1.0)

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 20

Commentaires sur ces manuels

Pas de commentaire

Ge-industrial-solutions Austin Lynx SMT Manuel d'utilisateur Page 14

Commentaires sur ces manuels

Produits connexes et manuels pour Équipement Ge-industrial-solutions Austin Lynx SMT