Datasheet

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7.2 Convection Requirements for Cooling
To predict the ap proximate cooling needed for the module, refer to the
Power De-rating curves in Figures 8 & 9 . These de-rating curves are
approximations of the ambient temperatures and airflows required to
keep the power module temperature below its maximum rating. Once
the module is assembled in the actual system, the module’s
temperature should be checked as shown in Figure 6 to ensure it does
not exceed 120°C.
Proper cooling can be verified by measuring the power module’s
temperature at Q1-pin 6 as shown in Figure 7.
25.4(1.0)
12.7(0.5)
76.2(3.0)
Power Module
A
ir
flow
Thermocuple Location
for measuring
ambient temperature
and airflow
Bakelite
Wind
Tunnel
Note : Dimensions are in millimeters and (inches)
Figure 6. Thermal Test Setup
Figure 7. Temperature Measurement Location for VPOL16A-
12-SIP
7.3 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 is removed by conduction, convection, and
radiation to the surrounding environment. The thermal data presented is
based on measurements taken in a set-up as shown in Figure 6.
Figures 8 & 9 represent the test data. Note that the airflow is parallel to
the long axis of the module as shown in Fig 6 for the VPOL16A-12-SIP.
The tempe
rature at either location should not exceed 120 °C. The
output power of the module should not exceed the rated power for the
module (VO, set x IO, max). The VPOL16A-12-SIP thermal data
presented is based on measurements taken in a wind tunnel. The tes
t
setup shown in Figure 7 and EUT need to solder on 33mm x
40.38mm(1.300'' x 1.59'') test pcb. Note that airflow is parallel to the
long axis of the module as shown in Fig 6.
rev.
rev.
page
date
DESCRIPTION: point of load converter
6 of 12
08/2007
PART NUMBER: VPOL16A-12-SIP
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