AMD-K6 datasheet(280/346 Pages) AMD

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Thermal Design

Chapter 17

AMD-K6® Processor Data Sheet

20695H/0—March 1998

Preliminary Information

Measuring Case

Temperature

The case temperature must be measured on the top center of

the package where most of the heat is dissipated. Figure 94

shows the correct location for measuring the case temperature.

(If a heat exchange device is installed, the thermocouple must

contact the processor top surface through a drilled hole.) The

case temperature is measured to ensure that the thermal

solution meets the operational specification.

Figure 94. Measuring Case Temperature

17.2

Layout and Airflow Considerations

Voltage Regulator

A voltage regulator is required to support the lower voltage

(3.3 V and lower) to the processor. In most applications, the

voltage regulator is designed with power transistors. As a

result, additional heatsinks are required to dissipate the heat

from the power transistors. Figure 95 shows the voltage

regulator placed parallel to the processor with the airflow

aligned with the devices. With this alignment, the heat

generated by the voltage regulator has minimal effect on the

processor.

Thermocouple

AMD-K6 Datasheet(PDF) 280 Page - Advanced Micro Devices