Question

An Integrated Circuit (IC) internally generates 1.8 Watts of heat energy which must be dissipated to ensure its reliable operation. A heat sink is attached to the IC to transfer heat away by convection. The dimensions of the flat heat sink are 6.6 cm by 5.3 cm. Assuming only one side of the heat sink is exposed to the air, the surrounding air temperature is at 25 ºC and the heat transfer co-efficient of the heat sink is 49 W/(m².K).

At what temperature will the IC be operating when the heat sink is dissipating the required power? State your answer in ºC.

Work with 5 significant digits. State all answers to 4 significant digits. Enter key equations and partial results to earn part marks.

Answer 1