What is a heat sink Its purpose Diagram to show how is heat dissipated when transistor is mounted on a heat sink Types of heat sink
- Get link
- X
- Other Apps
What is a heat sink ?
The maximum power dissipated by a power transistor and transistor junction temperature are closely related because junction temperature increases due to power dissipation.
Hence it is necessary to keep the junction temperature below the maximum specified value or else the crystalline semiconductor structure will get permanently damaged.
The power transistor is mechanically attached to a metal surface that provides a large surface area for heat dissipation to the surrounding air.
The mechanical device is called a heat sink.
The heat sink takes away the heat from the power transistor
via thermal conduction and expels the heat to the surrounding air by thermal
convection and radiation.
Advantage of heat sinks are:
Temperature of the transistor casing gets lowered
The power handling capacity of the transistor can now approach the rated maximum value.
- Get link
- X
- Other Apps
Comments
Post a Comment
Welcome