Power Electronic Devices

Introduction of power device

• Power semiconductor diodes are similar to low power pn-junction diodes.
• Power transistors are identical with npn or pnp signal transistors.
• Power diodes are constructed with n^– layer, this n^– layer is called drift region, which exists between p⁺ layer and n⁺ layer. The p⁺ and the n⁺ layers are known as anode, and cathode (substrate) respectively. The n^– layer is used to support a large blocking voltage.
• This n^– layer is not present in low power diodes or signal diodes.

Note:  

• The low power diodes and transistors are also known as signal diodes and signal transistors respectively.

Difference between Power semiconductor and Signal semiconductor

To know power electronics devices in more detail click here.