What is a Power Transistor?

What is a Power Transistor?

Power Transistor definition

The utility model relates to a bipolar junction transistor that can withstand high voltage and high current

Power Transistor  structure composition

• Three-layer semiconductor

• Two PN junctions

How Power Transistor  work

In power electronics technology, GTR mainly works in the on-off state. GTR usually operates at positive bias (Ib>0) with large current conduction; Reverse bias (Ib<0) is in the cutoff state. Therefore, a sufficiently large pulse drive signal is applied to the base of the GTR, and it will work in the on-off and off-switch states.

Main parameters of Power Transistor 

• Maximum operating voltage

• Maximum allowable collector current

• Maximum allowable collector dissipation power

• Maximum working junction temperature

Basic characteristics of Power Transistor 

• Static characteristic

• Dynamic characteristic

Power Transistor  advantages

• Device maturation

• Low switching loss

• Short switching time

Power Transistor  defect

• High driving current

• Poor inrush current resistance

• Susceptible to damage by secondary breakdown