The insulated gate bipolar transistor (IGBT), which was
introduced in the early 1980s, has become a successful
device because of its superior characteristics. The IGBT is a
three-terminal power semiconductor switch used to control
electrical energy and many new applications would not be
economically feasible without IGBTs. Prior to the advent of
the IGBT, power bipolar junction transistors (BJTs) and power
metal oxide field effect transistors (MOSFETs) were widely
used in low to medium power and high-frequency applications,
where the speed of gate turn-off thyristors was not
adequate. Power BJTs have good on-state characteristics but
long switching times especially at turn-off. They are currentcontrolled
devices with small current gain because of highlevel
injection effects and wide basewidth required to prevent
reach-through breakdown for high blocking voltage capability.
Therefore, they require complex base-drive circuits to provide
the base current during on-state, which increases the power
loss in the control electrode.
On the other hand, power MOSFETs are voltage-controlled
devices, which require very small current during the switching
The insulated gate bipolar transistor (IGBT), which was
introduced in the early 1980s, has become a successful
device because of its superior characteristics. The IGBT is a
three-terminal power semiconductor switch used to control
electrical energy and many new applications would not be
economically feasible without IGBTs. Prior to the advent of
the IGBT, power bipolar junction transistors (BJTs) and power
metal oxide field effect transistors (MOSFETs) were widely
used in low to medium power and high-frequency applications,
where the speed of gate turn-off thyristors was not
adequate. Power BJTs have good on-state characteristics but
long switching times especially at turn-off. They are currentcontrolled
devices with small current gain because of highlevel
injection effects and wide basewidth required to prevent
reach-through breakdown for high blocking voltage capability.
Therefore, they require complex base-drive circuits to provide
the base current during on-state, which increases the power
loss in the control electrode.
On the other hand, power MOSFETs are voltage-controlled
devices, which require very small current during the switching
การแปล กรุณารอสักครู่..
![](//thimg.ilovetranslation.com/pic/loading_3.gif?v=b9814dd30c1d7c59_8619)