Insulated-Gate Bipolar Transistors (IGBTs)

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An IGBT is a device suitable for high-current control combining a voltage-driven MOSFET in the front stage and a transistor allowing a large current to flow in the rear stage.

IGBT：Insulated Gate Bipolar Transistor

[Equivalent circuit and operation details]

  • The equivalent circuit of the IGBT is shown in Fig. 3-13 (b). The RBE value is set so that the NPN Tr does not turn on.
  • Applying ON signal to gate of an Nch MOSFET turns on conduction state.
  • As a result, current flows from the emitter to the base of PNP Tr. This base current works to lower the ON resistance of Nch MOSFET. (Conductivity modulation effect)

[Comparison with MOSFET]

  • Gate driving operation is the same as Nch MOSFETs.
  • In ON state, decrement of ON resistance of Nch MOS enables high current flow.
  • Voltage drop across the emitter and base of PNP Tr occurs in the entire current region.(Approximately 1.0 V is added up as ON voltage.)
Symbol of IGBT
Fig. 3-13(a) Symbol of IGBT
Internal equivalent circuit of IGBT
Fig. 3-13(b) Internal equivalent circuit of IGBT

Chapter III : Transistors

Types of Transistors
詳細資料
Bipolar Transistors (BJTs)
詳細資料
Bias Resistor Built-in Transistors (BRTs)
詳細資料
Junction Field-Effect Transistors (JFETs)
詳細資料
Metal-Oxide-Semiconductor Field-Effect Transistors (MOSFETs)
詳細資料
Differences between BJT and MOSFET
詳細資料
Structure and Operation of MOSFET
詳細資料
MOSFET Performance Improvement: Decision Factors of RDS(ON)
詳細資料
MOSFET Performance Improvement: Approach to Low RDS(ON)
詳細資料
MOSFET Performance Improvement: Super-Junction MOSFETs (SJ-MOS)
詳細資料
Summary of MOSFET Features by Structure
詳細資料
Performance of MOSFETs: Drain Current and Power Dissipation
詳細資料
Performance of MOSFETs: Avalanche Capability
詳細資料
Performance of MOSFETs: Characteristic of Capacitance
詳細資料
Performance of MOSFETs: Safe Operating Area(or Area of Safe Operation)
詳細資料
Operation of Insulated-Gate Bipolar Transistors (IGBTs)
詳細資料
Performance Improvement of IGBTs: Evolution of Vertical Design
詳細資料
What are RC-IGBTs and IEGTs?
詳細資料
Application of IGBTs
詳細資料
Comparison of Forward Characteristics of IGBTs and MOSFETs
詳細資料
Comparison of Transistors by Structure
詳細資料
Datasheets of MOSFET: Maximum Ratings
詳細資料
Datasheets of MOSFET: Electrical Characteristics
詳細資料
Datasheets of MOSFET: Capacitance and Switching Characteristics
詳細資料
Datasheets of MOSFET: Body Diode
詳細資料

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