What is the difference between an IGBT and a MOSFET?

An IGBT is a device that has a basic structure of a P-layer added to the drain side of a MOSFET. An IGBT is suited for large-current and high withstand-voltage applications. A MOSFET is suited for small-capacity and high-speed switching applications.

Why is FWD required?

Conventional IGBT elements are not capable of blocking a reverse-withstand voltage. When an inverter circuit is used to drive an inductive load like in a motor, the load current will continue flowing in the reverse direction (emitter to collector) at the time of switching. This may damage the IGBT. The IGBT is protected by a […]