Electrical Engineering › Section P · Semiconductor theory, diodes, and transistors › Topic P.13
Insulated-gate FETs (MOSFETs) and IGBTs
Insulate the gate of a field-effect transistor and it draws no steady current at all. That one change made the MOSFET the building block of almost every chip and most power switches, and pairing it with a bipolar output gave the IGBT, the workhorse of high-voltage motor drives.
In this topic
- An insulated gate
- Four terminals and a body diode
- Depletion-type MOSFETs
- Enhancement-type MOSFETs
- Fully on: R_DS(on)
- Worked example: switching a 2 A load from 3.3 V
- The gate is a capacitor
- CMOS: complementary pairs
- The IGBT
- Worked example: MOSFET or IGBT?
- Common mistakes to avoid
- Key takeaways
This topic is part of Wuanberri Pro. Checking your access…