Question
Download Solution PDFWhich of the following is the fastest switching device?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDF- MOSFETs are majority carrier devices that mean flow of current inside the device is carried out either flow of electrons (N-Channel MOSFET) or flow of holes (P-Channel MOSFET).
- So, when the device turns off, the reverse recombination process will not happen. It leads to short turn ON/OFF times.
- As switching time is less, loss associated with it less and hence it gives the highest switching speed.
Important Points
The turn-off times of different power electronic devices are given below:
- MOSFET has the lowest switching off time in the order of nanoseconds.
- BJT has the turn-off time in the order of nanoseconds to microseconds.
- IGBT has the turn-off time in the order of microseconds (about 1 μs).
- Thyristor (SCR) has the turn-off time in the order of microseconds (about 5 μs).
Therefore, the increasing order of turn-off times is:
MOSFET > BJT > IGBT > Thyristor (SCR)
Last updated on May 30, 2025
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