Why IGBT is papular nowadays? What is its advantages over other semiconductor switches?
Hi
An IGBT possesses high input impedance and has low on-state
power loss.
Do you really want RG members to do this for you ? These are questions a 'Master EE' should be able to answer
Dear Mahdi and U. Dreher
If somebody doesn't know anything, its better to ask.
@Hassan Abedinia
A bit of own work using the "magic tools" like wikipedia or google would be really nice. Or some reading in lecture notes, research in the library and alike.
To cut things short (and finally give an answer):
The main alternatives for power semiconductors are MOSFET and IGBT. (There are others for 'special applications', but the "mass market" conentrates on these two.)
The conduction losses for MOSFET are P = ID2 * RDS
Conduction losses for IGBT: P = ID * VDS (VDS is about 2 V under normal conditions)
Taking into consideration the current limits (which evolve every 3 months or so), there is always a point where the losses in the IGBT are lower than those in the equivalent MOSFET.
Typically, MOSFETs with a rating beyond 600 V are hard to get while 1200 V for IGBTs are not unusual. So the arguments for IGBTs are voltage (where MOSFET are not available) and high currents where the losses in IGBTs are lower than in MOSFETs.
There are more factors to be considered (price, die size, switching frequency etc.), but the current trend is - only partly justifiable - vs. the IGBT.
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