how to calaculate IGBT "ON Resistance"

[nareshgtr]

igbt resistance

Hi everybody,
How to calculate IGBT "ON Resistance". I am using SGP23N60UFD in my design. In MOSFET parameter(Rdson) is there for "ON Resistance". In SGP23N60UFD data sheet no where such parameter is not mentioned.
Regards
V. Naresh Kumar

 

[Guest]

The final element in IGBT is not mos-fet but bipolar , so consequently has no sense to declare one.

 

[nareshgtr]

Dear Dragan,
I red in one application note IGBT has low "ON Resistance" and high break down voltage. So I want confirm with specifications of MOSFET and IGBT. I found ON resistance in MOSFET, but I could not find in the IGBT data sheet.
Regards
V. Naresh Kumar

 

[btbass]

You dont have on resistance you have transconductance.

 

[FvM]

In saturated operation, they don't have a transconductance. They behaviour can be best descibed by the sum of a saturation voltage and a resistance, basically the same as with a BJT, but at a higher voltage level. Also a MOSFET rdson parameter is a simplification. Just take a look at the Typical Output Characteristics in the IGBT datasheet. This diagram contains all necessary information, and also clarifies why rdson doesn't fit for an IGBT.