How to change both Vgs(th) and Rds(on) in C3M0160120D?

ABC

I noticed that there is a solution to the question for changing Vgs(th) of C3M0016120D, but I have no idea how to change both Vgs(th) and Rds(on) of C3M0160120D. Could you just give me a hand?

Forum_Moderator

Thank you for your post, it has been approved and we will respond as soon as possible.

ABC

Thank you for your reply, looking forward to your respond.

TBhatia

Hello ABC,

Can you please elaborate on the question? What do you mean by "I noticed that there is a solution to the question for changing Vgs(th) of C3M0016120D"?

I think what you might have seen is modifying the Vth in the SPICE simulation model of the C3M0016120D. Is that correct?

ABC

Exactly, you are so right

ABC

Now I want to modify both the Vth and Rds(on) in the SPICE simulation model of the C3M0160120D.

ABC

How is it going? I need it urgently.

TBhatia

Hello ABC,

Our team is looking into your question. Please expect a response soon. Thank you!

sparasaram

Hello,

It is possible to vary the Vth for the device (I will outline the process below), but Rdson is a more complicated thing. As Rdson depends on the active area of the die, changing it would vary multiple other factors which will ultimately result in an unreliable model.

To change the Vth, please find the equation (highlighted in yellow) below in the .lib file. The Vth is modeled as a voltage source which is dependent on the junction temperature. You can change the slope or the equation itself to change the Vth you require at a given temperature.

Please note: Changing the parameters in the .lib file will result in the model being non representative of the actual device, so please make sure you are making reasonable changes to it.

Thank you,

Sparasaram

ABC

Thank you for you sincere help. Could you design a .lib model for the C3M0160120D which not only could change both Rds(on) and Vgs(th), but also is reliable? I would appreciate it so much if you could do it.

ABC

sparasaram

hello,

you are welcome. I would like to understand the request a little better before I work on this. By how much do you plan to vary the Rdson in this model?

Thank you,

Sparasaram

ABC

vary from 168 mohm to 187 mohm

ABC

Vth vary from 2.54 to 3.51

sparasaram

Hello,

Please find the model for the C3M0160120D in which you can vary the Vth and Rdson as requested.

Please vary the parameters P13 and P14 (highlighted in the picture below) to change the Vth and Rdson values respectively.

The parameter P13 will reflect the required Vth at 25C only.

I have added the additional Rdson required as a parasitic source resistance. Again the P14 value is representative of the required Rdson at 25C only.

Hope this helps, please let me know if you have any questions,

Thank you,

Sparasaram

XC3M0160120D.lib

ABC

THANKS, you have solved my problem perfectly.