ESD2CANFD24-Q1: Spice model

Hey Max,

Unfortunately, we do not have this right now. We are working on it and should be able to have it by tomorrow EOD.

Best,

Bryan

Hi Bryan, 

Thank you for reply, it is ok to have it tomorrow.

Please take this action as the highest priority, I need to complete the simulation and present it to customer by tomorrow.

Best Regards,

Max

Hi Bryan,

My circuits have been drawn in LTspice, ESD2CANFD24-Q1 is a part of circuit, your zip file is for pspice, can you provide the model for LTspice ?

Thanks

Max

Thanks McKenzie.

It works.

Hi McKenzie,

can you check the model?

Seems to me it is wrong behavior, even cannot dissipate any ESD pulse from 300pF and 2kohm network while I tried Littlefuse ones at same circuit, Littlefuse model works perfectly.

I am not sure if you tried the model before.

Thanks

Max

Hi Max, 

Would you be able to share images of your schematic? I checked out the model beforehand and had no problems, so I can work on replicating yours. 

Best,

McKenzie

SCH: 

Clamp Voltage 47V and current Ipp = 14.7A.

1, Why clamp voltage 47V? datasheet  shows around 38V when Ipp = 16A

2,Figure 16-1 on the datasheet, it shows Ipp > 28A if Vclamp = 47V.

what is wrong?

Thanks

Max

I changed the inputs pulse with 0.1us, 8us, 10us .... same issue.

also I noticed that it has same net name.

D1 A...

D2 A..

....

D3 A..

D4 A..

they have same A ?  A means Anode here?

Thanks

Max

Hi Max, 

I am a little confused on what you mean by "clamp voltage 47V". For ESD2CANFD24-Q1, the clamp voltage at 16A (TLP) is 36V. The Ipp (max surge current = 2.5A) clamp is 37V. I also don't know what you mean by Figure 16-1 since there is not one in the datasheet. 

For the model, it follows the structure below. The RLC values are both device and package parasitics from IBIS models and then the diode parameters. 

Is there a specific test standard you are following? This device is rated to IEC 61000-4-2 150pF, 150Ohm and ISO 10605 330pF, 330Ohm. We have not done any validation with 2kOhm. 

Best,

McKenzie

sorry! it is figure 6-8 on the datasheet,

the problem is that I cannot get below 38V clamp voltage either 150pF, 150ohm, or 330pF 330ohm, it is for Ford, yes we need330pF, 2Kohm, (not working at moment).

 it does not even clamp with the schematic i provided early.

it goes to 47V/14.7A with 50v input pulse at LTspice, which does not make sense to me based on the Figure 6-8

thanks

Max

Hi Max, 

Let me work on this from my side to see if I can get it working and possibly change the diode model. What is the timeline for this?

Best,

McKenzie

Hi Mckenzie,

it is over due already, it will be great if you can get it done today or tomorrow. 

I can set a conference call if needed.

Thanks

Max

Hi Max, 

I will send you a new model by end of day tomorrow. I am seeing the same issue you are for 330pF, 2kOhm and seeing higher clamp values on the other ESD ratings. 

Best,

McKenzie