WEBENCH® Tools/LM21212-2: TINA Spice model and Webbench results differ

Heng Chuan Shu

Part Number: LM21212-2

Tool/software: WEBENCH® Design Tools

The steady state results between Webbench and SPICE model from TI website are significantly different. Am I using the wrong model or wrong setting?

Attached are the webbench link and TINA spice netlist.

https://webench.ti.com/appinfo/webench/scripts/SDP.cgi?ID=B525DA290F8F9FDF

0 Atul_Kulkarni over 4 years ago

Genius 4910 points

Hi Heng,

Could you please share the snapshots of waveforms of steady-state test benches. Also, there is no TINA model for the device on the site.

Let us know from where did you get the TINA model.

Thanks and Regards,

Atul

0 Heng Chuan Shu over 4 years ago in reply to Atul_Kulkarni

Hi Atul,

There are four spice models listed. I import them into TINA.

0 Atul_Kulkarni over 4 years ago in reply to Heng Chuan Shu

Genius 4910 points

Hi Heng,

We ran the TINA model shared by you by adjusting the parameters. Please find the below steps to change the parameters.

1) Go the set Parameters

2) Change maximum time step to 20n

Below is the output after running the simulation

Thanks and Regards,

Atul

0 Heng Chuan Shu over 4 years ago in reply to Atul_Kulkarni

Thanks Atul, it helps!

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