LM3423: Need help to simulate & measure the on time of LED driver

Hello Bhasha,

That is beyond the scope of E2e.  We do provide a model of the LM3423 in Boost mode on our website below under Design tools and simulation.  You will need to use that model to generate your own Buck model.

LM3423 data sheet, product information and support | TI.com

Thanks Tuan

Hi Tuan 

I modified that LM3423 as a buck mode circuit, facing one issue with the input LED current like a square wave changing from 0A to 5.3A (expecting non zero condition input current), still the output current was somewhat linear

So please help me to make the input current with my requirement as mentioned an above 

Please find the attached simulation below in TINA TI

LM3423_BUCK.TSC

Hello Bhasha,

Please down load and use the PSpice model instead of the TINA.

Thanks Tuan

I am getting error while trying to import the Pspice model of LM3423

So, please also check the circuit in the above file & share your comment.

Hello

Did you down load the design file under Design Tools and Simulation from TI from the below link or how did you get the design file?  It should be a PSpice design file already if you have PSpice then there is no importing.  If you don't have PSpice then you can request to down load the program from the link below.

LM3424 data sheet, product information and support | TI.com

Thanks Tuan