LMR14020: Compensator Parameters

Chris Hickam

Part Number: LMR14020

I'm looking at using the LMR14020 for a buck converter I'm working on. I would like to perform an AC analysis to ensure stability with my EMI filter. Is their either an AC averaged model for this controller or could someone provide information regarding the compensator type (typeII?) and the parameters of the compensator if an AC model is not available?

over 7 years ago

0 Frank De Stasi over 7 years ago

TI__Guru 57555 points

There are several models on the product page for the LMR14020.

If they do not provide enough detail for you needs, I will ask the Webench group if they have an

averaged AC model.

0 Chris Hickam over 7 years ago in reply to Frank De Stasi

Intellectual 260 points

Thanks for getting back with me so quickly Frank. All of the models on the product page are transient models.

0 Howard Chen-WEBENCH Design Center over 7 years ago in reply to Chris Hickam

TI__Expert 6365 points

HI Chris,

We are working on a standalone Average model for you.

In the mean time, if you like to see a reference stability behavior of the device; the LMR14020 device is in WEBENCH with Bode Simulation enabled.

0 Chris Hickam over 7 years ago in reply to Howard Chen-WEBENCH Design Center

Intellectual 260 points

Thanks Howard,
I'm wanting to simulate the design in a larger system, so I'll look forward to receiving an averaged model when it is completed. PSpice format would be preferable, but as long as the model is in some spice variant I can translate it to PSpice if need be.
Regards,
Chris

0 Howard Chen-WEBENCH Design Center over 7 years ago in reply to Chris Hickam

TI__Expert 6365 points

Hi Chris,

I apologizing for the delay. Below is the newly created LMR14020S PSpice Average model.

Please check it out and let us know if you run into any issues.

LMR14020S_PSPICE_AVG_09FEB2017.zip

0 Chris Hickam over 7 years ago in reply to Howard Chen-WEBENCH Design Center

Intellectual 260 points

Thanks Howard.

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LMR14020: Compensator Parameters