LM5176: PSpice related questions

Viktorija Cecil

Mastermind 18491 points

Part Number: LM5176

Team, can you help my customer with these questions:

I am trying to run a simulation in Orcad PsPice for the LM5176, But I have a problem and a question:

1.- What should I put in the SS parameter under the model:

2.- I have a problem with the DITH Pin.

Thanks

Viktorija

over 4 years ago

0 Brigitte over 4 years ago

TI__Guru 66350 points

Hello Viktorija,

I think that 1 means the softstart is simulated and 0 means that softstart is not simulated, but I need to check more in detail.

I can observe the same issue when I add a capacitor to DITH. The dithering feature is not modelled in the current pSpice model.

0 Viktorija Cecil over 4 years ago in reply to Brigitte

TI__Mastermind 18491 points

Hi Brigitte,

Checking back on this one.

Thanks

0 Brigitte over 4 years ago in reply to Viktorija Cecil

TI__Guru 66350 points

Hallo Viktoria,

The parameter SS is either 0 or 1. 0 means no softstart and the converter is directly in regulation. SS = 1 means the softstart is enabled and the simulation takes longer.

Dithering is not modelled.

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LM5176: PSpice related questions