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TINA/Spice/LM5116: Simulation of overcurrent protection function

user1126267

Prodigy 90 points

Part Number: LM5116
Other Parts Discussed in Thread: TINA-TI,

Tool/software: TINA-TI or Spice Models

Is it possible to simulate the overcurrent protection function?

I confirmed it in the sample file.
1. The peak current value of overcurrent protection does not match the design value
2. HICUP mode can not be set at overcurrent

Can these functions be simulated?

over 7 years ago

0 Robert Blattner over 7 years ago

TI__Expert 6245 points

I am forwarding this to our LM5116 expert, Tim.

0 Timothy Hegarty over 7 years ago

TI__Guru 74052 points

Hello,

Please provide the TSC file so we can look at it.

Regards,
Tim

0 user1126267 over 7 years ago in reply to Timothy Hegarty

Prodigy 90 points

Hello,

TSC file attached.

In this circuit, I think that the peak current of Rsense will be 33 A,

but it will be 50 A in the simulation result.

Also, since 0.1 uF is added between the UVP pin and GND, HICUP

(oscillation = 3.7 ms (= 256/70 kHz), stop = 1.3 ms) will occur,

but HICUP does not occur in the simulation result.

Regards,

S.Sato

CurrentLimit.TSC

0 Arpan Gupta over 7 years ago in reply to user1126267

TI__Expert 3140 points

Hello,

Thanks for pointing out the issue. We will update the model present in website.

0 user1126267 over 7 years ago in reply to Arpan Gupta

Prodigy 90 points

Hello,

Thank you for your reply.
I will wait update.

S.Sato