WEBENCH® Tools/TPS54061: current limit has been excessed !?

Driscoll Tsai

Expert 1590 points

Part Number: TPS54061

Tool/software: WEBENCH® Design Tools

Hi Sir,

I simulate TPS54061 by webench, but show error. it seems "calc Iout/Isw" over "Iout/Isw".

how to get/calc these two parameter?

my condition is Vin=10~20V; output is 5V/0.2A.

thanks~

Regards,

Driscoll

over 5 years ago

0 Katelyn Wiggenhorn over 5 years ago

TI__Genius 11040 points

Hi Driscoll,

I also see an error when I run this simulation. I am going to forward this error to the WEBENCH team for support.

Best Regards,
Katelyn

0 Amod Vaze over 5 years ago

TI__Mastermind 21755 points

Driscoll,

Thanks for your question. This is a bug in the peak current limit calculation for this device which causes the min switch current limit of 250mA to be violated for this device (refer pg. 5 electrical characteristics current limit row for this number). In reality, the peak current would be around 240mA (Ipeak = Iout + Ipp/2 where Ipp is around 40% Iout) so this design should work. We will take action to fix this issue in the tool.

Regards,
Amod

0 Amod Vaze over 5 years ago in reply to Amod Vaze

TI__Mastermind 21755 points

Driscoll,

This issue is now fixed and will be released to production mid-February.

Regards,
Amod

0 Amod Vaze over 5 years ago in reply to Amod Vaze

TI__Mastermind 21755 points

Driscoll,

Thanks a lot for your patience. We have released the fix and you should be able to create your design now.

Regards,
Amod

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WEBENCH® Tools/TPS54061: current limit has been excessed !?