WEBENCH® Tools/TPS54318: Indutor value is changing

Hareesh Panakkal

Part Number: TPS54318

Tool/software: WEBENCH® Design Tools

Hi,

I have simulated the TPS54318 part with the following inputs Vin- 4.5V to 5.5V Fsw - 1.125Mhz Output - 2.5V @ 3A 1.

When i simulated with above parameter 2 weeks(13/06/2019) before i was getting following results Inductor - 1.5uH and Vout Overshoot/Undershoot - 100mV. 2.

when i simulated it today(03/07/2019), i am getting different results Inductor - 2.7uH Vout Overshoot/Undershoot - 160mV

Could please tell me the reason? We have finalized the inductor part(1.5uH) and Fsw(1.125Mhz) based on the simulation reports.

Regards,

hareesh.

over 4 years ago

0 Harish K R over 4 years ago

TI__Intellectual 2320 points

Hi Hareesh,

The WEBENCH database gets updated almost twice a month as we add more discrete components like inductor/capacitor to our data-base to provide optimized solution. This could be a reason for change in your WEBENCH design.

To verify changes for your design, Could you please share your previous design report by following below steps ?

Thanks & Regards,

Harish

0 Harish K R over 4 years ago in reply to Harish K R

TI__Intellectual 2320 points

Hi Hareesh,

Alternatively you can share your design by following below procedure.

Thanks & Regards,

Harish

0 Hareesh Panakkal over 4 years ago in reply to Harish K R

Prodigy 210 points

Hi,

I have attached the report. Please have a look.

Regards,

HareeshTPS54318_Report.pdf

0 Harish K R over 4 years ago in reply to Hareesh Panakkal

TI__Intellectual 2320 points

Hi Hareesh,

Extremely sorry for keeping you awaited.

Thanks for sharing the design report. The reason 2.7uH inductor is getting selected now is due to its low cost compared to your previous design (as per your design report).

We would recommend you to proceed with your previous design as the intended target value of inductor is 1.47uH which is close to 1.5uH.

Kindly let us know in case you have any further queries.

Best Regards,

Harish

0 Hareesh Panakkal over 4 years ago in reply to Harish K R

Prodigy 210 points

Hi harish,

Thanks for your reply. Now we can start our design.

Many thanks,

Hareesh.

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WEBENCH® Tools/TPS54318: Indutor value is changing