LM5145: Webench Provides Different Design Values with Same Input Params

John Fagerlund38

Part Number: LM5145

I ran Webench to generate a LM5145 design back in 10/21 that we're currently using. I ran it again using the same parameters and got some different values. Has the tool changed? Should my board design change?

Input 54V to 12V 8_5_2021.pdf Input 54V to 12V 10_22_2019.pdf

Thanks,

-j

over 4 years ago

0 John Fagerlund38 over 4 years ago

Intellectual 260 points

That should be 10/19 not 10/21

+1 Timothy Hegarty over 4 years ago in reply to John Fagerlund38

TI__Guru 74012 points

Hi John,

Yes, we updated WEBENCH to more accurately reflect the datasheet and quickstart tool equations.

The old design is still stable but it used a different component value calculation method. You can update if you're still in the proto stage.

Regards,

Tim

Power management

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LM5145: Webench Provides Different Design Values with Same Input Params