LM5146-Q1: The output voltage in the Webench simulation is low

Danilo A.

Part Number: LM5146-Q1
Other Parts Discussed in Thread: LM5145

Hi Team,

Our customer simulated the LM5146QRGYRQ1 in Webench. Below is the link to the simulation.

webench.ti.com/.../SDP.cgi

The Vout Actual value at page 8 of the Webench Design Report is 24.063V. However, the graph at page 10 shows that Vout is around -1V instead of 24V. Can you please clarify what the graph means?

WBDesign103.pdf

Regards,

Danilo

over 2 years ago

0 Timothy Hegarty over 2 years ago

TI__Mastermind 49367 points

Hi Danilo,

This should be resolved soon as we're planning to release an updated LM5146-Q1 model.

In the meantime, my recommendation is to use the LM5146-Q1 quickstart calculator to assist with power supply design, component selection, efficiency and bode plot review, etc.

https://www.ti.com/tool/LM5146DESIGN-CALC

Note that there is a 24V output apps example in the LM5145 datasheet that also works for the LM5146-Q1.

Regards,

Tim

0 Danilo A. over 2 years ago in reply to Timothy Hegarty

TI__Mastermind 24705 points

Hi Tim,

Thank you very much for your explanation and for sharing the quickstart design tool and the link to a 24V application circuit using LM5145.

Regards,

Danilo

0 Timothy Hegarty over 2 years ago in reply to Danilo A.

TI__Mastermind 49367 points

No problem, Danilo. Thank you!

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LM5146-Q1: The output voltage in the Webench simulation is low