LM5156H: schematic check

Hi Sir,

have any suggestion and update?

thnaks for your great support.

Hi Tommy,

Thanks for using the E2E forum.

I have reviewed your schematic and found some recommendations:

1. Kindly use the Quick start calculator to recalculate the Comp pin compensation.

2. Kindly, use the recommended soft start capacitor to mitigate the initial inrush currents caused by the output caps. 

https://www.ti.com/tool/download/SNVC224

Best Regards,

Hassan 

Hi Hassan,

This schematic diagram is designed based on the simulation results on the TI website.
It seems that there is some discrepancy with the numerical calculation suggestions for related components in Excel that you provided.
Which one should we focus on?

https://webench.ti.com/power-designer/switching-regulator/customize/11?VinMin=3.5&VinMax=6&O1V=12&O1I=0.7&base_pn=LM5156H&AppType=None&Flavor=none&op_TA=30&origin=pf_panel&lang_chosen=en-US&optfactor=3&Topology=Boost&flavor=none&VoltageOption=none

Hi Nicholas,

I recommend to use the Quick Start calculator because it design to focus the particular device.

Best Regards,

Hassan  

Update the schematic according to the result of Quick Start calculator.

Then help confirm whether it is OK?

Hi Nicholas,

Can you please check the phase margin for the selected compensation network?

It should be greater than 60 degrees.

The SS is fine.

Best Regards,

Hassan 

Phase Margin =71 degress,  As shown below:

Hi Nicholas,

The Phase Margin is good.

Best Regards,

Hassan 

Hi Hassan,

Thanks for your review & support.

Best Regards,

Nicholas