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清小暮.1
Visitor II
August 28, 2025
Question

About the calculation results of the eDesignSuite power supply design tool

  • August 28, 2025
  • 1 reply
  • 439 views

The calculation results from the power supply design tool and the values ​​recommended in the Application Note are different. Is this okay?

The device used is L5972D

result

1_0-1756357251877.png

Application note recommendations

1_1-1756357291243.png

1_2-1756357309013.png

Output Capacitor
Power Supply Design Tools 22μF
Application note 100to470μF

inductor
Power Supply Design Tools 68μH
Application note 33to47μH

Thank you

1 reply

Patrizia BELLITTO
ST Employee
September 10, 2025

Hello,

all the components in eDesignSuite - Power Supply design tools are designed applying formulas and calculation that take into account user's main specifications and parameters that you can change and customize in the wizard. This could explain why, sometimes, there are differences between the general application note and the specific design that you requested. 

I hope this can help.

 

Best regards,

Patrizia