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Rectangular Pulse Current vs Duty Cycle

Hey everyone,

I'm having trouble understanding the next plot 

From  SLTA055- Input and Output Capacitor Selection Application report

Can you provide links or documents that help understand it?

Thanks

  • It is specific to the buck regulator, the ripple current is the result of AC and DC current of the inductor. The AC ripple is maximum when the duty cycle is 50% and the DC ripple is proportional to the duty cycle. As you know in the buck regulator you have a switching transistor that you drive with a PWM signal. You have to choose the right duty cycle depending on your application and select the right bypass capacitors to your buck regulator. this link may help you to understand:
    www.ti.com/.../slva630a.pdf
  • Thanks a lot ! I will read the document for sure 

    If you can recommend any other document related to the efficiency of the Buck converters I will be appreciated !