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About current ripple on the peak current topology buck converter

Gary An
Intellectual 440 points

Hi all,

Generally, inductor ripple is 20~30% of DC load current in the general buck converter, and I learned that ripple current should not be low on the peak current buck converter.

How much of the ripple current percentage should be on the peak current mode buck converter?

If the current ripple is lower than 10% on the general buck converter, can it be on the problem?

Thank you

  • 0
    TI__Expert 4555 points

    Hello Gary,

    First I would like to understand, what is your application requirement here? What factors are driving you to lower down the current ripple?

    Providing any such number is not possible, it basically depends on switching frequency, parts' internal slope compensation, etc.

    We don't want to increase the output inductor too much, bring inductor pole inside the system's bandwidth.

    Best Regards,

    Ankit Gupta