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BQ24103A: Inductor Caclulation

Bill Keith
Intellectual 300 points
Part Number: BQ24103A

How do we calculate the proper inductor value. The datasheet uses 30% inductor ripple current for the calculation.  Does the ripple current have a range or does it have to be 30%

  • 0
    TI__Guru**** 165886 points

    Hi Bill,

    30%-40% is a generally accepted inductor current range for dc-dc converters.  If higher than that either the output voltage ripple gets too high for most applications or the current limit circuitry can no longer accurately measure the current.

    Regards,

    Jeff