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LM2841: inductor selection about LM2841

Part Number: LM2841

Hi team,

customer calculate the inductor value based on datasheet, it will be about 300uH. But in actual and datasheet, it recommend use 10uH to 22uH or 47uH. they are confused about that. how to select the correct inductor? why their have a big gap between calculation and actual ?


  • Hi Betty,

    Data sheet calculation assume the load current is 300mA.

    LM2841 uses peak current mode control, it require the inductor ripple current has minimum value for proper control, you can use 30mA as start point to calculate the inductor value if actual load current is much more less than 300mA.

    B R