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LM48580: Boost Converter Inductor Selection

user4848255
Prodigy 80 points
Part Number: LM48580

Hello

I am currently working on an application where the area of the circuit is the most important parameter. Due to this reason, we have to reduce the size of the external components, especially the inductor and the Schottky diode. We have already measured the amplifier with a 2.2µH inductor and we haven't seen any problems in terms of SPL (output voltage) and THD. Could I get additional information on the following points:

- Do you have any recommended inductor or Schottky diode with respect to a very small volume of the components (especially the height of the component)

- Do you see a risk in the stability of the boost converst in case we use a 2.2 µH inductor?

- Do you have already experience with different external components?

Thank you very much for your help

Best regards

Markus 

  • 0
    TI__Guru** 108925 points
    Hi Markus,

    We haven't tested different external components. Also the specs on data sheet are obtained with recommended components; different setups are not guaranteed to work within specs.
    You could try with different components but ensure that current rating for both inductor and diode are sufficient. Current rating should be higher than the maximum current from the system.

    Best regards,
    -Ivan Salazar
    Texas Instruments
  • 0 in reply to Ivan Salazar
    Prodigy 80 points
    Hi Ivan

    Is there a certain scenario where you would assume problems with a 2.2 µH Inductor? Any specific operation corner (temperature, voltage, ...) where you assume that it might cause problems? Otherwise we have to do a lot of measurements to ensure proper operation. We just want to start with the most critical ones.

    Thank you and best regards

    Markus