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TAS5825MEVM: Entering smart amp characterization data - document of the paramters and their meaning

Part Number: TAS5825MEVM

Hi,

I have Smart Bass applied on a system where Bass driver is running a box tuned with PR.
I am entering parameters manually. However as I am working with a supplier, we have some challenges aligning their measured parameters and open fields in Purepath Console.

is there a document, which explains all these required parameters in detail?

if not, can you kindly explain   how to obtain / what are the meaning of   following parameters:

L2 on inductance model

Ke on inductance model

Rm PR on enclosure with Passive Radiator


Thank you!

  • Hi Mikko

        Please check the following table:

    Parameters

    Unit

    Description

    Re

    DC resistance of the voice coil

    Sd

    cm2

    Area of the diaphragm

    Bl

    T∙m

    Force factor

    Rms

    N∙s/m

    Mechanical damping factor

    Mms

    g

    Mechanical mass

    Cms

    m/N

    Mechanical compliance

    Le

    mH

    Leakage inductance of the voice coil

    L2

    mH

    Inductance of the voice coil

    Ke

    sH

    Semi inductance of the voice coil

    u

    V

    Input voltage

    i

    A

    Input current

    v

    m/s

    Velocity of the membrane

    X

    m

    Membrane excursion

       The parameter you asked:

    Inductance of the voice coil: the voice coil inductance usually measured in millihenries (mH). Typically, the industry standard is to measure the voice coil inductance at 1000 Hz. As frequencies increase above 0 Hz, there is a rise in impedance above the Rdc value. This is because the voice coil acts as an inductor

    Semi inductance of the voice coil: The concept of semi-inductance was developed by John Vanderkooy of the University of Waterloo, in Canada. It is useful in the analysis of the behavior of dynamic Loudspeakers. The current in the voice coil induces eddy currents in the iron magnetic structure around the coil, and these eddy currents modify the electrical impedance of the coil so it is dominated by a component proportional to the square root of frequency.

    Mechanical damping factor: The mechanical damping factor, often called the backing, and the matching layers both affect the theoretical impulse response of the piezoelectric material. This theoretical response is a close match to the response of the material to a practical electrical pulse or a step function when the converse piezoelectric effect is used with the transducer as a source of ultrasound.