thanks, that is what I was guessing, however as the 1µH should not influence the audio band, I was not sure if any core material would matter.
That inductor will saturate and cause distortion, it is not like a perfect spice model.
A coil of wire will not saturate. Core material matters a lot.
A coil of wire will not saturate. Core material matters a lot.
You may find quite similar chokes from Bourns.
This looks like carbonyl-core, which are non-linear over a wide range of current swing. Better are chokes from ferrite material.
Air coils need lots of turns and produce significant stray field that may disturb nearby circuitry.
Considering the market of class-d-amp modules nowadays in many cases the total THD ist dominated by the el-cheapo output chokes, not by the IC.
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It depends on what the inductor is rated for saturation current. I use a Wurth flat copper wire ferrite 1.5uH inductor (oversized 97A rated ) on the output of my FH9HVX griddle amp. It’s mostly for the cool factor as I like some interesting focal point of hardware to break up the monotony of typical Class AB amps. 🙂
I can be certain this inductor isn’t going to saturate!
So look at the saturation current rating and give it some margin. Typically you will need to get a flat copper wire ferrite like a SER series from CoilCraft to reach the 20A to 30A rating.
Although this shielded “box” shaped inductor is good for 20-30A and looks similar to the one shown in post 1.
https://www.coilcraft.com/getmedia/7b108457-7731-456d-9256-ca72f2e1a551/xal1030.pdf
I can be certain this inductor isn’t going to saturate!
So look at the saturation current rating and give it some margin. Typically you will need to get a flat copper wire ferrite like a SER series from CoilCraft to reach the 20A to 30A rating.
Although this shielded “box” shaped inductor is good for 20-30A and looks similar to the one shown in post 1.
https://www.coilcraft.com/getmedia/7b108457-7731-456d-9256-ca72f2e1a551/xal1030.pdf
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Your link points to a "soft saturating" inductor - nice wording for the worst linearity obtanainable with carbonyl inductors. These are fine for switch mode supplies but should be avoided for low thd audio applications.