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Thread: 20W I2S Audio Amplifier Board

  1. #1
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    20W I2S Audio Amplifier Board

    Anyone know of a ~20W / channel stereo I2S Class D amplifier board? Having I2C control for configuration and volume control would be an extra bonus. A manufacture’s Eval Board showcasing their chip might do very nicely.

    This one looks ideal but seems to be made of Unobtainium: https://www.components-shop.com/prod...1-ZLS1-EB.html

    I’ve also seen some from TI on the inter-web. They’re kind of pricey.

    Thanks.

  2. #2
    That device looks perfect. Why do you think it’s unobtanium? It shows 862 in stock, and $22 seems fair.

    Maybe you are confused by the US decimal point?
    Last edited by tele_player; 11-13-2019 at 10:15 PM.

  3. #3
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    Quote Originally Posted by tele_player View Post
    That device looks perfect.
    It does, just as I mentioned.

    Why do you think it’s unobtanium? It shows 862 in stock, and $22 seems fair.
    * There's no "buy" button on the web site I linked.

    * I've entered an RFQ on the web site --- no reply.

    * I've sent multiple emails to their "Customer Service" and "Tech Support" addresses --- no reply.

    * A Technical Rep for ISSI (who I know through work) told me that Components-Shop.com is not an official distributor for them. She's currently seeing if anything is available proper through channels (even though this is a G-job).

    * Digi-Key shows no stock and my RFQ is still pending.

    * Mouser and Arrow don't even list this Eval Board. Although, they do show the chip.

    * Amazon and eBay searches returned no hits.

    I'm open to suggestions.
    Last edited by gfvalvo; 11-13-2019 at 11:16 PM.

  4. #4
    Ahh, now I understand. I searched the same places...

  5. #5
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    What feature is it that's driving the selection for this chip in particular? Perhaps a codec + class D amp solution would work for you?

    Alternatively, the datasheet for the eval board provides a BOM and board layout that looks pretty easy to clone if you're not able to order it through a distributor.

  6. #6
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    Quote Originally Posted by wcalvert View Post
    What feature is it that's driving the selection for this chip in particular? Perhaps a codec + class D amp solution would work for you?
    I already have that. Now I'm looking for an integrated, digital-to-the-final-chip solution.

    Alternatively, the datasheet for the eval board provides a BOM and board layout that looks pretty easy to clone if you're not able to order it through a distributor.
    Already thought of that. But, fabbing the PWB and buying the BoM for a onesie-twosie production run would probably cost more than I'm interested in spending. I'd buy an over-priced, but pre-tested, EVB from TI first.

  7. #7
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    I've used this one from Adafruit https://www.adafruit.com/product/1752

  8. #8
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    Quote Originally Posted by GordonRush View Post
    I've used this one from Adafruit https://www.adafruit.com/product/1752
    So have I. But, it has analog inputs. I'm looking for I2S.

  9. #9
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    Here's what I found and ordered: http://store.sure-electronics.com/product/AA-AB32255. It looks promising. The TI chip appears capable but quite complex. It has significant Audio DSP abilities that are customized via TI's proprietary software. But, I need none of that and it's claimed the board will simply do what I need right out of the box. Will report back on how it goes.

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