Hello,
Does anyone know of a class D single-ended design that is made up of discrete components primarily? It would be preferred it if has a self-oscillating feedback loop used for the comparator.
T
Does anyone know of a class D single-ended design that is made up of discrete components primarily? It would be preferred it if has a self-oscillating feedback loop used for the comparator.
T
Of course, you know the Philips UM10155 is the original Hypex UCD circuit, from a time when Bruno worked for Phillips.
https://www.hypex.nl/
While the UCD is not complicated, it needs some support circuits before you have a working amplifier. But if you run it at a modest power and voltage, maybe the protection circuit could simply be a fuse. If you are not into designing your own amp, and Hypex products are too much, then I suggest you buy a TI chip amp from Amazon etc.
https://www.hypex.nl/
While the UCD is not complicated, it needs some support circuits before you have a working amplifier. But if you run it at a modest power and voltage, maybe the protection circuit could simply be a fuse. If you are not into designing your own amp, and Hypex products are too much, then I suggest you buy a TI chip amp from Amazon etc.
Yes, Hypex, as Steveu has already mentioned above. In case it comes across as expensive, you could build this amplifier yourself as the circuit diagram and sample PCB layout are already included in the datasheet.
Where can I get a sample kit, or kit to assemble myself. I am good with making things. I have thousands, probably tens of thousands of SMD components. But a PCB to populate would be great.
You have to try contacting Philips themselves (NXP) for any PCBs/samples, as this was their product. However, many forum members have successfully built this discrete amplifier using the information from the datasheet. Maybe someone could share their PCB layout with you.
What happened to the Hypex route? The Hypex amplifiers are more refined than these, if I understand correctly. This was meant to be a demo board aimed at showcasing the capabilities of a Class-D amplifier at a time when linear amplifiers ruled the market. I guess things have changed now and designers have finally understood that Class-D can indeed rival linear amps.
What happened to the Hypex route? The Hypex amplifiers are more refined than these, if I understand correctly. This was meant to be a demo board aimed at showcasing the capabilities of a Class-D amplifier at a time when linear amplifiers ruled the market. I guess things have changed now and designers have finally understood that Class-D can indeed rival linear amps.
Excellent if anyone wants to share a PCB design or if anyone would sell me some. I simply want to make a simple single ended low watt Class D amplifier to experiment with a few ideas.
Back in the 2000's, I was designing my own, but I was using MPS chips, not discrete devices.
Back in the 2000's, I was designing my own, but I was using MPS chips, not discrete devices.
I was sort of hoping Ali Express might have what I was looking for, I just don't see a single ended design there. Their search engine leaves a lot to be desired.
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Well yes ... alliexpress is mass sales ...
There is as much good as there is bad ...
This is because of the Westerners who subtract ...
Alli prices have gone up, as has the rest.
hard period ...
There is as much good as there is bad ...
This is because of the Westerners who subtract ...
Alli prices have gone up, as has the rest.
hard period ...
Since you're a designer, it shouldn't be difficult for you to make your own PCB, especially since everything else is given. Anyway, here's someone with a PCB.
https://easyeda.com/divad.retniel/small-ucd_copy