The TDA current consumption is 50 mA at the most per voltage , that's not really à lot
, supercaps are totally useless herethe sound you hear is made and shape at the analog side , and what comes out the TDA is 4 mA not a lot too
the digital side make bits , bits that we like to be clean , on time and steady , dont we
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It certainly doesn't need it to function. Any power supply that can hold +-5V will do. But, to my ear there is a not so subtle impact on sound.
And if you think this is mad, there are a bunch of people building power supplies out of 3000F caps to power their FIFO reclock feeding the I2S signal. It presents a similar load.
https://www.diyaudio.com/community/...te-weapon-to-fight-the-jitter.192465/page-617
And if you think this is mad, there are a bunch of people building power supplies out of 3000F caps to power their FIFO reclock feeding the I2S signal.
It presents a similar load.https://www.diyaudio.com/community/...te-weapon-to-fight-the-jitter.192465/page-617
It's important to me that the bit clock to the TDA is stopped once the data has been latched.The TDA current consumption is 50 mA at the most per voltage , that's not really à lot
the sound you hear is made and shape at the analog side , and what comes out the TDA is 4 mA not a lot too
the digital side make bits , bits that we like to be clean , on time and steady , dont we
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Very interesting @wlowes ! From Wikipedia on supercaps: "can accept and deliver charge much faster than batteries" sounds like an interesting idea for powering the the digital. Have you tried powering the digital front end from supercaps too? Have you tried stacking them up to power -15V line too? Any pictures of your contsruction ?
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I use them in various supplies in the digital front end dealing with iancanada FIFOPi. Mine is a very tame example. Take a glance through ian's thread https://www.diyaudio.com/community/...fight-the-jitter.192465/page-621#post-7672642. He found in increasing order of preference wrt subjective sound quality,Very interesting @wlowes ! From Wikipedia on supercaps: "can accept and deliver charge much faster than batteries" sounds like an interesting idea for powering the the digital. Have you tried powering the digital front end from supercaps too? Have you tried stacking them up to power -15V line too? Any pictures of your contsruction
1. traditional linear power supply with low noise reg
2. Lithium battery,
3. Battery with supercap filter,
4. Large 3000F supercap disconnected from charging source
So mine is a simple cheap hybrid using well filtered linear supply, low noise reg and 1.5F supercap close to the load.
I have not tried supercaps on the -15V. You need a lot of 2.7V caps balanced and it was just not worth it. IMHO the +-5V caps have a more pronounced impact on sound then the -15V line. On the -15V I use linear PS 6th order filter and a salas shunt. After the shunt I use 1000uF BlackGate N in super E config and a BG HiQ cap at the pin. I happened to have them and quite like the sound of BG on the TDA1541a. For completeness all of this is running an S2 variant which I also prefer over std, S1 or R1.
