Look like a new player has entered the arena:
TPA3116D2Êý×Ö¹¦·Å°å 50w+50w ³¬TA2024 TA2020 TA2021-ÌÔ±¦Íø
The manufacturer of this board claims to have speaker protection and guarantee no pop at turn on. It uses 10uH inductor, not 220.
Regards,
Hi,
I should be receiving my board within 1-2 days ;-)
Why is there a thump at start on...we normally see this issue with single ended amp with a big cap on the output...this is a differential amplifier...
The small Sure TPA3110 does have a mute pin, does the TPA3116 have one also ?
BR,
Eric
I should be receiving my board within 1-2 days ;-)
Why is there a thump at start on...we normally see this issue with single ended amp with a big cap on the output...this is a differential amplifier...
The small Sure TPA3110 does have a mute pin, does the TPA3116 have one also ?
BR,
Eric
When you see a 3 digit number marked on an inductor, the third digit gives the number of following zeroes. Hence '220' means 22uH - this value is recommended for 8ohm speakers.
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Don't see any speaker protection or pop sensing circuit on the board though. Not that it matters, it looks to me like a significantly better designed board than the YJ one. So I'll give this a go right away.
Thanks for the heads up.
IMHO the origin of the bump is due to the rising voltage of the PSU.
As I ve said before, no bump if I plug the PSU on the board AFTER having powered it on.
The strenght of the bump seems smaller with volume pot removed
Okay, thanks. What about toriods?
Something like this (@14 uH).
I see the YJ board doesn't have the 10µH inductors from the original TI schematic. Is it okay to lower the 22uH on the YJ board somewhat (I'm gonna use 6 ohm speakers)?
PsychoM, nice looking ones ) Unsure if you could solder them in place, they have different footprint and little bigger. Personally I'd stay with shielded though... maybe bullet-shaped pure polished copper caps for'em?
Given 10uH for 4Ohm, 22uH for 8Ohm, so for 6 Ohm 14uH is likely ok. I doubt it's very significiant for the sound.
Given 10uH for 4Ohm, 22uH for 8Ohm, so for 6 Ohm 14uH is likely ok. I doubt it's very significiant for the sound.
The case is really nice! Everything fits in, neat and tidy A lot better than the make shift little wooden box fo rmy 2.0.
Regards,
I'm sorry for misusing this thread....but somehow this problem is connected to the tpa3116.
I created an own thread for this.
Maybe a more experienced member can provide some help.
I spent several nights on this and grilled a handful of opamps.
http://www.diyaudio.com/forums/power-supplies/247007-noob-question-virtual-gnd.html
This one looks promising. I wish it was available as board only though.
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Yeah, I know. In your mind, you probably has picked a "special chasis" for it already
Regards,
You are welcome.
I was wondering too. Usually, speaker protection circuits use relays. I did not see any relay on the board?
Regards,
I had a similar problem with output filter caps blowing up if I disconnected the speaker.
Even 250V caps got a bit hot sometimes with no speaker connected.
I now just load both channels with a speaker load even if not wanting to listen to the other channel.
As Mr TI says the oscillation can become a high voltage and fry the cap.
Even 250V caps got a bit hot sometimes with no speaker connected.
I now just load both channels with a speaker load even if not wanting to listen to the other channel.
As Mr TI says the oscillation can become a high voltage and fry the cap.
I like this one too. Very nice case and build quality looks great. I like the adjustable sub xo freq. Does anyone know what the slope is?