What current at 24V is required to extract 100W into 2 ohms PBTL
I'm using 2 x 10uH inductor in output.
I'm using 2 x 10uH inductor in output.
Data sheet says about 88% efficient at that voltage, power and load.
100W / .88 = 113.63W
113.63W / 24V = 4.734A
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How to repair? What to replace?
I've checked the connections. The hum is still present.
What can I do to repair the amp?
I've checked the connections. The hum is still present.
What can I do to repair the amp?
Thanks DUG.
The output inductors can block the power output?
I am using 2 x 10uH for freq 400KHz.
What is the maximum input sensitivity?
The output inductors can block the power output?
I am using 2 x 10uH for freq 400KHz.
What is the maximum input sensitivity?
A good match with some CHR70 mini-karlsonators has rekindled my interest in the tpa3116. Can anyone provide me with some mouser part #s for good input caps for the YJ black boards?
I found these
Also, are the bootstrap snubber mods still recommended? Or am I better off just getting one of the new Sure boards?
Thanks for any help!
I found these
Also, are the bootstrap snubber mods still recommended? Or am I better off just getting one of the new Sure boards?
Thanks for any help!
SMAKN amp from Amazon
NI just got one of these amps from Amazon for $20. SMAKN® TPA3116 Amplifier Board(50W+50W) D Class Amplifier Board:Amazon:Electronics A very neat looking well built unit with some features that may be unique in such a small package. Here are some photos of the top and bottom side:
Observations:
1. The volume pot is high quality and includes a power off feature with a click when turned all the way left. Nice feature and doesn't seem to pop speakers either.
2. There is bright blue power LED that goes off when unit is switched off.
3. It has a nice solidly mounted heat sink that won't come off as the pins are soldered onto pcb.
4. It uses mostly SMT parts but has thru hole options on many like the input caps are 1uF 63V ceramic candy drop orange units which make upgrading easy.
5. It uses 22uH coils SMT style but underneath are thru holes in case you want to use radial lead coils.
6. It has correct value 0.68uF metalized poly film caps on LC filter.
7. It does not have any RF snubber after the LC filter! Nor does it have bootstrap snubber. However, there is plenty of access on bottom side for adding either axial lead or SMT bootstrap snubber.
8. There is a spot for adding a 7805 voltage regulator and 5v output solder pad.
9. There are numerous open solder bridge points for effecting options such as PBTL mode and others which I don't know as they are labeled in Chinese on the PCB. Maybe someone can translate for me. I see a gain setting of 26dB vs 36dB silk screened on bottom. Wonder how to change that via solder bridge points?
10. There is both 3pin (with cable) and 3.5mm stereo jack inputs.
11. The positive and negative terminals on the speaker outs are mirror image +/- , -/+ and are CORRECTLY labeled.
12. There is a input protection diode that is bypassabe with solder bridge point.
13. There are many solder pads for SD, Mute, etc.
14. The parts quality in general looks good and soldering quality and craftsmanship are clean. No ugly looking joints or sloppy skewed parts.
I have not had a chance to test extensively but initial listening with a full range Dayton RS100-4 in an XKi enclosure sound good. I will have to put on my reference system and measure response compared to my DUG v0 amp to see if it looks good. So far it seems like a great value and would be ideal for mods on many components. My concern is lack of RF snubber on output. Similar to a YJ blue black Danzz amp, the coils are slightly warm at idle even.
Looking for feedback from others who may have tried this and help with PCB text translation.
NI just got one of these amps from Amazon for $20. SMAKN® TPA3116 Amplifier Board(50W+50W) D Class Amplifier Board:Amazon:Electronics A very neat looking well built unit with some features that may be unique in such a small package. Here are some photos of the top and bottom side:
Observations:
1. The volume pot is high quality and includes a power off feature with a click when turned all the way left. Nice feature and doesn't seem to pop speakers either.
2. There is bright blue power LED that goes off when unit is switched off.
3. It has a nice solidly mounted heat sink that won't come off as the pins are soldered onto pcb.
4. It uses mostly SMT parts but has thru hole options on many like the input caps are 1uF 63V ceramic candy drop orange units which make upgrading easy.
5. It uses 22uH coils SMT style but underneath are thru holes in case you want to use radial lead coils.
6. It has correct value 0.68uF metalized poly film caps on LC filter.
7. It does not have any RF snubber after the LC filter! Nor does it have bootstrap snubber. However, there is plenty of access on bottom side for adding either axial lead or SMT bootstrap snubber.
8. There is a spot for adding a 7805 voltage regulator and 5v output solder pad.
9. There are numerous open solder bridge points for effecting options such as PBTL mode and others which I don't know as they are labeled in Chinese on the PCB. Maybe someone can translate for me. I see a gain setting of 26dB vs 36dB silk screened on bottom. Wonder how to change that via solder bridge points?
10. There is both 3pin (with cable) and 3.5mm stereo jack inputs.
11. The positive and negative terminals on the speaker outs are mirror image +/- , -/+ and are CORRECTLY labeled.
12. There is a input protection diode that is bypassabe with solder bridge point.
13. There are many solder pads for SD, Mute, etc.
14. The parts quality in general looks good and soldering quality and craftsmanship are clean. No ugly looking joints or sloppy skewed parts.
I have not had a chance to test extensively but initial listening with a full range Dayton RS100-4 in an XKi enclosure sound good. I will have to put on my reference system and measure response compared to my DUG v0 amp to see if it looks good. So far it seems like a great value and would be ideal for mods on many components. My concern is lack of RF snubber on output. Similar to a YJ blue black Danzz amp, the coils are slightly warm at idle even.
Looking for feedback from others who may have tried this and help with PCB text translation.
Attachments
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I ordered a board very similar yesterday!
Looks to have some different parts from yours, but exactly same design. Mine was $12 though...
PS. I could help with the Chinese, but the included pics are both top ones.! 😉
Here's the one I ordered:
Looks to have some different parts from yours, but exactly same design. Mine was $12 though...
PS. I could help with the Chinese, but the included pics are both top ones.! 😉
Here's the one I ordered:
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Maybe not needed with this design and short twisted wires. Wont judge without EMI/EMT measurement.
Chinese characters are a little hard to read at that resolution.
I'll wait for my board to arrive.
I'll wait for my board to arrive.
Tone board
I ordered this board during the Chinese New Year. It was only $9.90 shipped so I didn't mind the longer wait.
I hooked it to my favorite Class D board, the Sure TPA 3110 (with Oscons mod), I used my Astron PS to power both boards. This thing sounds pretty good, no noise, or hiss. It has bass, treble; balance; volume; loudness controls. Bass control is especially useful.
I then tried it in front of my cheap 6N3 tube preamp/Sure amp. The sound is smoother, warmer, and a little more to my liking. The balance control is useful, and the loudness control also works good. Currently using with my PC for music streaming. All in all so far I like this little board.
I think I will put it in a box with one of my TPA 3116 B/B boards to use as a portable with a couple of Bookshelf speakers I have. With the tone, and balance controls, it should be good for a portable system where speakers may not be placed in ideal locations.
Anyway - so far it was a a worthwhile $10 spent.
I ordered this board during the Chinese New Year. It was only $9.90 shipped so I didn't mind the longer wait.
I hooked it to my favorite Class D board, the Sure TPA 3110 (with Oscons mod), I used my Astron PS to power both boards. This thing sounds pretty good, no noise, or hiss. It has bass, treble; balance; volume; loudness controls. Bass control is especially useful.
I then tried it in front of my cheap 6N3 tube preamp/Sure amp. The sound is smoother, warmer, and a little more to my liking. The balance control is useful, and the loudness control also works good. Currently using with my PC for music streaming. All in all so far I like this little board.
I think I will put it in a box with one of my TPA 3116 B/B boards to use as a portable with a couple of Bookshelf speakers I have. With the tone, and balance controls, it should be good for a portable system where speakers may not be placed in ideal locations.
Anyway - so far it was a a worthwhile $10 spent.
That's too bad. Amazon canada is not the same? What happened to NAFTA?
Anyhow, got to listen to it some more today, even cranked it loud at one point. Very nice sounding amp.
Best part: on off switch built in and absolutely no pop on or off! There must be a special way that the volume pot/on off switch ties the input caps to ground on the off position? Or is off really just connecting the SD pin to ground? If so how does LED turn off?
If you look at the bottom side of the board, it seems that the power switch ties the capacitor power rail to a region near the SD pin. The same trace probably also powers the LED. So I think the power switch is actuating the SD pin and not the power to the rail. Thus the amp is on "standby" when switched off. This makes sense because is a PC pin near power switch that probably allows remote shutdown by a smart device via 5V level to same switch.
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