This board is by far not the best and it uses fake nichicon caps.
Try sanwu TPA3118 pbtl mono boards.
They are cheap and are ok.
https://www.aliexpress.com/item/TPA..._4&btsid=c8b65208-62e5-4c6f-828c-b9b5034a42b8
That board is known as the "YJ Blue" and has many issues. There's a wiki pretty much dedicated to improving it but time/effort = very not worth it.
There are many other better boards out there. SANWU have a decent reputation. The "Sanwu blue 3118 mono" boards are good and around £3-£4 each on UK eBay. Anything much cheaper is a rip off of it and doesn't have the "SANWU" print on the bottom of the circuit board.
Ask yourself what features you need on the board. Volume control, on/off switch, terminal connectors, RCA inputs, speaker terminals? Is the a turn on/off pop/thump suppression circuit?
I have the 4xSANWU blue 3118s, a WLX or BREEZE TPA3116 board and a DUAL CHIP TPA3116 board.
J.
Sorry for my ignorance, but can anybody tell me the differences between BTL (Bridge tied load) and PBTL? I don't know whats that P letter for.
Sorry i fix, try again please
https://es.aliexpress.com/store/product/TPA3116-D2-Mono-100-W-Tablero-Del-Amplificador-Audio-Digital-DC12-26-v/1756335_32680916920.html?btsid=e0bf0c71-61d7-4726-9e7d-1ab5cabdc84d&ws_ab_test=searchweb0_0%2Csearchweb201602_2_10065_10056_10068_10055_10054_10069_10059_10078_10079_10073_10017_10080_10070_10082_10081_421_420_10060_10061_10052_10062_10053_10050_10051%2Csearchweb201603_3
https://es.aliexpress.com/store/product/DC-12V-24V-100W-TPA3116DA-Mono-Channel-digital-Power-audio-amplifier-board/1443233_32707868468.html?ws_ab_test=searchweb0_0,searchweb201602_2_10065_10056_10068_10055_10054_10069_10059_10078_10079_10073_10017_10080_10070_10082_10081_421_420_10060_10061_10052_10062_10053_10050_10051,searchweb201603_3&btsid=32d8a188-417d-43e4-a49e-d81128b3e4ed
If you flip between the two it looks (at least to me) like they are exactly the same board...and exactly the same picture.
Another board claims to be mono or more like mono capable. Board piccie shows Sanwu brand.
DC 12V-24V TPA3116 Mono 100W Digital Audio Power Amplifier Board BTL Out Amp | eBay
75mmx50mm
Why are those TPA3118 popular pbtl boards labeled as 60W? If i am correct, TPA3118 has the same capabilities than TPA3116, which can outputs peaks of 160W on pbtl with 2ohm driver. Is it just because they have small capacitors and no heatsink? so one should balance the output around 60W? (varying voltage input)
Because TI labels 3118 as 2x30w 8ohm btl, 1x60w 4 ohm pbtl.
Small Sanwu is only 3116/18 ampboard that can really drive low impedances well.
Small Sanwu is only 3116/18 ampboard that can really drive low impedances well.
At Sanwu the current version looks like this:
https://world.taobao.com/item/523165598502.htm?id=523165598502&spm=a312a.7700714.0.0.gN5vZw&_lang=zh_CN:TB-GBK&thwarea=hw
https://world.taobao.com/item/523165598502.htm?id=523165598502&spm=a312a.7700714.0.0.gN5vZw&_lang=zh_CN:TB-GBK&thwarea=hw
Could not see it, need to be logged in and asian language. 🙁 what about ali or ebay, etc?
HTH
Lots of pictures on the web
eBay advert
Board should be labelled SANWU. Despite the low price, there are clones undercutting them.
Lots of pictures on the web
eBay advert
Board should be labelled SANWU. Despite the low price, there are clones undercutting them.
You are right, I simply replaced the parts with decent industry standard components, like Panasonic. If I'm building another 311x it'll be dual mono from Sanwu.
Thanks Mike. Very kind of you. What I did over the weekend, is making a trial run with 8x 1000uF stock caps from the dual chip board. When I hooked it up, I could be wrong, but the sound became worse! It sounded lazy, sluggish, and muddy. I took it off immediately and now listening to it supplied directly from the PSU.
My question: Is it simply because of bad caps used? Will all class D amp, or any amp for that matter, benefit from a properly designed cap bank?
Please share if you find a decent board, best wishes for your tests. 😀
recommend the small board before this one, The small board no heatsink
with a naked eye It looks better these
DC 12V-24V TPA3116 Mono 100W Digital Audio Power Amplifier Board BTL Out Amp | eBay
Sure I'm wrong, sorry guys I'm very noob at thi, It is my first board :RE and my first project
i need one mono board for one speaker of 40 watts RMS and 8 ohms with a power supply of 19v 3.42A
the next link put for indicating which buy, i buy that, I don't think more
thankss
Reposting from earlier in the thread, but I found this board from Amazon to be of decent quality. First one came with a cap that was loose - I sent it back instead of fixing, just in case anything else was wrong with the board.
Second one works perfectly. Good sized heatsink, no pop when powered on, no loud hiss, and reasonable gain. The board is marked SANWU on the bottom:
Amazon link
Second one works perfectly. Good sized heatsink, no pop when powered on, no loud hiss, and reasonable gain. The board is marked SANWU on the bottom:
Amazon link
I’m just testing this single chip board, bought on AliExpress for 7.60 €.
The only mod I’ve done is to add the R-C snubbers; this mod is quite simple, using the pads of the PCB originally intended to transform the board from dual channel BTL to single channel PBTL.
Anyway, the board seems to work fine, and, in my opinion, does not need any other mod.
The gain is 32 dB (40x), but, driving the input directly with a low impedance source, no noise is audible; modification of the gain is not easy, because to do this you have to remove the heatsink, that is glued over the SMD components (not fixed with screws as in the seller pictures).
With a power supply of 19.5V, the board outputs about 20W/8 ohm or 32W/4 ohm (probably because of power supply current limit) before clipping.
Heatsink and inductors get warm (I should say no more than 50°C), with both channels operating at 10 W continuous power.
Distortion is good, no more than 0.2% at 18W/8 ohm, 6.3 KHz and still better at lower frequencies.
The board is provided with an anti-bump circuit (you can see it in a picture of the board with the heatsink removed, in another post of this thread); a mute input is also provided.
Concerning the supply capacitor (4 x 470uF), in my board they are not Sanyo (as in the seller picture), but they are marked JWCO – LOW ESR; assuming they are not fake, according with JWCO datasheet, they should have an ESR of 65 mohm and a ripple current of 1200 mA, each one: not so bad!
Could you possibly post pictures of what goes where? I have done a similar mod to my Audiobah clone, so have the resistors and capacitors to hand.
Thanks