Is that chip glued tightly to the heatsink? I thought silicone grease isn't glueing...
That board has tl074 op-amps.What't that doing? Do you have a schematic? Now that you sacrificed that board , would you be kind to reverse engineer the op amp section? I have an identical board and I'd like to know what can be done to make it work better if possible.
the bluetooth always seems to stay on, regardless if the unit is switched off. Its drained my battery a few times. i was lead to believe that you can solder the two points below the pot to close this, but i dont know how true mr youtube is
i would suggest getting a QCC3003 bt board, or an equivlent in the CSR range. I use it for my 5v builds and get that magic 5w per channel when you use a buck boost converter from 3.7v to 6v. Sounds pretty good to for a low fi setup
https://techtalk.parts-express.com/...p-inspired-3d-printed-ghettoblaster-half-size
my latest build uses it and i get 10 hours run time from a 3000mah 18650 battery....its my own fault as well as i put 4 LED's running always which each draw 20mah, so could have got longer if i wasnt going for the fancy look.
after removing these two resistors, ... should i leave those points open? thanks
The transformer has a power of 30VA (this is not a watt))). AC 18v (DC 27v). The transformer gives a current of less than 2A. This is not enough to power even one channel. Some excess voltage (chip protection may be triggered). Total output power will be 20W (more on short peaks).
Fake TPA3116D2DADR board XH-M543 from Aliexpress
The seller is NK-Shopping Store
The heat sink was not firmly attached and seemed to be glued with some kind of silicone, so I pulled it. There was not need to do it forcefully and the heat sink came out to find beneath a SOIC16 chip labeled TPA3116D2DADR. Some photos of the board and PLEASE UPDATE # 1 with photos of good and fake pcbs
Does anyone knows what the real chip is this ? And maybe some datasheets
Elias
The seller is NK-Shopping Store
The heat sink was not firmly attached and seemed to be glued with some kind of silicone, so I pulled it. There was not need to do it forcefully and the heat sink came out to find beneath a SOIC16 chip labeled TPA3116D2DADR. Some photos of the board and PLEASE UPDATE # 1 with photos of good and fake pcbs
Does anyone knows what the real chip is this ? And maybe some datasheets
Elias
I have an identical kit that works...never thought opening it...It might be the tpa3118 relabeled .They are identical chips with different placement of the heatsink.I actually wondered how much heat can extract a good active heatsink like a peltier out of a 3118 chip so that i could use it at the same output power as 3116.
No, there is no TI SO-16 class-D-chip. These are chinese chips with a fake label on them. Sometimes two of these a below the heat sink of a "TPA3116" board. This has been shown here, maybe in another thread.
from Aliexpress - that is the address you have to beware us from
I think it is more likely a chipstar cs8673e... http://pdf1.alldatasheet.com/datasheet-pdf/view/1143318/YONGFUKANG/CS8673E.html
I have seen some supposed tpa3116s that were actually the chipstar chip and not labled with the BS DADR (which is not even a good way to distinquish it given that DADR is a valid designation for the real 3116 chip in a specific package and ordering format from TI)
I tested the same board above and got 13.3v RMS with a 24v DC supply before clipping with a 1k sine wave into an 8 ohm resistor so it was about 22W. I have no idea how long it could handle that load. I don't think I tested it with an 4 ohm load but I could do it sometime. The real tpa3116 can get just about 28w into 8 ohms IIRC.
Note that I believe the opamps on these are also fake tl072s. I think there was a way to test by sending a fast square wave through them. I will have to try that somtime....
I found it better to bypass them, they add WAY too much gain on the real tpa3115 board. I am not sure what the gain is on the fake one.Get your money back unless they stated that it was the "domestically produced chip" Some suppliers are honest and will send you a real chip if you pay a few dollars more where others are just scamming.
-Rich
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TPA3116 and TPA3118 are identical chips. With loads of 8 Ohms - there is no problem with the TPA3118 without dedicated heatsink. I use them this way for some time in my guitar amps.With 4 Ohms or even 2 Ohms load I would consider TPA3116 with a heatsink.
16pin TPA311x LOL 😂
Some vendors say this particular board is a “copy”
US $3.61 5％ Off | Copy TPA3116D2 Dual-channel Stereo High Power Digital Audio Power Amplifier Board 2*120W XH-M543
https://a.aliexpress.com/_mth7X8O
120W?
Some vendors say this particular board is a “copy”
US $3.61 5％ Off | Copy TPA3116D2 Dual-channel Stereo High Power Digital Audio Power Amplifier Board 2*120W XH-M543
https://a.aliexpress.com/_mth7X8O
120W?