Thanks for this video, by now I am repairing a Mackie 450 v3 which use this IC in the bass amp and I am so disappointed of company's like NXP because so many speakers use this IC for Gods sake like this Mackie 450 V3, some FBT's and Yamaha and if I were one of this company's I would not use any NXP IC in the future as they must be punished 😡
This is funny. A friend of mine gave me 2x v3 to fix. Last time he used them we were both at the wedding. I think nobody notices the bass die in the mackies because we were also using a sub. I looked all through youtube for tips but nobody has vids on the V3. As i wrote above seems one of the bootstrap legs is shorting internally to it's corresponding output leg. Is that what you found. I feel i should check for signal before i order but i'm 99% sure it's the TDA8954 with this short on the boot. Will buy a generic from Ali but i never trusted these new style amp chips since they came out. All that heat in such a tiny space with virtually no heatsink.
I'm looking at a mackie srm 450 v3. The bass drives is driven from one of these. I see there seems to be a short from one of the bootstrap pins to it's corresponding output (running always in bridged mode) I'm going to say that this must be blown the other output has no short to the bootstrap. I removed the cap and the short is still there. Less than €9 including shipping to France from Aliex.
i really wanted to buy 1 of these TDA8954 board because of so much positive reviews but when i came across the NXP site this is the first thing that i noticed when i opened the part# is the end of life...maybe i will try the TI TPA3255 and hope you will do also a review video about any of the Texas Instrument class-D Amp :)
Hello, I have a Yorkville PA system, and found that the tda8954j ic was shorted...person who owned it had a power surge is how it got damaged...am I screwed for trying to get a replacement ? Is there a substitute ic? Thanks 🙏
Here is a link to this 'original' part on Amazon, and the great thing with Amazon is their return policy. amzn.to/3N2GW1w I have purchased OpAmps from this seller and they were as advertised - if that helps. Also there are many vendors - like Mouser selling them, so they seem to be readily available;)
@@KissAnalog so I got my replacement IC installed and tested. The good news on the fuses didn't blow this time but the volume is very faint and low tonned. Also the amplifier ic is getting hot...any suggestions?
Do you think It is pure 420+420= 840 watts? Another issue how many volts and amperes can I give in this amplifier board? If I use 30-0-30 volts & 20 amperes then will it be risk for amplifier board? Waiting for your reply.
I have a bass amp that uses the TDA8954, and all of a sudden the two output filter inductors burnt. May you have any suggestions as what could of went wrong?
Wow, it sounds like there might have been a near short - something to overload it and heat the inductors - or low frequency at high level? Are the TDA8954s still functioning?
I don’t know if it’s still working but it is a prime suspect, the amp just makes a clicking noise when you turn it on. That noise started intermittently but always about 10 minutes after turning it on until it quit. I never had it at full volume and the bass has passive output. Everything before the power amp seems to be in working order, since the headphones and xlr outputs function well. I can’t see any other signs of damage anywhere else.
The real question is are these Chinese parts from eBay real or counterfeit parts? There is currently a global electronic parts supply shortage that doesn’t look like it’s going to end anytime soon. Finding end-of-life parts or obsolete parts now is even more difficult than it has been before. Good luck with your end of life part search.
I have several old computers from the 80's and I run into this all the time. I use Ebay and sometimes Aliexpress to make repairs. I've paid 50 dollars for one chip off Ebay. You can also buy broken equipment and try desoldering the chip it in hopes it is still good. Like you said maybe you can find a pin compatible replacement. If not there is always like you said daughter boards to make something else to work.
I would be leery about parts from China. They are notorious for making counterfeit parts, and they usually are not up to the same standards as the original.
For 3 bucks it was a real bargain. For lower power amps single power supply is more desirable. For high power class D modules, external mosfet's are more reasonable. This one was somewhere in between.
Yes, that is a great question! They do make parts, but not drop in or FFF (Form Fit Function). I am looking at some of their parts to do my own design;)
Estou com 1 caixa jbl eon615 que queimaram as 2 saídas. Verifiquei alimentação, clock mas não sai som de jeito nenhum. Elas usam 2 tda8954 th como saídas de audio
I’m probably in the minority of your audience because I’m a beginner. However, I wish you would put a kit together and sell on EBay or something and do a video of construction of it with some details on how it works.
Thanks Jay! I'm sure there are plenty of folks like yourself that would like something that they can count on. I do want - now than ever - to put together a kit amp that everyone can have. Most likely at different power levels;)
Even if it was just a nice board he uploads to a site like PCB way plus a BOM I'd be cool with that. You would at least know it does rated power and the THD wasn't off the charts. About 80% of the kits on eBay sound terrible.
Philips TDA series's sound is bad! (esp. HF) ; HIFI level class D: discontinued TRIPATH TK2050, now TI's TPA324x? 2 cell powered NS4110B: cheap,simple,good sound, much better than PAM8403...etc. For linear amp, TDA7850 car chip :D, enough for home use.
Thank you for this great feedback. I liked the idea of the tripath, but then they stopped making them... Every time I start to like one of these modular designs it comes back to bite me;)
coolGaN board EVAL_AUDAMP24 Single-ended, 2-channel CoolGaN™ class D amplifier for premium audio applications The EVAL_AUDAMP24 e-mode GaN HEMT-based evaluation board is a 2-channel, 225W/ch (4Ω at ±43V) or 250 W/ch( 8Ω at ±63V) half-bridge class D audio power amplifier for high-end Hi-Fi audio systems. This evaluation board demonstrates how to use the IGT40R070D1 E8220 CoolGaN™ gallium nitride transistor together with the MERUS™ IRS20957SPBF controller IC, implement protection circuits, and design an optimum PCB layout. The reference design provides all the required housekeeping power supplies for ease of use. The 2-channel design is scalable for power and the number of channels.
for class D, I like infineon and TI ... www.infineon.com/cms/en/product/power/class-d-audio-amplifier-ic/ check it out and let me know what you think. BTW they have GaN too.
I am just hoping that the LM1875 will be around for some time. The Alternative TDA2050 is obsolete and everything that comes from China is counterfeit. That is why I would recommend NOT to buy these TDA8954 if they come from China, they will be el-fakos and you will waste your money and experience lots of frustrations if you roll the dice.
Ha Ha, Never mind. I just read a bunch of comments saying the same thing. I guess I'm a slow learner, Been burned a few times by Chinese fakes. Every now and then you'll Jag a good one but, If you like gambling
The trick is the original parts are often Chinese made, so it is the counterfeit parts that we need to look out after. But the trick is which parts do we have to worry about?
I love your work, but why does it take 5 min. to say, "I'm really sad, but this part has been discontinued. My friend and I would have liked to build amps with it - but now we will have to find another solution."? For me, all I need to know is, "we were going to use this, but now we can't." The journey of discovery in web page screenshots that you cannot buy, is not interesting as i can do that myself in about 30 seconds. It's a story for you to say, "I wanted to do this with my friend - these were our plans electronically." There's not much of a story to, "I can't get this part anymore, and here is how I searched to prove it," or something similar to that. Again, your work is great, and that's why I keep watching. But I sincerely believe, you could cut your information in half, drop unnecessary additions to descriptions, and your videos would improve dramatically. And your friend, I stopped watching him finally. Why? Extraneous information, usually in the form of complaining. You don't do that. I like that you do not do that. Here you are not complaining. You are simply stating facts.
If the creator feels like telling a story, the creator is gonna tell a story. Not everything needs to be hyper efficient. I actually like the "rawness" of these videos.
Thanks for watching and supporting! I'm sorry that I'm not the most efficient:) I can talk your ear off if you let me;) But, I did want to explain how that the design process has to take this into consideration. There are some viewers who might be budding engineers that like to know the real world of engineering...
@@KissAnalog Me for one. But then some videos I can skip forward on because I know a fair bit of that stuff. Just means you can't address the needs of every single one of your audience in any one video. That's what the pause, rewind, fast forward and "back to RU-vid Home" buttons are for. Man, I wish those buttons where available for live tv to skip ads!! Not criticising Crash Like This' comment though.
