Yes, but is this your amp of choice, or just proof of concept? 🙂You guys are poo poo'ing this big thru hole board based on the fact that the traces are long and components are big. I am not so sure it makes a big difference. Have you actually heard what this board sounds like before relegating it to the dustheaps of poor sounding designs? I only say this because if you recall I was one of the first to build a tpa3118d2 dead bug style with point to point wiring. I used small SMT components but it was far from an ideal layout and it sounded great. I think it is important to keep the leads between the chip and the inductor as short as possible and keep the power supply bypass caps as close to the chip as possible. But I am not sure if there is detectable effect on SQ if they are a little longer. I would reserve judgement until someone buys one and tests it and listens to it.
Here is the dead bug amp
I will have to find a cheaper source...my cost is more than $5.50 ea in qty of 50.
I'll second an order for your board dug. I'd love to try my hand at building one with TI spec high quality components.
Attachments
Top and Bottom PCB Layout Design
This board is special design for my friend only, as he need it over 100pcs for field application. The height is limited by <21mm, therefore, No better solution for the PSU cap placement. We are tested a lot of digital amps solutions from 50W ~150W power range. Finally, The TPA3116 solution is best. As simple, lower power requirements and High Efficiency, Totally out of our imagine and within the budget. We are also compared all the existing TPA3116 boards in market (Boards all from China). Therefore, Do as our flavor .
Sharing the layout design as this is first sample.
This board is special design for my friend only, as he need it over 100pcs for field application. The height is limited by <21mm, therefore, No better solution for the PSU cap placement. We are tested a lot of digital amps solutions from 50W ~150W power range. Finally, The TPA3116 solution is best. As simple, lower power requirements and High Efficiency, Totally out of our imagine and within the budget. We are also compared all the existing TPA3116 boards in market (Boards all from China). Therefore, Do as our flavor .
Sharing the layout design as this is first sample.
Attachments
No, Just the Big Board is my designed.
Now doing the new layout and take out the PSU Cap and reduce the board size. This new board for my new system.
Hi,
No Heatsink and TPA3116 Thermal PADS (TOP and Bottom) Connect to GND for best system performance
Well, in my photoshop "simulation "I missed by half a centimeter or something close to that 🙂
Alright, so the green board that I am trying to sank into oblivion is 10x9cm versus 61x81cm of the yuan jing board vs 6.5x5.6cm of the DUG board. All being 2.0 channels 2x50W 😀
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Man, make a board with dimensions bellow 6.5x6.5cm, smt components but X7R 250V caps for the bootstrap and a nice mute terminal . No need for volume pot or tank caps... just like the DUG design...
Well, you have a PM.
Yes, target is 6.5x6.5 to minimize the size fit into chassis.
Alright, you are a nice guy.
Please, check your private messages by clicking here
Proof of concept as I had to flip chip upside down with legs up on dead bug and needed thermal pad on bottom which was now, up facing.
Well, I suspected when the different boards are optimized, they will look quite similar. The circuit for this amp is not that complicated (as compare to some other amps) and when squeeze down onto a small PCB, there are only that many ways to package all the component.
I guess one can safely assume that all the boards are designed based on the one that TI originally published.
Regards,