I'd send them an email, to which they seem responsive. You may have to wait until the new year for a reply...
Mine took several months after ordering. Sat in Fulfillment forever. I'm sure it depends if they have stock or not. Last time we had to wait for a whole new batch to be made.
Since the output LC filter is identical, I don't see how the load would differ between the two. However, it looks like the TPA3245 board is revision b, which includes different (better?) grounding of the inputs and VMID components.
The TPA3245 board also has pads to replace the inductors of the LC filter with SMD UA8014-AL inductors, too.
Mike
Connect LRS 350-48 to TPA3255EVM
For those who use Meanwell LRS 350-48 with TPA3255EVM board, can you please post a pictures on how you connect the two together. I am newbie and don't know how to hook these things together. Thank you
For those who use Meanwell LRS 350-48 with TPA3255EVM board, can you please post a pictures on how you connect the two together. I am newbie and don't know how to hook these things together. Thank you
I found it here:
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My power cable has 3 color, Green, white and black. Does Green wire goes to ground, White goes to N and Black goes to L connection
My power cable has 3 color, Green, white and black. Does Green wire goes to ground, White goes to N and Black goes to L connection
That looks good. May we see shots of the front and rear?
Mine is nearly done. I’ll post photos soon.
I have a second 3255EVM that has never been powered up. My son decided to stick with hi refurbished h/k430. I will probably sell it.
Mine is nearly done. I’ll post photos soon.
I have a second 3255EVM that has never been powered up. My son decided to stick with hi refurbished h/k430. I will probably sell it.
The signal is available on the two-row pinheader. (TI Audio Interface) The question was answered in the past.
^ Doc, the discussions about these modules have been rearranged by the moderators, so even if anyone might have a recollection of seeing your answer, it likely isn't where it used to be. Do you know the approximate date you might have posted it, or is there a particular keyword that could be searched?
EDIT: is this what you meant? http://www.diyaudio.com/forums/clas...-post5197395.html?highlight=reset#post5197395
This? http://www.diyaudio.com/forums/class-d/287470-tpa3255-diy-discussion-design-etc-30.html#post5181023
EDIT: is this what you meant? http://www.diyaudio.com/forums/clas...-post5197395.html?highlight=reset#post5197395
This? http://www.diyaudio.com/forums/class-d/287470-tpa3255-diy-discussion-design-etc-30.html#post5181023
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http://www.ti.com/lit/ug/slou441/slou441.pdf
On page 17 of user manual, in schematic section "AUDIO INTERFACE BOARD", there is a definition of pins for the J28 socket.
Add a switch between pin 10 and any one of the ground pins 4, 21, or 22.
When the switch is active, RESET will be enabled.
On page 17 of user manual, in schematic section "AUDIO INTERFACE BOARD", there is a definition of pins for the J28 socket.
Add a switch between pin 10 and any one of the ground pins 4, 21, or 22.
When the switch is active, RESET will be enabled.
As I get ready to put mine in a case, I'm wondering if I should implement this reset reloication. I plan to switch the AC to the Mean Well, leaving the reset switch at normal. Unplugging the meanwell from AC has worked without a problem, so far. Is there an advantage to an external reset switch?
If you only switch AC power to the power supply, you will get a turn-off pop.
Using a 3-pole switch to simultaneously switch AC live, AC neutral, and V+ eliminates the turn-off pop.
I have found minimal turn-on noise, so it's not really necessary, but you can use a delay circuit to hold RESET on until power has settled.
Using a 3-pole switch to simultaneously switch AC live, AC neutral, and V+ eliminates the turn-off pop.
I have found minimal turn-on noise, so it's not really necessary, but you can use a delay circuit to hold RESET on until power has settled.
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Some of us get a small thump on shutdown mostly. I was thinking of implementing a 5v hooked to AC mains switch, powering a micro controller(Arduino Micro) putting a time delay to a optoisolated relay to switch the pin10 to ground. Since the Meanwell takes some time to bring it's voltage down, the 5v should turn off before the Meanwell.... I hope 🙂
This:
http://www.diyaudio.com/forums/class-d/287470-tpa3255-diy-discussion-design-etc-33.html#post5197395
Like ccss posted as well. The link you referred is a possible fix for having shutdown/reset at a fixed very large without using speed-up-caps for increased transient sensitivity. From my experience, the original setup is rather sensitive when using a different VDD-supply. (for Vanalog etc. 12V)
Although I already have my EVM and Meanwell PS already packed into a case, I can't help wondering if this would help with the turn-off pop...
My Meanwell PS stays on for a good three seconds after cutting off AC live.
From the manual...
Although not specifically required, it is a good practice to hold RESET low during power down, thus preventing audible artifacts including pops or clicks by initiating a controlled ramp down sequence of the output voltage.
If one were to use a DPDT like this
Connect AC live to 1P
Connect PS live to 1T
Connect J28.10 to 2P
Connect j28.22 to 2T
When on, AC from 1P to 1T, 2P open (reset normal).
When off, AC open, 2P closed (reset ground).
Would the three second period be long enough for the grounded reset to complete it's ramp down sequence?
I guess this would be no different than cutting AC live and flipping the switch from normal to reset at the same time.
I needed to get this idea out of my head 😱
Mike
My Meanwell PS stays on for a good three seconds after cutting off AC live.
From the manual...
Although not specifically required, it is a good practice to hold RESET low during power down, thus preventing audible artifacts including pops or clicks by initiating a controlled ramp down sequence of the output voltage.
If one were to use a DPDT like this
Connect AC live to 1P
Connect PS live to 1T
Connect J28.10 to 2P
Connect j28.22 to 2T
When on, AC from 1P to 1T, 2P open (reset normal).
When off, AC open, 2P closed (reset ground).
Would the three second period be long enough for the grounded reset to complete it's ramp down sequence?
I guess this would be no different than cutting AC live and flipping the switch from normal to reset at the same time.
I needed to get this idea out of my head 😱
Mike
I wouldn't be happy to have low voltage and live on the same switch. I'd prefer an opticoupler solution if any.
So now that things seem to cool down a bit since the promo code what is the take on sound quality of these 3255 EVM boards? I've read elsewhere that they seem to be low on auditive tiredness in long listening sessions, (that's good in my book) detailed, and many praises for bass. Anyone dare to comment? ( specifying psu- i've seen multichannel set ups with just about 10.000 uf for three board w/linear psu, not top IMHO)
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