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Best 5V SMPS ?
Best 5V SMPS ?
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Old 1st January 2018, 11:20 AM   #61
cdsgames is offline cdsgames  Canada
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Precisely why we chose resonant when we started the design..
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Old 3rd January 2018, 11:34 AM   #62
cdsgames is offline cdsgames  Canada
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New PCB design (final) has started. Noise/ripple are 140uV(switching noise and ripple included) above our oscilloscope (with differential amplifier ) noise floor (300uV) in the 0-100Khz

We are optimizing the PCB layout and will do test final product.
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Old 4th January 2018, 11:40 AM   #63
Josv is offline Josv  Netherlands
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Smile max voltage power for Kali Reclocker?

Hi cdsgames, I am the happy owner of a Kali Reclocker (with RPI2 and DAC) and want to give it the best food!
I have a 6 volt lead acid battery (agm), fresh loaded 6,4 volt.
With a buck converter from 6,4 to 5 volt it works, but it creates new noise
Can the Reclocker handle more than 5 volt?
What is the max?
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Old 5th January 2018, 04:06 PM   #64
cdsgames is offline cdsgames  Canada
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5.5V max for Kali. Please keep this thread for SMPS 5v
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Old 9th January 2018, 10:11 AM   #65
cdsgames is offline cdsgames  Canada
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Latest reading on our test setup.

Using a spectrum analyzer, we measured 17uV RMS of ripple/noise 0-400Khz . (1w)
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Old 10th January 2018, 07:21 AM   #66
soundcheck is offline soundcheck  Germany
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Location: DUS
Wow. What a progress!

I do have the feeling that the PSU market gets shuffled soon.
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Old 17th January 2018, 12:31 AM   #67
SanjeevM is offline SanjeevM
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@cdsgames: These specs are phenomenally good!!

If you can also provide screw terminals for Vout, it will be possible for DIYers to mount the PS inside the cabinet and use shorter DC cables. (Though I wonder if there will be increased noise due to EM affecting the TPA3255 board!).

I am currently using a RPi with Allo Boss DAC HAT (older verseion) and a 7 in lcd. Power is fed thru the RPI to the DAC and by USB from the RPi to the Lcd using an IFI 5V adapter. The yellow power symbol keeps coming on indicating that the voltage to the RPi is low. Is it because the setup needs more current than 2.5A the IFI provides? Can you test your unit for this setup please.

Last edited by SanjeevM; 17th January 2018 at 12:36 AM.
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Old 17th January 2018, 11:23 AM   #68
cdsgames is offline cdsgames  Canada
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Your current is fine, but ifi PSUs will drop voltage to 4.8v as you approach 2.2A
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Old 17th January 2018, 12:09 PM   #69
SanjeevM is offline SanjeevM
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Ok. That's the reason.
__________________
RPi 3/ Boss DAC 1.2/ TPA3251/ IFI Power 5V & Allo Adapter/ Paradigm Monitor 11 / Non-Electronics background
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Old 18th January 2018, 06:59 AM   #70
soundcheck is offline soundcheck  Germany
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I just learned that you've upgraded your boards (at least the Boss I heard of) in the power area.
Which (hopefully) would now allow to combine them or run them separately. And I'd hope to see the same consistent powering scheme over all your board offerings.

Can you confirm related updates for the other boards - Kali/Piano(2.1) - as well ??

And you also introduced (are introducing!?!?) a jumper (no more soldering, cutting traces or similar) to accomplish the separation of power rails between the boards.
To finally allow any combination of powering in a convenient fashion. Can you confirm this too??

Ah. The cream of the cake for the DIY crowd: Have you introduced soldering joints to solder power cables right to the board?


If so - to all above. Great.
We've been discussing it since quite some time and more than once.


However.

I also learned that e.g. the most recent Boss (a new board revision 1.4 or similar) comes now with USB-C ports!?!?

USB-C??

USB-C is not what I'd call standard in this area!!!!
Will you force us to switch all our power supplies and cabling!?!?
Now we'd be facing mixes of uUSB and USB-C on our PI towers!!!
You can't be serious about this !?!?

I guess your new 5V supply will then also come with USB-C !?!?

Last edited by soundcheck; 18th January 2018 at 07:12 AM.
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