I have been having great success using DC step up converters to get 35v from a 19v laptop SMPS.
In fact, two 19v SMPS and two DC step ups in series makes a +/-35v PSU for Class AB amps that is less expensive and far quieter than linear trafos.
These work really well. I have even used for Class A amp at 3amps continuous current at 34v.
New Arrival DC 3V 35V 0 10A Adjustable Digital Converter Step Up Boost Module USB 3 35V 60 x 52 x 22 mm Board-in Integrated Circuits from Electronic Components & Supplies on Aliexpress.com | Alibaba Group
The pictures show two different products. 🙂
10A max input current is the limiting factor + a large step up gap. But if it works, why not.
Im also using a stepup in my TPA3255 bike setup to boost 30-42V (3xSLA in series) up to 51V with a 20/30A boost converter. It works pretty well and cool even at full load. (Electronic music)
10A max input current is the limiting factor + a large step up gap. But if it works, why not.
Im also using a stepup in my TPA3255 bike setup to boost 30-42V (3xSLA in series) up to 51V with a 20/30A boost converter. It works pretty well and cool even at full load. (Electronic music)
Maybe this is a bit more sturdy?
1500W 30A DC DC Boost Converter Step Up Power Supply Module Constant Current(6.8)-in Switching Power Supply from Home Improvement on Aliexpress.com | Alibaba Group
I've seen similar units with no cooling fan and no alu fins on the small IC on top but max load is 12A, and they still say >10A continous needs cooling fan.
And this comes with distancers for mounting also.
1500W 30A DC DC Boost Converter Step Up Power Supply Module Constant Current(6.8)-in Switching Power Supply from Home Improvement on Aliexpress.com | Alibaba Group
I've seen similar units with no cooling fan and no alu fins on the small IC on top but max load is 12A, and they still say >10A continous needs cooling fan.
And this comes with distancers for mounting also.
Of course, I said essentially that. I asked if there was anything showing up on the output of your amp from said modulation. Because we have this beautiful thing called psrr, the measure of how effective the amplifier is at ignoring power supply modulation.
That number is very large, as to essentially make your concern and ostensible solution useless.
First post?
Welcome to the Forum Linas. 🙂
What kind of speakers will you use the TPA3255 with?
Well, not being an electronics engineer, it's a bit difficult for me to visualise this.
I still dont understand why the class D amp will not benefit in bass reproduction by a large cap bank which provides the needed peak / burst current.
I mean why does the class A benefit and why won't class D?
You should just give a try and see. The PSRR measurement on a classD amp is rather a tricky one, there doesn't seem to be agreement on how best to do it. So use your ears for now 🙂
It's a false premise to start with. So any further logic is broken. Maybe understanding the load that you're presenting to the power supply might be helpful? Class-a should be asking the same from the PSU regardless its actual output to the amplifier, so not sure where capacitance helps bass unless you're sitting on clipping (regardless the frequency) or have miserable PSRR (also a definite possibility with many of the common class-A amps). Class-d are very efficient, so their output currents follow closely with output power (variable).
PSUD2
Play with this and start asking yourself how much your power supply is sagging under high output. And how long it's being asked to output a heavy load. You're already starting from 10,000 uF, right? Not a lot of ground left to be gained.
PSUD2
Play with this and start asking yourself how much your power supply is sagging under high output. And how long it's being asked to output a heavy load. You're already starting from 10,000 uF, right? Not a lot of ground left to be gained.
Fine, makes zero distinction as to the bunkum of "class-a and bass" nor the loading of a class a vs class d amplifier in terms of efficiencies.
Show me a case where bass is improved by non-pathologically low amounts of capacitance. We're starting from 10,000 uF on a linear PSU roughly giving a 50v rail if I'm remembering correctly. 😉
Heck, show it in general, with any musical waveform. But start a new thread, since it's an utter waste of time here.
P.S. you're doing your infinitely obnoxious pedantry which is about 95% of the way to trolling.
Heck, show it in general, with any musical waveform. But start a new thread, since it's an utter waste of time here.
P.S. you're doing your infinitely obnoxious pedantry which is about 95% of the way to trolling.
... At any rate, some Class D cause noise in the PSU, and therefore potential issues to other items connected to the same power output. I have been pondering if this might be at least part of the PSRR specifications on Class D amps.