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[Artcore87]

Originally Posted by cnx

on the TA3020v3c i added speaker protection circuit, bigger capacitors for the power supply (35mm diameter) and rectifier bridge. the amplifier can be used with smps as well, and the bridge can be removed in this case. BIPS can be used if the supply voltage is close to the upper limit, +-60V to prevent turning ON/OFF when the voltage boost over the maximum limit.
this board can be used in BTL mode directly even without BIPS, by simply connecting one resistor which will bring inverted signal from the output of one channel AO to the input of the other channel AO.
the MOS-FET's can be changed, with IRFB4227 which is one of the best in his class, the efficiency will be improved a little but the output power is still limited to the maximum rail voltage which the IC can admit, so there will be slight changes on the output power.

Thank you CNX, and I'm sorry for the amateurish questions, but I don't understand power supplies very well...

1. What kind of power supply would you recommend for use with this board? Would SMPS or linear offer better performance (noise, good transient performance, minimum voltage drooping, etc.)?

2. If I use a linear power supply and thus leave the rectifier in place... then I'm not sure what exactly I need to purchase to get TA3020v3c up and running. Do I just need a transformer, or something else too?

3. If I want to run the amp safely on 60v, what voltage do I need to feed it? Basically... what changes in voltage do I need to account for that occur due to the rectifier or some other part or function of the amplifier... i.e. if i fed it 60v it would actually end up pushing it over 70v... so to run it on 60v, do i need to feed it 48... 50 volts?


If I go with an SMPS, would this be a good match? Or would the SMPS1000 be significantly better for this application?

Power Supplies, Power Supply, Bench Supplies, Transformers

MFG: HENGFU
P/N: HF300W-S-48
INPUT: 85-132VAC 50/60Hz
OUTPUT: 48VDC @ 6.3A
Specifications/Features: 300W
Enclosed switching supply. Over voltage and short circuit protected, .5% Line/load regulation, 120mV Ripple/Noise max.


Thanks again CNX, its extremely helpful to have you here on the boards to answer these questions, its really outstanding customer service/support and I think it'll really help your sales! I know I'm very interested in purchasing something! Your products seem to offer outstanding value. I was looking at the HLLY TAMP 90 but it looks like I could get more power for equal or less money buying from you!

[fb]

It would seem that the A1000SMPS is only a little bit more money for more output potential, and you get to choose your own fan.




Cristi, It would be great if the datasheets were better for some of your products

Are the SMPS's soft starting?

Is the speaker protection circuit on the TA3020v3c the same as the standalone protection board? What are the relays rated for?

What's the max output of the TA0105ARB board into 8 ohms? I assume 2x ~250W, bridged 500W? Will this require a +-90v PSU?


How do we order modules with custom instructions?


Thankyou

[ashok]

Hi Cristi,
The parcel was very well padded. Everything arrived safe.
Just rigged up the TDA8920 board with a 16-0-16 V transformer. Sounds very good. Especially the low end is deep and tight ! I've heard better HF but that could just be the input cap. There is no space to put in botique caps and it would also kill the price advantage. Later I compared it with another Rotel ss amp and found that the HF was similar. However the TDA bass was far superior. Great board. Thanks.

[hawui1]

I have a TA3020 v3b that is close to the v3c version, I try to answer to some questions of Artcore87

1. What kind of power supply would you recommend for use with this board? Would SMPS or linear offer better performance (noise, good transient performance, minimum voltage drooping, etc.)?
-Especially with class D/T amplifier my experience is that the SMPS are a better match, in particular I experienced tighter bass and a sound that is noticeably more clear

2. If I use a linear power supply and thus leave the rectifier in place... then I'm not sure what exactly I need to purchase to get TA3020v3c up and running. Do I just need a transformer, or something else too?
-Typically a dual secondaries transformer able to provide a DUAL DC output after the bridge diodes of +/- 50V DC respect to a ground. Moreover it would be nice to add some good quality electrolytic capacitors as power reservoir

3. If I want to run the amp safely on 60v, what voltage do I need to feed it? Basically... what changes in voltage do I need to account for that occur due to the rectifier or some other part or function of the amplifier... i.e. if i fed it 60v it would actually end up pushing it over 70v... so to run it on 60v, do i need to feed it 48... 50 volts?
-The conversion factor is 1,4.. if AC voltage is, say, 35V 35*1,4 = 49V when converted to DC .. obviously you've to take into account the voltage on the transformer varies according to the load (more load= decreased voltage) so if the transformer gives 35V ac per each secondary when loaded, when idle the voltage will be much higher.. With the SMPS, given the voltage is regulated, I keep it constantly at +/-55 Vdc

INPUT: 85-132VAC 50/60Hz
OUTPUT: 48VDC @ 6.3A
-Don't know but this one looks like a single supply output.. if this is the case you would need two of these connected in series (and this is not a good solution).. You'd better to go for the SMPS1000 that already produces a dual +/- 50V voltage or a
coldamp SPS80 (like I have) https://www.coldamp.com/store/sps80.html
or a Redrock Audio SMPS Red Rocks Audio

[hawui1]

Another point.. I have both a TA2022 based amp and (now) a TA3020 v3b.. I would say the TA3020 has a sound quality that is MUCH better.. Is not just a question of more power..

[fb]

Cristi, some more questions in addition to mine above:

Do the SMPS's have PFC?

When do you anticipate having the 2kw SMPS available?

How does the sound quality of the TA0105ARB board compare to the TA3020v3 boards?


Thanks

[Cristi]

i was out in the past few days with limited internet access. i will try to answer to the questions

Originally Posted by Artcore87

Thank you CNX, and I'm sorry for the amateurish questions, but I don't understand power supplies very well...

1. What kind of power supply would you recommend for use with this board? Would SMPS or linear offer better performance (noise, good transient performance, minimum voltage drooping, etc.)?

2. If I use a linear power supply and thus leave the rectifier in place... then I'm not sure what exactly I need to purchase to get TA3020v3c up and running. Do I just need a transformer, or something else too?

3. If I want to run the amp safely on 60v, what voltage do I need to feed it? Basically... what changes in voltage do I need to account for that occur due to the rectifier or some other part or function of the amplifier... i.e. if i fed it 60v it would actually end up pushing it over 70v... so to run it on 60v, do i need to feed it 48... 50 volts?


If I go with an SMPS, would this be a good match? Or would the SMPS1000 be significantly better for this application?

Power Supplies, Power Supply, Bench Supplies, Transformers

MFG: HENGFU
P/N: HF300W-S-48
INPUT: 85-132VAC 50/60Hz
OUTPUT: 48VDC @ 6.3A
Specifications/Features: 300W
Enclosed switching supply. Over voltage and short circuit protected, .5% Line/load regulation, 120mV Ripple/Noise max.


Thanks again CNX, its extremely helpful to have you here on the boards to answer these questions, its really outstanding customer service/support and I think it'll really help your sales! I know I'm very interested in purchasing something! Your products seem to offer outstanding value. I was looking at the HLLY TAMP 90 but it looks like I could get more power for equal or less money buying from you!

you got some answers in the meantime, i also recommend to use a SMPS, regulated one is better. +-60V is the upper limit for the TA3020 amplifier, for long time reliability. if you feed the amp with this voltage value, is possible that the amp will toggle on/off when the voltage will get higher than 62-63V due to pumping. if you shift the signal phase with 180* for one channel, this may be prevented to happen.
the smps from your link is single rail, and you might need 2 identical smps to do the job. if you want to use them, you must be check if the secondary GND is connected or not to the case and the insulation resistance. one of the smps will have to work with - at GND and one with + at GND, connected in series. for this amp you can use this smps which i made, without any complications Connexelectronic

Originally Posted by fb

It would seem that the A1000SMPS is only a little bit more money for more output potential, and you get to choose your own fan.

Cristi, It would be great if the datasheets were better for some of your products

Are the SMPS's soft starting?

Is the speaker protection circuit on the TA3020v3c the same as the standalone protection board? What are the relays rated for?

What's the max output of the TA0105ARB board into 8 ohms? I assume 2x ~250W, bridged 500W? Will this require a +-90v PSU?

How do we order modules with custom instructions?

Thankyou

i will write more manuals soon, when i will have more time. now i'm too busy with other things and orders and i try to make all of them.
the smps has built-in softstart. is an inrush current limiter.
the speaker protection included on the TA3020v3c board is similar to the stand-alone one and use 2x5A relays. altought the peak current of the amp can reach 10A, the long time average current is less than 5A. also, the relay is rated at 5A when working at 250V~ or 30V DC, which is not this case.
the TA0105ARB can deliver 2x300W at 8R with +-80 to +-90V supply. the maximum power which can get on 8 ohms is 500W each channel if i replace the output transistors. the ic maximum supply voltage is +-200V.
for the modules which doesn't have online instructions, i send them by mail, on request.

Originally Posted by ashok

Hi Cristi,
The parcel was very well padded. Everything arrived safe.
Just rigged up the TDA8920 board with a 16-0-16 V transformer. Sounds very good. Especially the low end is deep and tight ! I've heard better HF but that could just be the input cap. There is no space to put in botique caps and it would also kill the price advantage. Later I compared it with another Rotel ss amp and found that the HF was similar. However the TDA bass was far superior. Great board. Thanks.

you can try to add bigger capacitors for the input but i do not recommend this on class D and T amps. the big capacitors have also big area, and they will act like an antenna and will also form a larger parasitic capacitance between input and inductors which carries high frequency - high amplitude currents.

Originally Posted by fb

Cristi, some more questions in addition to mine above:
Do the SMPS's have PFC?
When do you anticipate having the 2kw SMPS available?
How does the sound quality of the TA0105ARB board compare to the TA3020v3 boards?
Thanks

the A1000SMPS is without PFC. next version will have.
the 2KW smps will come probably at the beggining of next year, there is no time to finish the production this year. some other projects came between in the meantime.
the sound of TA0105, well.... my subjective opinion is that is more dynamic. the supply voltage is higher, the output voltage excursion is also higher, so the output can follow the input faster for this amp than the others. or maybe my speakers are too small for this power

[fb]

Thanks Cristi

How does the idle power usage compare between TA3020v3c and TA0105ARB?

What is the bridged power rating into 8ohm of the standard TA0105ARB?

[luka]

Originally Posted by fb

What is the bridged power rating into 8ohm of the standard TA0105ARB?

A lot.... can't you check IC data and see for yourself?

[fb]

I'm talking about the standard board as sold by CNX on his website, not what the chip is theoretically capable of