NEW Audio amplifier kits, modules and many others.

[luka]

well do you know what is its max working voltage? if so, then you pretty much know what it can do, is that not so?

[fb]

Cristi said the max voltage of the TA0105A is +-200V. By my calculation that gives a bridged power of 6400W into 8ohm with ~28amps of current. My suspicion is that the TA0105ARB board as currently available will not be able to handle that.

For +-80V, 1024W with ~11 amps current seems more reasonable.

My knowledge is not great, but I think without some more information from Cristi about the mosfets, PCB etc., we cannot know for sure.

[Cristi]

the available board can deliver up to 500W at 4 ohms and 280W on 8 Ohms.
i mention that the ic can work at up to +-200V but in a practical design will never be used at such voltages. up to +-140 to 160 is resonable. there must be a safety margin of at least 25% for reliable usage. even so, with +-140V rails you can get huge output power even in single ended, not to talk about BTL. for this, must use a complete redesigned pcb, with multiple output MOS-FET's and a much more tight layout, prefereable 4 layers with 3 oz. copper, very short and wide tracks, ground planes, etc....

[fb]

You should design such a board Most vendors will not sell to DIYers.

I do not need such high power though - it looks like the stock board will do for me.


What is the idle power usage of the TA3020 and TA0105A boards?


Thanks for your help

[Cristi]

i started the design of such board, but i abandoned the design, since the TA0105A is obsolete already and i have just few pcs. left for the boards which i already have. i cannot get new stock at a resonable price, but probably i will make the design with the chipset used for the TA0105 ic.
the idle current of the TA0105 is arround 70-100mA on power rails, 50mA on 5V and 250mA on 12V. the TA3020 idle current, i measured and post on a previous page of this thread few months ago.

[DIGORA]

HY cnx

Do you have an idea to use a vertical heatsink of an amplifier box for the TA3020 ?

I have an empty box like this : http://www.audiophonics.fr/images2/4...PANTE-5U_1.jpg

8ch off TA3020

Do you have a pic without heatsink of the V3C ?

Thanks

[Cristi]

in this configuration is hard to use a vertical heatsink unless you use some heatslug to conduct the heat from the transistors and ic to the heatsinks which will be attached at the edges of the board. if i will have request for such arrangement, i can order both the vertical heatsinks and the heatslug.
i will make a photo of the module without heatsink later, and post here. it looks very similar with v3b but is bigger size due to the capacitors and speaker protection.

[DIGORA]

I just found a copper plate maybe large enough to use them

what is the size of the Heatsink ?

[dubai2000]

Perhaps a question other people might have as well: if I want to replace the rectifier bridge in the TA3020 V2 amp with diodes, which values should those have?

[luka]

same or higher then rectifier bridge itself