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Old 10th March 2003, 08:23 PM   #1
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Question TDA2030 for high power amp.

can i make a 300W RMS or more to 4 Ohm from a TDA same as the picture...
to add more transistors of MJE or MJ or 2SC/A ??
to change the power supply to more volts and add a "power resistor" to the TDA .. that dont destroy in high volts...
i can do something ???
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Old 11th March 2003, 12:26 AM   #2
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Lets see, you have forgotten the ground on the power supply
again. And the power supply voltage is too high.

The tda2030 data sheet says a maximum of +/-18 volts.
Which means in bridge mode about 150 watts rms maximum
into 4 ohms. You can parallel all the output transistors
you want and you will not get more than 150 watts.

There is (or was) a national semiconductor driver chip that
would allow you to build a bridge mode amp capable
of more than 800 watts rms into 4 ohms.

Why do you keep looking at the cheapest crap possible?

What will it take to get it thru your head that efficiency
over power wins every time?
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Old 11th March 2003, 12:35 AM   #3
blmn is offline blmn  Brazil
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DJ,

I just add there is a H series for TDA2030 that allows 44V max, and, as far as I remember of this circuit, the sound quality is not very good.


Regards
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Old 11th March 2003, 08:26 AM   #4
palesha is offline palesha  India
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LM 1875 is far better than TDA 2030. Better use LM 1875 or TDA 2050. I just replaced LM 1875 for TDA 2030 and found the sound to be far better. TDA 2050 can be used for more voltage than TDA 2030.
Mahendra Palesha
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Old 11th March 2003, 11:18 AM   #5
djk is offline djk
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"Lets see, you have forgotten the ground on the power supply
again. "

Only needs a ground path for the input bias, and its here. The two 2.2K resistors.

Use a pair of 3886 and raise the supply voltage to 80V, with three paralleled MJ15003/15004 for each transistor shown (0.22R emitter resistors on each), this would do 800W/2R.
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Old 11th March 2003, 12:09 PM   #6
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can i do that with STK465 or other STK ????
DJK u can picture what u say ??
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Old 11th March 2003, 04:55 PM   #7
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for DJK plase answer...
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Old 11th March 2003, 05:07 PM   #8
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You may also use four LM3886 in bridge/parallel-combination
as explained in the following app. note.
http://www.national.com/an/AN/AN-1192.pdf

This should give you at least 200W, probably you could get
over 250W if using LM3886.
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Old 11th March 2003, 08:03 PM   #9
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can i add a power transistor to make high power out?
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Old 11th March 2003, 08:33 PM   #10
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can i add a power transistors to the STK465 to make high power output.... transistors like MJ15003/4 for 4 ohm speakers..
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