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Old 18th December 2015, 02:43 PM   #1
ToFa is offline ToFa  Bangladesh
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Red face Adding NPN-PNP Transistors with TDA7377 ??

Hi
I have TDA7377 Chip Amp.
I also have some TIP41C and TIP42C NPN-PNP Transistors. They are lying idle. So I want to use them. I was thinking if I can use them with my Chip Amp, that would be great!

But I don't even know how to use those Transistors

Here I attached TDA7377 functional diagram and its Output stage schematic.

If any expert of you can help me with these...!


sorry, I'm not good at English

Thanks in advance..
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Old 19th December 2015, 11:22 AM   #2
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no reply

plz just tell me anybody if it's possible..!!
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Old 19th December 2015, 12:51 PM   #3
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Without proper biasing, there will be extreme distortion and possibly damage to the new transistors and the TDA7377.
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Old 19th December 2015, 08:21 PM   #4
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can u make me a circuit with proper biasing?
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Old 19th December 2015, 08:31 PM   #5
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I think that it would not be advisable with this particular amp since you have no access to the negative feedback loop on two of the sections.

Just study up on the Current Boosted Opamp configuration for more info.

https://www.google.com/search?num=10...59.6tJyvE0xVkQ

There are quite a few threads already on this subject in this forum.

Cheers!!

jer

Here is a little Project that I did that used similar transistors and it worked Great !!!

opamp plus driver stage and output stage with its own supply, what could happen?

Last edited by geraldfryjr; 19th December 2015 at 08:39 PM.
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Old 20th December 2015, 04:44 AM   #6
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thank you

I'm studying on it :3
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